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<script src="https://snack.expo.io/embed.js" defer="defer"></script><title data-react-helmet="true">Custom WebView · React Native</title><meta data-react-helmet="true" property="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:image:alt" content="Image for React Native"><meta data-react-helmet="true" name="docsearch:language" content="en"><meta data-react-helmet="true" name="docsearch:version" content="current"><meta data-react-helmet="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-react-helmet="true" property="og:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:card" content="summary"><meta data-react-helmet="true" name="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" property="og:title" content="Custom WebView · React Native"><meta data-react-helmet="true" name="description" content="While the built-in web view has a lot of features, it is not possible to handle every use-case in React Native. You can, however, extend the web view with native code without forking React Native or duplicating all the existing web view code."><meta data-react-helmet="true" property="og:description" content="While the built-in web view has a lot of features, it is not possible to handle every use-case in React Native. You can, however, extend the web view with native code without forking React Native or duplicating all the existing web view code."><meta data-react-helmet="true" property="og:url" content="https://reactnative.dev/docs/next/custom-webview-android"><link data-react-helmet="true" rel="shortcut icon" href="/img/favicon.ico"><link data-react-helmet="true" rel="preconnect" href="https://BH4D9OD16A-dsn.algolia.net" crossorigin="anonymous"><link data-react-helmet="true" rel="canonical" href="https://reactnative.dev/docs/next/custom-webview-android"><link rel="stylesheet" href="/styles.fccefeba.css">
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<nav class="navbar navbar--fixed-top navbar--dark"><div class="navbar__inner"><div class="navbar__items"><div aria-label="Navigation bar toggle" class="navbar__toggle" role="button" tabindex="0"><svg xmlns="http://www.w3.org/2000/svg" width="30" height="30" viewBox="0 0 30 30" role="img" focusable="false"><title>Menu</title><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></div><a class="navbar__brand" href="/"><img class="navbar__logo" src="/img/header_logo.svg" alt="React Native"><strong class="navbar__title">React Native</strong></a><div class="navbar__item dropdown dropdown--hoverable dropdown--left"><a class="navbar__item navbar__link" href="/docs/next/getting-started">Next</a><ul class="dropdown__menu"><li><a aria-current="page" class="dropdown__link dropdown__link--active" href="/docs/next/custom-webview-android">Next</a></li><li><a class="dropdown__link" href="/docs/custom-webview-android">0.63</a></li><li><a class="dropdown__link" href="/docs/0.62/custom-webview-android">0.62</a></li><li><a class="dropdown__link" href="/docs/0.61/custom-webview-android">0.61</a></li><li><a class="dropdown__link" href="/docs/0.60/custom-webview-android">0.60</a></li><li><a class="dropdown__link" href="/versions">All versions</a></li></ul></div></div><div class="navbar__items navbar__items--right"><a class="navbar__item navbar__link" href="/docs/next/getting-started">Docs</a><a class="navbar__item navbar__link" href="/docs/next/components-and-apis">Components</a><a class="navbar__item navbar__link" href="/docs/next/accessibilityinfo">API</a><a class="navbar__item navbar__link" href="/help">Community</a><a class="navbar__item navbar__link" href="/blog">Blog</a><a href="https://github.com/facebook/react-native" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link navbar-github-link" aria-label="GitHub repository"></a><div 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class="container padding-vert--lg docItemWrapper_1Hme"><div class="row"><div class="col docItemCol_2AGf"><div class="alert alert--warning margin-bottom--md" role="alert"><div>This is unreleased documentation for React Native <strong>Next</strong> version.</div><div class="margin-top--md">For up-to-date documentation, see the <strong><a href="/docs/custom-webview-android">latest version</a></strong> (0.63).</div></div><div class="docItemContainer_1tAC"><article><div><span class="badge badge--secondary">Version: Next</span></div><header><h1 class="docTitle_cWlf">Custom WebView</h1></header><div class="markdown"><p>While the built-in web view has a lot of features, it is not possible to handle every use-case in React Native. You can, however, extend the web view with native code without forking React Native or duplicating all the existing web view code.</p><p>Before you do this, you should be familiar with the concepts in <a href="/docs/next/native-components-android">native UI components</a>. You should also familiarise yourself with the <a href="https://github.com/facebook/react-native/blob/master/ReactAndroid/src/main/java/com/facebook/react/views/webview/ReactWebViewManager.java" target="_blank" rel="noopener noreferrer">native code for web views</a>, as you will have to use this as a reference when implementing new features—although a deep understanding is not required.</p><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="native-code"></a>Native Code<a aria-hidden="true" tabindex="-1" class="hash-link" href="#native-code" title="Direct link to heading">#</a></h2><p>To get started, you'll need to create a subclass of <code>ReactWebViewManager</code>, <code>ReactWebView</code>, and <code>ReactWebViewClient</code>. In your view manager, you'll then need to override:</p><ul><li><code>createReactWebViewInstance</code></li><li><code>getName</code></li><li><code>addEventEmitters</code></li></ul><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-java codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token annotation punctuation" style="color:#657b83">@ReactModule</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">name </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewManager</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">REACT_CLASS</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewManager</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebViewManager</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">/* This name must match what we're referring to in JS */</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">final</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> REACT_CLASS </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">"RCTCustomWebView"</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewClient</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebViewClient</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebView</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">ThemedReactContext</span><span class="token plain"> reactContext</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">super</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">reactContext</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebView</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">createReactWebViewInstance</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">ThemedReactContext</span><span class="token plain"> reactContext</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">new</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">reactContext</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getName</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> REACT_CLASS</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">void</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">addEventEmitters</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">ThemedReactContext</span><span class="token plain"> reactContext</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">WebView</span><span class="token plain"> view</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> view</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">setWebViewClient</span><span class="token punctuation" style="color:#657b83">(</span><span class="token keyword" style="color:#c5a5c5">new</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewClient</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><p>You'll need to follow the usual steps to <a href="/docs/next/native-modules-android#register-the-module">register the module</a>.</p><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="adding-new-properties"></a>Adding New Properties<a aria-hidden="true" tabindex="-1" class="hash-link" href="#adding-new-properties" title="Direct link to heading">#</a></h3><p>To add a new property, you'll need to add it to <code>CustomWebView</code>, and then expose it in <code>CustomWebViewManager</code>.</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-java codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewManager</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebViewManager</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">.</span><span class="token punctuation" style="color:#657b83">.</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebView</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">ThemedReactContext</span><span class="token plain"> reactContext</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">super</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">reactContext</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Nullable</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> mFinalUrl</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">void</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">setFinalUrl</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> url</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> mFinalUrl </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> url</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getFinalUrl</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> mFinalUrl</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">.</span><span class="token punctuation" style="color:#657b83">.</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@ReactProp</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">name </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">"finalUrl"</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">void</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">setFinalUrl</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">WebView</span><span class="token plain"> view</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> url</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> view</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">setFinalUrl</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">url</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="adding-new-events"></a>Adding New Events<a aria-hidden="true" tabindex="-1" class="hash-link" href="#adding-new-events" title="Direct link to heading">#</a></h3><p>For events, you'll first need to make create event subclass.</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-java codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token comment" style="color:#93a1a1">// NavigationCompletedEvent.java</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Event</span><span class="token generics punctuation" style="color:#657b83"><</span><span class="token generics class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token generics punctuation" style="color:#657b83">></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">private</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">WritableMap</span><span class="token plain"> mParams</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token keyword" style="color:#c5a5c5">int</span><span class="token plain"> viewTag</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">WritableMap</span><span class="token plain"> params</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">super</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">viewTag</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">this</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">mParams </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> params</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getEventName</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">"navigationCompleted"</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">void</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">dispatch</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">RCTEventEmitter</span><span class="token plain"> rctEventEmitter</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function" style="color:#79b6f2">init</span><span class="token punctuation" style="color:#657b83">(</span><span class="token function" style="color:#79b6f2">getViewTag</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> rctEventEmitter</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">receiveEvent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token function" style="color:#79b6f2">getViewTag</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getEventName</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> mParams</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><p>You can trigger the event in your web view client. You can hook existing handlers if your events are based on them.</p><p>You should refer to <a href="https://github.com/facebook/react-native/blob/master/ReactAndroid/src/main/java/com/facebook/react/views/webview/ReactWebViewManager.java" target="_blank" rel="noopener noreferrer">ReactWebViewManager.java</a> in the React Native codebase to see what handlers are available and how they are implemented. You can extend any methods here to provide extra functionality.</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-java codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Event</span><span class="token generics punctuation" style="color:#657b83"><</span><span class="token generics class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token generics punctuation" style="color:#657b83">></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">private</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">WritableMap</span><span class="token plain"> mParams</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token keyword" style="color:#c5a5c5">int</span><span class="token plain"> viewTag</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">WritableMap</span><span class="token plain"> params</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">super</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">viewTag</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">this</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">mParams </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> params</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getEventName</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">"navigationCompleted"</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">void</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">dispatch</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">RCTEventEmitter</span><span class="token plain"> rctEventEmitter</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function" style="color:#79b6f2">init</span><span class="token punctuation" style="color:#657b83">(</span><span class="token function" style="color:#79b6f2">getViewTag</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> rctEventEmitter</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">receiveEvent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token function" style="color:#79b6f2">getViewTag</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getEventName</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> mParams</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token comment" style="color:#93a1a1">// CustomWebViewManager.java</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">protected</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewClient</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebViewClient</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">boolean</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">shouldOverrideUrlLoading</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">WebView</span><span class="token plain"> view</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> url</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">boolean</span><span class="token plain"> shouldOverride </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">super</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">shouldOverrideUrlLoading</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">view</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> url</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token plain"> finalUrl </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">(</span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> view</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">getFinalUrl</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">if</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token operator" style="color:#fc929e">!</span><span class="token plain">shouldOverride </span><span class="token operator" style="color:#fc929e">&&</span><span class="token plain"> url </span><span class="token operator" style="color:#fc929e">!=</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">null</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">&&</span><span class="token plain"> finalUrl </span><span class="token operator" style="color:#fc929e">!=</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">null</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">&&</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">new</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">String</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">url</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">equals</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">finalUrl</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">final</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">WritableMap</span><span class="token plain"> params </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Arguments</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">createMap</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function" style="color:#79b6f2">dispatchEvent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">view</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">new</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">NavigationCompletedEvent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">view</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">getId</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> params</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> shouldOverride</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><p>Finally, you'll need to expose the events in <code>CustomWebViewManager</code> through <code>getExportedCustomDirectEventTypeConstants</code>. Note that currently, the default implementation returns <code>null</code>, but this may change in the future.</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-java codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebViewManager</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">ReactWebViewManager</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">.</span><span class="token punctuation" style="color:#657b83">.</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Override</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">public</span><span class="token plain"> </span><span class="token annotation punctuation" style="color:#657b83">@Nullable</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Map</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getExportedCustomDirectEventTypeConstants</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Map</span><span class="token generics punctuation" style="color:#657b83"><</span><span class="token generics class-name" style="color:#fac863">String</span><span class="token generics punctuation" style="color:#657b83">,</span><span class="token generics"> </span><span class="token generics class-name" style="color:#fac863">Object</span><span class="token generics punctuation" style="color:#657b83">></span><span class="token plain"> export </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">super</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">getExportedCustomDirectEventTypeConstants</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">if</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">export </span><span class="token operator" style="color:#fc929e">==</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">null</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> export </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">MapBuilder</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">newHashMap</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> export</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">put</span><span class="token punctuation" style="color:#657b83">(</span><span class="token string" style="color:#8dc891">"navigationCompleted"</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">MapBuilder</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">of</span><span class="token punctuation" style="color:#657b83">(</span><span class="token string" style="color:#8dc891">"registrationName"</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">"onNavigationCompleted"</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> export</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="javascript-interface"></a>JavaScript Interface<a aria-hidden="true" tabindex="-1" class="hash-link" href="#javascript-interface" title="Direct link to heading">#</a></h2><p>To use your custom web view, you'll need to create a class for it. Your class must:</p><ul><li>Export all the prop types from <code>WebView.propTypes</code></li><li>Return a <code>WebView</code> component with the prop <code>nativeConfig.component</code> set to your native component (see below)</li></ul><p>To get your native component, you must use <code>requireNativeComponent</code>: the same as for regular custom components. However, you must pass in an extra third argument, <code>WebView.extraNativeComponentConfig</code>. This third argument contains prop types that are only required for native code.</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">import</span><span class="token plain"> React</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> Component</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> PropTypes </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">from</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">'react'</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> WebView</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"> requireNativeComponent </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">from</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">'react-native'</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">export</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">default</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Component</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> propTypes </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> WebView</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">propTypes</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function" style="color:#79b6f2">render</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#657b83"><</span><span class="token tag class-name" style="color:#fac863">WebView</span><span class="token tag" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag" style="color:#fc929e"> </span><span class="token tag spread punctuation" style="color:#657b83">{</span><span class="token tag spread punctuation" style="color:#657b83">...</span><span class="token tag spread attr-value" style="color:#8dc891">this</span><span class="token tag spread punctuation" style="color:#657b83">.</span><span class="token tag spread attr-value" style="color:#8dc891">props</span><span class="token tag spread punctuation" style="color:#657b83">}</span><span class="token tag" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag" style="color:#fc929e"> </span><span class="token tag attr-name" style="color:#c5a5c5">nativeConfig</span><span class="token tag script language-javascript script-punctuation punctuation" style="color:#657b83">=</span><span class="token tag script language-javascript punctuation" style="color:#657b83">{</span><span class="token tag script language-javascript punctuation" style="color:#657b83">{</span><span class="token tag script language-javascript" style="color:#fc929e"> component</span><span class="token tag script language-javascript punctuation" style="color:#657b83">:</span><span class="token tag script language-javascript" style="color:#fc929e"> RCTCustomWebView </span><span class="token tag script language-javascript punctuation" style="color:#657b83">}</span><span class="token tag script language-javascript punctuation" style="color:#657b83">}</span><span class="token tag" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag" style="color:#fc929e"> </span><span class="token tag punctuation" style="color:#657b83">/></span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> RCTCustomWebView </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">requireNativeComponent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token string" style="color:#8dc891">'RCTCustomWebView'</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> CustomWebView</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> WebView</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">extraNativeComponentConfig</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><p>If you want to add custom props to your native component, you can use <code>nativeConfig.props</code> on the web view.</p><p>For events, the event handler must always be set to a function. This means it isn't safe to use the event handler directly from <code>this.props</code>, as the user might not have provided one. The standard approach is to create a event handler in your class, and then invoking the event handler given in <code>this.props</code> if it exists.</p><p>If you are unsure how something should be implemented from the JS side, look at <a href="https://github.com/facebook/react-native/blob/master/Libraries/Components/WebView/WebView.android.js" target="_blank" rel="noopener noreferrer">WebView.android.js</a> in the React Native source.</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">export</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">default</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">class</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">CustomWebView</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">extends</span><span class="token plain"> </span><span class="token class-name" style="color:#fac863">Component</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> propTypes </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token operator" style="color:#fc929e">...</span><span class="token plain">WebView</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">propTypes</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> finalUrl</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> PropTypes</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">string</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> onNavigationCompleted</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> PropTypes</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">func</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> defaultProps </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> finalUrl</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">'about:blank'</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">_onNavigationCompleted</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">event</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> onNavigationCompleted </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">this</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">props</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> onNavigationCompleted </span><span class="token operator" style="color:#fc929e">&&</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">onNavigationCompleted</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">event</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
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</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function" style="color:#79b6f2">render</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#657b83"><</span><span class="token tag class-name" style="color:#fac863">WebView</span><span class="token tag" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag" style="color:#fc929e"> </span><span class="token tag spread punctuation" style="color:#657b83">{</span><span class="token tag spread punctuation" style="color:#657b83">...</span><span class="token tag spread attr-value" style="color:#8dc891">this</span><span class="token tag spread punctuation" style="color:#657b83">.</span><span class="token tag spread attr-value" style="color:#8dc891">props</span><span class="token tag spread punctuation" style="color:#657b83">}</span><span class="token tag" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag" style="color:#fc929e"> </span><span class="token tag attr-name" style="color:#c5a5c5">nativeConfig</span><span class="token tag script language-javascript script-punctuation punctuation" style="color:#657b83">=</span><span class="token tag script language-javascript punctuation" style="color:#657b83">{</span><span class="token tag script language-javascript punctuation" style="color:#657b83">{</span><span class="token tag script language-javascript" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag script language-javascript" style="color:#fc929e"> component</span><span class="token tag script language-javascript punctuation" style="color:#657b83">:</span><span class="token tag script language-javascript" style="color:#fc929e"> RCTCustomWebView</span><span class="token tag script language-javascript punctuation" style="color:#657b83">,</span><span class="token tag script language-javascript" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag script language-javascript" style="color:#fc929e"> props</span><span class="token tag script language-javascript punctuation" style="color:#657b83">:</span><span class="token tag script language-javascript" style="color:#fc929e"> </span><span class="token tag script language-javascript punctuation" style="color:#657b83">{</span><span class="token tag script language-javascript" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag script language-javascript" style="color:#fc929e"> finalUrl</span><span class="token tag script language-javascript punctuation" style="color:#657b83">:</span><span class="token tag script language-javascript" style="color:#fc929e"> </span><span class="token tag script language-javascript keyword" style="color:#c5a5c5">this</span><span class="token tag script language-javascript punctuation" style="color:#657b83">.</span><span class="token tag script language-javascript" style="color:#fc929e">props</span><span class="token tag script language-javascript punctuation" style="color:#657b83">.</span><span class="token tag script language-javascript" style="color:#fc929e">finalUrl</span><span class="token tag script language-javascript punctuation" style="color:#657b83">,</span><span class="token tag script language-javascript" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag script language-javascript" style="color:#fc929e"> onNavigationCompleted</span><span class="token tag script language-javascript punctuation" style="color:#657b83">:</span><span class="token tag script language-javascript" style="color:#fc929e"> </span><span class="token tag script language-javascript keyword" style="color:#c5a5c5">this</span><span class="token tag script language-javascript punctuation" style="color:#657b83">.</span><span class="token tag script language-javascript" style="color:#fc929e">_onNavigationCompleted</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag script language-javascript" style="color:#fc929e"> </span><span class="token tag script language-javascript punctuation" style="color:#657b83">}</span><span class="token tag script language-javascript" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag script language-javascript" style="color:#fc929e"> </span><span class="token tag script language-javascript punctuation" style="color:#657b83">}</span><span class="token tag script language-javascript punctuation" style="color:#657b83">}</span><span class="token tag" style="color:#fc929e"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token tag" style="color:#fc929e"> </span><span class="token tag punctuation" style="color:#657b83">/></span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><p>Similar to regular native components, you must provide all your prop types in the component to have them forwarded on to the native component. However, if you have some prop types that are only used internally in component, you can add them to the <code>nativeOnly</code> property of the third argument previously mentioned. For event handlers, you have to use the value <code>true</code> instead of a regular prop type.</p><p>For example, if you wanted to add an internal event handler called <code>onScrollToBottom</code>, you would use,</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> RCTCustomWebView </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">requireNativeComponent</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token string" style="color:#8dc891">'RCTCustomWebView'</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> CustomWebView</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token operator" style="color:#fc929e">...</span><span class="token plain">WebView</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">extraNativeComponentConfig</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> nativeOnly</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token operator" style="color:#fc929e">...</span><span class="token plain">WebView</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">extraNativeComponentConfig</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">nativeOnly</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> onScrollToBottom</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div></div></article><div class="docMetadata margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/facebook/react-native-website/blob/master/website/../docs/custom-webview-android.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 40 40" style="margin-right:0.3em;vertical-align:sub"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col text--right"><em><small class="docMetadata-updated">Last updated on <time datetime="2020-05-07T13:04:51.000Z" class="docLastUpdatedAt_1gIo">5/7/2020</time></small></em></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"></div><div class="pagination-nav__item pagination-nav__item--next"></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_3iuQ"><ul 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