mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Paul O’Shannessy
575 lines
25 KiB
HTML
575 lines
25 KiB
HTML
<!DOCTYPE html>
|
|
<!--[if IE]><![endif]-->
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
|
|
<title>组件 API | React</title>
|
|
<meta name="viewport" content="width=device-width">
|
|
<meta property="og:title" content="组件 API | React">
|
|
<meta property="og:type" content="website">
|
|
<meta property="og:url" content="https://facebook.github.io/react/docs/component-api-zh-CN.html">
|
|
<meta property="og:image" content="https://facebook.github.io/react/img/logo_og.png">
|
|
<meta property="og:description" content="A JavaScript library for building user interfaces">
|
|
<meta property="fb:app_id" content="623268441017527">
|
|
|
|
<link rel="shortcut icon" href="/react/favicon.ico">
|
|
<link rel="alternate" type="application/rss+xml" title="React" href="https://facebook.github.io/react/feed.xml">
|
|
|
|
<link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css" />
|
|
<link rel="stylesheet" href="/react/css/syntax.css">
|
|
<link rel="stylesheet" href="/react/css/codemirror.css">
|
|
<link rel="stylesheet" href="/react/css/react.css">
|
|
|
|
<script src="//use.typekit.net/vqa1hcx.js"></script>
|
|
<script>try{Typekit.load();}catch(e){}</script>
|
|
|
|
<!--[if lte IE 8]>
|
|
<script src="/react/js/html5shiv.min.js"></script>
|
|
<script src="/react/js/es5-shim.min.js"></script>
|
|
<script src="/react/js/es5-sham.min.js"></script>
|
|
<![endif]-->
|
|
<script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script>
|
|
<script src="/react/js/codemirror.js"></script>
|
|
<script src="/react/js/javascript.js"></script>
|
|
<script src="/react/js/react.js"></script>
|
|
<script src="/react/js/react-dom.js"></script>
|
|
<script src="/react/js/babel-browser.min.js"></script>
|
|
<script src="/react/js/live_editor.js"></script>
|
|
</head>
|
|
<body>
|
|
|
|
<div class="container">
|
|
|
|
<div class="nav-main">
|
|
<div class="wrap">
|
|
<a class="nav-home" href="/react/index.html">
|
|
<img class="nav-logo" src="/react/img/logo.svg" width="36" height="36">
|
|
React
|
|
</a>
|
|
<ul class="nav-site nav-site-internal">
|
|
<li><a href="/react/docs/getting-started.html" class="active">Docs</a></li>
|
|
<li><a href="/react/support.html">Support</a></li>
|
|
<li><a href="/react/downloads.html">Download</a></li>
|
|
<li><a href="/react/blog/">Blog</a></li>
|
|
<li>
|
|
<input id="algolia-doc-search" type="text" placeholder="Search docs..." />
|
|
</li>
|
|
</ul>
|
|
|
|
<ul class="nav-site nav-site-external">
|
|
<li><a href="https://github.com/facebook/react">GitHub</a></li>
|
|
<li><a href="https://facebook.github.io/react-native/">React Native</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
|
|
<section class="content wrap documentationContent">
|
|
<div class="nav-docs">
|
|
<!-- Docs Nav -->
|
|
|
|
<div class="nav-docs-section">
|
|
<h3>Quick Start</h3>
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/getting-started.html">Getting Started</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/tutorial.html">Tutorial</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/thinking-in-react.html">Thinking in React</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
<div class="nav-docs-section">
|
|
<h3>Community Resources</h3>
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/conferences.html">Conferences</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/videos.html">Videos</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="https://github.com/facebook/react/wiki/Complementary-Tools" class="external">Complementary Tools</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="https://github.com/facebook/react/wiki/Examples" class="external">Examples</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
<div class="nav-docs-section">
|
|
<h3>Guides</h3>
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/why-react.html">Why React?</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/displaying-data.html">Displaying Data</a>
|
|
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/jsx-in-depth.html">JSX in Depth</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/jsx-spread.html">JSX Spread Attributes</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/jsx-gotchas.html">JSX Gotchas</a>
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/interactivity-and-dynamic-uis.html">Interactivity and Dynamic UIs</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/multiple-components.html">Multiple Components</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/reusable-components.html">Reusable Components</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/transferring-props.html">Transferring Props</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/forms.html">Forms</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/working-with-the-browser.html">Working With the Browser</a>
|
|
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/more-about-refs.html">Refs to Components</a>
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/tooling-integration.html">Tooling Integration</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/addons.html">Add-Ons</a>
|
|
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/animation.html">Animation</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/two-way-binding-helpers.html">Two-Way Binding Helpers</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/test-utils.html">Test Utilities</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/clone-with-props.html">Cloning Elements</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/create-fragment.html">Keyed Fragments</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/update.html">Immutability Helpers</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/pure-render-mixin.html">PureRenderMixin</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/perf.html">Performance Tools</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/shallow-compare.html">Shallow Compare</a>
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/advanced-performance.html">Advanced Performance</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/context.html">Context</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
<div class="nav-docs-section">
|
|
<h3>Reference</h3>
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/docs/top-level-api.html">Top-Level API</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/component-api.html">Component API</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/component-specs.html">Component Specs and Lifecycle</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/tags-and-attributes.html">Supported Tags and Attributes</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/events.html">Event System</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/dom-differences.html">DOM Differences</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/special-non-dom-attributes.html">Special Non-DOM Attributes</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/reconciliation.html">Reconciliation</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/webcomponents.html">Web Components</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/docs/glossary.html">React (Virtual) DOM Terminology</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
<div class="nav-docs-section">
|
|
<h3>Flux</h3>
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="https://facebook.github.io/flux/docs/overview.html" class="external">Flux Overview</a>
|
|
|
|
</li>
|
|
|
|
<li>
|
|
<a href="https://facebook.github.io/flux/docs/todo-list.html" class="external">Flux TodoMVC Tutorial</a>
|
|
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
|
|
<!-- Tips Nav -->
|
|
|
|
<div class="nav-docs-section">
|
|
<h3>Tips</h3>
|
|
<ul>
|
|
|
|
<li>
|
|
<a href="/react/tips/introduction.html">Introduction</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/inline-styles.html">Inline Styles</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/if-else-in-JSX.html">If-Else in JSX</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/self-closing-tag.html">Self-Closing Tag</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/maximum-number-of-jsx-root-nodes.html">Maximum Number of JSX Root Nodes</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/style-props-value-px.html">Shorthand for Specifying Pixel Values in style props</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/children-props-type.html">Type of the Children props</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/controlled-input-null-value.html">Value of null for Controlled Input</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/componentWillReceiveProps-not-triggered-after-mounting.html">componentWillReceiveProps Not Triggered After Mounting</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/props-in-getInitialState-as-anti-pattern.html">Props in getInitialState Is an Anti-Pattern</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/dom-event-listeners.html">DOM Event Listeners in a Component</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/initial-ajax.html">Load Initial Data via AJAX</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/false-in-jsx.html">False in JSX</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/communicate-between-components.html">Communicate Between Components</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/expose-component-functions.html">Expose Component Functions</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/children-undefined.html">this.props.children undefined</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/use-react-with-other-libraries.html">Use React with Other Libraries</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="/react/tips/dangerously-set-inner-html.html">Dangerously Set innerHTML</a>
|
|
</li>
|
|
|
|
</ul>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
|
|
<div class="inner-content">
|
|
<h1>
|
|
组件 API
|
|
<a class="edit-page-link" href="https://github.com/facebook/react/tree/master/docs/docs/ref-02-component-api.zh-CN.md" target="_blank">Edit on GitHub</a>
|
|
</h1>
|
|
<div class="subHeader"></div>
|
|
|
|
<h2><a class="anchor" name="react.component"></a>React.Component <a class="hash-link" href="#react.component">#</a></h2>
|
|
<p>当渲染时，React 组件的实例在 React 内部被创建。这些实例在随后的渲染中被重复使用，并可以在组件方法中通过 <code>this</code> 访问。唯一的在 React 之外获取 React 组件实例句柄的方法是保存 <code>ReactDOM.render</code> 的返回值。在其它组件内，你可以使用 <a href="/react/docs/more-about-refs-zh-CN.html">refs</a> 得到相同的结果。</p>
|
|
<h3><a class="anchor" name="setstate"></a>setState <a class="hash-link" href="#setstate">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="k">void</span> <span class="nx">setState</span><span class="p">(</span>
|
|
<span class="kd">function</span><span class="o">|</span><span class="nx">object</span> <span class="nx">nextState</span><span class="p">,</span>
|
|
<span class="p">[</span><span class="kd">function</span> <span class="nx">callback</span><span class="p">]</span>
|
|
<span class="p">)</span>
|
|
</code></pre></div>
|
|
<p>执行一个 nextState 到当前 state 的浅合并。这是你从事件处理器和服务器请求回调用来触发 UI 更新的主要手段。</p>
|
|
|
|
<p>第一个参数可以是一个对象（包含0或者多个keys来更新）或者一个（state 和 props的）函数，它返回一个包含要更新的keys的对象。</p>
|
|
|
|
<p>这里是一个简单的运用:</p>
|
|
<div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">setState</span><span class="p">({</span><span class="nx">mykey</span><span class="o">:</span> <span class="s1">'my new value'</span><span class="p">});</span>
|
|
</code></pre></div>
|
|
<p>也可以以 <code>function(state, props)</code> 传递一个函数。当你想要把一个在设置任何值之前参考前一次 state+props 的值的原子更新放在队列中 这会有很用。例如，假如我们想在 state 增加一个值:</p>
|
|
<div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">setState</span><span class="p">(</span><span class="kd">function</span><span class="p">(</span><span class="nx">previousState</span><span class="p">,</span> <span class="nx">currentProps</span><span class="p">)</span> <span class="p">{</span>
|
|
<span class="k">return</span> <span class="p">{</span><span class="nx">myInteger</span><span class="o">:</span> <span class="nx">previousState</span><span class="p">.</span><span class="nx">myInteger</span> <span class="o">+</span> <span class="mi">1</span><span class="p">};</span>
|
|
<span class="p">});</span>
|
|
</code></pre></div>
|
|
<p>第二个（可选）的参数是一个将会在 <code>setState</code> 完成和组件被重绘后执行的回调函数。</p>
|
|
|
|
<blockquote>
|
|
<p>注意:</p>
|
|
|
|
<p><em>绝对不要</em> 直接改变 <code>this.state</code>，因为之后调用 <code>setState()</code> 可能会替换掉你做的改变。把 <code>this.state</code> 当做是不可变的。</p>
|
|
|
|
<p><code>setState()</code> 不会立刻改变 <code>this.state</code>，而是创建一个即将处理的 state 转变。在调用该方法之后访问 <code>this.state</code> 可能会返回现有的值。</p>
|
|
|
|
<p>对 <code>setState</code> 的调用没有任何同步性的保证，并且调用可能会为了性能收益批量执行。</p>
|
|
|
|
<p><code>setState()</code> 将总是触发一次重绘，除非在 <code>shouldComponentUpdate()</code> 中实现了条件渲染逻辑。如果可变对象被使用了，但又不能在 <code>shouldComponentUpdate()</code> 中实现这种逻辑，仅在新 state 和之前的 state 存在差异的时候调用 <code>setState()</code> 可以避免不必要的重新渲染。</p>
|
|
</blockquote>
|
|
<h3><a class="anchor" name="replacestate"></a>replaceState <a class="hash-link" href="#replacestate">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="k">void</span> <span class="nx">replaceState</span><span class="p">(</span>
|
|
<span class="nx">object</span> <span class="nx">nextState</span><span class="p">,</span>
|
|
<span class="p">[</span><span class="kd">function</span> <span class="nx">callback</span><span class="p">]</span>
|
|
<span class="p">)</span>
|
|
</code></pre></div>
|
|
<p>类似于 <code>setState()</code>，但是删除任何 先前存在但不在 nextState 里的 state 键。</p>
|
|
|
|
<blockquote>
|
|
<p>注意:</p>
|
|
|
|
<p>这个方法在从 <code>React.Component</code> 扩展的 ES6 <code>class</code> 组件里不可用。它也许会在未来的 React 版本中被完全移除。</p>
|
|
</blockquote>
|
|
<h3><a class="anchor" name="forceupdate"></a>forceUpdate <a class="hash-link" href="#forceupdate">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="k">void</span> <span class="nx">forceUpdate</span><span class="p">(</span>
|
|
<span class="p">[</span><span class="kd">function</span> <span class="nx">callback</span><span class="p">]</span>
|
|
<span class="p">)</span>
|
|
</code></pre></div>
|
|
<p>默认情况下，当你的组件的 state 或者 props 改变，你的组件将会重绘。然而，如果它们隐式的改变（例如：在对象深处的数据改变了但没有改变对象本身）或者如果你的 <code>render()</code> 方法依赖于其他的数据，你可以用调用 <code>forceUpdate()</code> 来告诉 React 它需要重新运行 <code>render()</code>。</p>
|
|
|
|
<p>调用 <code>forceUpdate()</code> 将会导致 <code>render()</code> 跳过 <code>shouldComponentUpdate()</code> 在组件上被调用，这会为子级触发正常的生命周期方法。包括每个子级的 <code>shouldComponentUpdate()</code> 方法。如果标记改变了，React 仍仅只更新 DOM。</p>
|
|
|
|
<p>通常你应该试着避免所有对 <code>forceUpdate()</code> 的使用并且在 <code>render()</code> 里只从 <code>this.props</code> 和 <code>this.state</code> 读取。这会使你的组件 "纯粹" 并且你的组件会更简单和高效。</p>
|
|
<h3><a class="anchor" name="getdomnode"></a>getDOMNode <a class="hash-link" href="#getdomnode">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">DOMElement</span> <span class="nx">getDOMNode</span><span class="p">()</span>
|
|
</code></pre></div>
|
|
<p>如果这个组件已经被挂载到了 DOM，它返回相应的浏览器原生的 DOM 元素。这个方法对于读取 DOM 的值很有用，比如表单域的值和执行 DOM 的测量。如果 <code>render</code> 返回 <code>null</code> 或者 <code>false</code> 的时候，<code>this.getDOMNode()</code> 返回 <code>null</code>。</p>
|
|
|
|
<blockquote>
|
|
<p>Note:</p>
|
|
|
|
<p>getDOMNode 被废弃了，已经被 [ReactDOM.findDOMNode()] 替换(/react/docs/top-level-api-zh-CN.html#reactdom.finddomnode).</p>
|
|
|
|
<p>这个方法在从 <code>React.Component</code> 扩展的 ES6 <code>class</code> 组件里不可用。它也许会在未来的 React 版本中被完全移除。</p>
|
|
</blockquote>
|
|
<h3><a class="anchor" name="ismounted"></a>isMounted <a class="hash-link" href="#ismounted">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">isMounted</span><span class="p">()</span>
|
|
</code></pre></div>
|
|
<p>如果组件渲染到了 DOM 中，<code>isMounted()</code> 返回 true，否则返回 <code>false</code>。可以使用该方法来控制对 <code>setState()</code> 和 <code>forceUpdate()</code> 的异步调用。</p>
|
|
|
|
<blockquote>
|
|
<p>注意:</p>
|
|
|
|
<p>这个方法在从 <code>React.Component</code> 扩展的 ES6 <code>class</code> 组件里不可用。它也许会在未来的 React 版本中被完全移除,所以你也要移除它 <a href="/react/blog/2015/12/16/ismounted-antipattern.html">start migrating away from isMounted() now</a></p>
|
|
</blockquote>
|
|
<h3><a class="anchor" name="setprops"></a>setProps <a class="hash-link" href="#setprops">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="k">void</span> <span class="nx">setProps</span><span class="p">(</span>
|
|
<span class="nx">object</span> <span class="nx">nextProps</span><span class="p">,</span>
|
|
<span class="p">[</span><span class="kd">function</span> <span class="nx">callback</span><span class="p">]</span>
|
|
<span class="p">)</span>
|
|
</code></pre></div>
|
|
<p>当和一个外部的 JavaScript 应用整合的时候，你也许会想用 <code>ReactDOM.render()</code> 给 React 组件标示一个改变。</p>
|
|
|
|
<p>在根组件上调用 <code>setProps()</code> 会改变他的属性并触发一次重绘。另外，你可以提供一个可选的回调函数，一旦 <code>setProps</code> 完成并且组件被重绘它就执行。</p>
|
|
|
|
<blockquote>
|
|
<p>注意:</p>
|
|
|
|
<p>这个方法被弃用了并会很快移除.这个方法在从 <code>React.Component</code> 扩展的 ES6 <code>class</code> 组件里不可用. 取代调用 <code>setProps</code>,试着以新的 props 再次调用 <code>ReactDOM.render()</code>. 更多的注意事项,见我们的<a href="/react/blog/2015/10/01/react-render-and-top-level-api.html">blog post about using the Top Level API</a></p>
|
|
|
|
<p>如果可能，上述的在同一个节点上再次调用 <code>ReactDOM.render()</code> 的方法是优先替代的。它往往使更新更容易理解。（两种方法并没有显著的性能区别。）</p>
|
|
|
|
<p>这个方法仅能在根组件上被调用。也就是说，它仅在直接传给 <code>ReactDOM.render()</code> 的组件上可用，在它的子级上不可用。如果你倾向于在子组件上使用 <code>setProps()</code>，不要利用响应式更新，而是当子组件在 <code>render()</code> 中创建的时候传入新的 prop 到子组件中。</p>
|
|
</blockquote>
|
|
<h3><a class="anchor" name="replaceprops"></a>replaceProps <a class="hash-link" href="#replaceprops">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="k">void</span> <span class="nx">replaceProps</span><span class="p">(</span>
|
|
<span class="nx">object</span> <span class="nx">nextProps</span><span class="p">,</span>
|
|
<span class="p">[</span><span class="kd">function</span> <span class="nx">callback</span><span class="p">]</span>
|
|
<span class="p">)</span>
|
|
</code></pre></div>
|
|
<p>类似于 <code>setProps()</code>，但是删除任何先前存在的 props，而不是合并这两个对象。</p>
|
|
|
|
<blockquote>
|
|
<p>注意:</p>
|
|
|
|
<p>这个方法被弃用了并会很快移除.这个方法在从 <code>React.Component</code> 扩展的 ES6 <code>class</code> 组件里不可用. 取代调用 <code>replaceProps</code>,试着以新的 props 再次调用 <code>ReactDOM.render()</code>. 更多的注意事项,见我们的<a href="/react/blog/2015/10/01/react-render-and-top-level-api.html">blog post about using the Top Level API</a></p>
|
|
</blockquote>
|
|
|
|
|
|
<div class="docs-prevnext">
|
|
|
|
<a class="docs-prev" href="/react/docs/top-level-api-zh-CN.html">← Prev</a>
|
|
|
|
|
|
<a class="docs-next" href="/react/docs/component-specs-zh-CN.html">Next →</a>
|
|
|
|
</div>
|
|
</div>
|
|
</section>
|
|
|
|
|
|
<footer class="wrap">
|
|
<div class="left">
|
|
A Facebook & Instagram collaboration.<br>
|
|
<a href="/react/acknowledgements.html">Acknowledgements</a>
|
|
</div>
|
|
<div class="right">
|
|
© 2013–2016 Facebook Inc.<br>
|
|
Documentation licensed under <a href="https://creativecommons.org/licenses/by/4.0/">CC BY 4.0</a>.
|
|
</div>
|
|
</footer>
|
|
</div>
|
|
<div id="fb-root"></div>
|
|
|
|
<script>
|
|
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
|
|
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
|
|
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
|
|
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
|
|
ga('create', 'UA-41298772-1', 'facebook.github.io');
|
|
ga('send', 'pageview');
|
|
|
|
!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="https://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");
|
|
|
|
(function(d, s, id) {
|
|
var js, fjs = d.getElementsByTagName(s)[0];
|
|
if (d.getElementById(id)) return;
|
|
js = d.createElement(s); js.id = id;
|
|
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1&appId=623268441017527";
|
|
fjs.parentNode.insertBefore(js, fjs);
|
|
}(document, 'script', 'facebook-jssdk'));
|
|
|
|
docsearch({
|
|
apiKey: '36221914cce388c46d0420343e0bb32e',
|
|
indexName: 'react',
|
|
inputSelector: '#algolia-doc-search'
|
|
});
|
|
</script>
|
|
</body>
|
|
</html>
|