mirror of
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Dan Abramov
530 lines
20 KiB
HTML
530 lines
20 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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<title>Web Components | React</title>
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React
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<a href="https://github.com/facebook/react/wiki/Complementary-Tools" class="external">Complementary Tools</a>
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<a href="https://github.com/facebook/react/wiki/Examples" class="external">Examples</a>
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<h3>Guides</h3>
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<a href="/react/docs/why-react.html">Why React?</a>
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<a href="/react/docs/jsx-gotchas.html">JSX Gotchas</a>
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<a href="/react/docs/interactivity-and-dynamic-uis.html">Interactivity and Dynamic UIs</a>
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<a href="/react/docs/transferring-props.html">Transferring Props</a>
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<a href="/react/docs/forms.html">Forms</a>
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<a href="/react/docs/working-with-the-browser.html">Working With the Browser</a>
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<ul>
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<a href="/react/docs/more-about-refs.html">Refs to Components</a>
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</ul>
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<a href="/react/docs/tooling-integration.html">Tooling Integration</a>
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<ul>
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<a href="/react/docs/language-tooling.html">Language Tooling</a>
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<a href="/react/docs/package-management.html">Package Management</a>
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<a href="/react/docs/environments.html">Server-side Environments</a>
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</ul>
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<a href="/react/docs/addons.html">Add-Ons</a>
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<ul>
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<li>
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<a href="/react/docs/animation.html">Animation</a>
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</li>
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<li>
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<a href="/react/docs/two-way-binding-helpers.html">Two-Way Binding Helpers</a>
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<li>
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<a href="/react/docs/test-utils.html">Test Utilities</a>
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</li>
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<li>
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<a href="/react/docs/clone-with-props.html">Cloning Elements</a>
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<li>
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<a href="/react/docs/create-fragment.html">Keyed Fragments</a>
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<a href="/react/docs/update.html">Immutability Helpers</a>
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<a href="/react/docs/pure-render-mixin.html">PureRenderMixin</a>
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<a href="/react/docs/perf.html">Performance Tools</a>
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<a href="/react/docs/shallow-compare.html">Shallow Compare</a>
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</li>
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</ul>
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</li>
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<li>
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<a href="/react/docs/advanced-performance.html">Advanced Performance</a>
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<li>
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<a href="/react/docs/context.html">Context</a>
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</li>
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</ul>
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</div>
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<div class="nav-docs-section">
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<h3>Reference</h3>
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<ul>
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<li>
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<a href="/react/docs/top-level-api.html">Top-Level API</a>
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</li>
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<li>
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<a href="/react/docs/component-api.html">Component API</a>
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<li>
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<a href="/react/docs/component-specs.html">Component Specs and Lifecycle</a>
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<li>
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<a href="/react/docs/tags-and-attributes.html">Supported Tags and Attributes</a>
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</li>
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<li>
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<a href="/react/docs/events.html">Event System</a>
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</li>
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<li>
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<a href="/react/docs/dom-differences.html">DOM Differences</a>
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</li>
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<li>
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<a href="/react/docs/special-non-dom-attributes.html">Special Non-DOM Attributes</a>
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</li>
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<li>
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<a href="/react/docs/reconciliation.html">Reconciliation</a>
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</li>
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<li>
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<a href="/react/docs/webcomponents.html">Web Components</a>
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</li>
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<li>
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<a href="/react/docs/glossary.html">React (Virtual) DOM Terminology</a>
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</li>
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</ul>
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</div>
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<!-- Tips Nav -->
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<div class="nav-docs-section">
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<h3>Tips</h3>
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<ul>
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<li>
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<a href="/react/tips/introduction.html">Introduction</a>
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</li>
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<li>
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<a href="/react/tips/inline-styles.html">Inline Styles</a>
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</li>
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<li>
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<a href="/react/tips/if-else-in-JSX.html">If-Else in JSX</a>
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</li>
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<li>
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<a href="/react/tips/self-closing-tag.html">Self-Closing Tag</a>
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</li>
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<li>
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<a href="/react/tips/maximum-number-of-jsx-root-nodes.html">Maximum Number of JSX Root Nodes</a>
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</li>
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<li>
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<a href="/react/tips/style-props-value-px.html">Shorthand for Specifying Pixel Values in style props</a>
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</li>
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<li>
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<a href="/react/tips/children-props-type.html">Type of the Children props</a>
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</li>
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<li>
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<a href="/react/tips/controlled-input-null-value.html">Value of null for Controlled Input</a>
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</li>
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<li>
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<a href="/react/tips/componentWillReceiveProps-not-triggered-after-mounting.html">componentWillReceiveProps Not Triggered After Mounting</a>
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</li>
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<li>
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<a href="/react/tips/props-in-getInitialState-as-anti-pattern.html">Props in getInitialState Is an Anti-Pattern</a>
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</li>
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<li>
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<a href="/react/tips/dom-event-listeners.html">DOM Event Listeners in a Component</a>
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</li>
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<li>
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<a href="/react/tips/initial-ajax.html">Load Initial Data via AJAX</a>
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</li>
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<li>
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<a href="/react/tips/false-in-jsx.html">False in JSX</a>
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</li>
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<li>
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<a href="/react/tips/communicate-between-components.html">Communicate Between Components</a>
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</li>
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<li>
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<a href="/react/tips/expose-component-functions.html">Expose Component Functions</a>
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</li>
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<li>
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<a href="/react/tips/children-undefined.html">this.props.children undefined</a>
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</li>
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<li>
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<a href="/react/tips/use-react-with-other-libraries.html">Use React with Other Libraries</a>
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</li>
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<li>
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<a href="/react/tips/dangerously-set-inner-html.html">Dangerously Set innerHTML</a>
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</li>
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</ul>
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</div>
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<!-- Contributing Nav -->
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<div class="nav-docs-section">
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<h3>Contributing</h3>
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<ul>
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<li>
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<a href="/react/contributing/how-to-contribute.html">How to Contribute</a>
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</li>
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<li>
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<a href="/react/contributing/codebase-overview.html">Codebase Overview</a>
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</li>
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<li>
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<a href="/react/contributing/design-principles.html">Design Principles</a>
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</li>
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</ul>
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</div>
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</div>
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<div class="inner-content">
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<a class="edit-page-link" href="https://github.com/facebook/react/tree/master/docs/docs/ref-09-webcomponents.zh-CN.md" target="_blank">Edit on GitHub</a>
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<h1>
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Web Components
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</h1>
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<div class="subHeader"></div>
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<p>因为React和Web组件是用来解决不同问题的, 试图比较两者将不可避免地导致似是而非的结论, 。Web组件为可复用组件提供了强大的封装, 而React则提供了一个使DOM与你的数据同步的声明式库。两者的目标是互补的；工程师可以混合使用这些技术。作为一个开发者，你可以在你的Web组件中使用React，或者在React中使用Web组件，或者两者一起使用。</p>
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<h2><a class="anchor" name="在react中使用web组件"></a>在React中使用Web组件 <a class="hash-link" href="#在react中使用web组件">#</a></h2><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kr">class</span> <span class="nx">HelloMessage</span> <span class="kr">extends</span> <span class="nx">React</span><span class="p">.</span><span class="nx">Component</span><span class="p">{</span>
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<span class="nx">render</span><span class="p">()</span> <span class="p">{</span>
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<span class="k">return</span> <span class="o"><</span><span class="nx">div</span><span class="o">></span><span class="nx">Hello</span> <span class="o"><</span><span class="nx">x</span><span class="o">-</span><span class="nx">search</span><span class="o">></span><span class="p">{</span><span class="k">this</span><span class="p">.</span><span class="nx">props</span><span class="p">.</span><span class="nx">name</span><span class="p">}</span><span class="o"><</span><span class="err">/x-search>!</div>;</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</code></pre></div>
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<blockquote>
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<p>注意:</p>
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<p>两个组件系统的程序模型 (web 组件 与 react 组件) 区别在
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web组件通常暴露一个命令式的API (比如 一个 <code>video</code> web 组件可能暴露 <code>play()</code>
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与 <code>pause()</code> 函数)。 因为web 组件是它们属性的声明式函数,
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他们应该可以执行, 但是如果要访问命令式API的一个web组件, 你将需要在组件上附加一个引用
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并与DOM节点直接交互。如果你在使用第三方web组件,
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我们推荐你写一个React组件作为你的web组件的封装。</p>
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<p>当前，一个由web组件触发的事件可能不能准确地在React渲染树中传递。
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你将需要手动附加event handlers来在你的react组件中处理这些事件。</p>
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</blockquote>
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<h2><a class="anchor" name="在web-组件中使用react"></a>在Web 组件中使用React <a class="hash-link" href="#在web-组件中使用react">#</a></h2><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kd">var</span> <span class="nx">proto</span> <span class="o">=</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">create</span><span class="p">(</span><span class="nx">HTMLElement</span><span class="p">.</span><span class="nx">prototype</span><span class="p">,</span> <span class="p">{</span>
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<span class="nx">attachedCallback</span><span class="o">:</span> <span class="p">{</span>
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<span class="nx">value</span><span class="o">:</span> <span class="kd">function</span><span class="p">()</span> <span class="p">{</span>
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<span class="kd">var</span> <span class="nx">mountPoint</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">createElement</span><span class="p">(</span><span class="s1">'span'</span><span class="p">);</span>
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<span class="k">this</span><span class="p">.</span><span class="nx">createShadowRoot</span><span class="p">().</span><span class="nx">appendChild</span><span class="p">(</span><span class="nx">mountPoint</span><span class="p">);</span>
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<span class="kd">var</span> <span class="nx">name</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">getAttribute</span><span class="p">(</span><span class="s1">'name'</span><span class="p">);</span>
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<span class="kd">var</span> <span class="nx">url</span> <span class="o">=</span> <span class="s1">'https://www.google.com/search?q='</span> <span class="o">+</span> <span class="nb">encodeURIComponent</span><span class="p">(</span><span class="nx">name</span><span class="p">);</span>
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<span class="nx">ReactDOM</span><span class="p">.</span><span class="nx">render</span><span class="p">(</span><span class="o"><</span><span class="nx">a</span> <span class="nx">href</span><span class="o">=</span><span class="p">{</span><span class="nx">url</span><span class="p">}</span><span class="o">></span><span class="p">{</span><span class="nx">name</span><span class="p">}</span><span class="o"><</span><span class="err">/a>, mountPoint);</span>
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<span class="p">}</span>
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<span class="p">}</span>
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<span class="p">});</span>
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<span class="nb">document</span><span class="p">.</span><span class="nx">registerElement</span><span class="p">(</span><span class="s1">'x-search'</span><span class="p">,</span> <span class="p">{</span><span class="nx">prototype</span><span class="o">:</span> <span class="nx">proto</span><span class="p">});</span>
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</code></pre></div><h2><a class="anchor" name="完整样例"></a>完整样例 <a class="hash-link" href="#完整样例">#</a></h2>
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<p>若要查看完整样例，请参照<a href="/react/downloads.html">starter kit</a>中的<code>webcomponents</code>例子。</p>
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A Facebook & Instagram collaboration.<br>
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