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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: Element.slot
+slug: Web/API/Element/slot
+tags:
+ - API
+ - Element
+ - Experimental
+ - shadow dom
+ - slot
+translation_of: Web/API/Element/slot
+---
+<p>{{APIRef("Shadow DOM")}}</p>
+
+<p>{{domxref("Element")}}接口的<strong><code>slot</code></strong>属性会返回已插入元素所在的Shadow DOM slot的名称。</p>
+
+<p>Slot是存在于<a href="https://developer.mozilla.org/en-US/docs/Web/Web_Components">web component</a>内部的占位符,用户可以通过slot属性在web component的内部插入自定义的标记文本。(详见<a href="https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_templates_and_slots">Using templates and slots</a>)</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">var <em>aString</em> = <em>element</em>.slot
+<em>element</em>.slot = <em>aString</em>
+</pre>
+
+<h3 id="值">值</h3>
+
+<p>{{domxref("DOMString")}}.</p>
+
+<h2 id="示例">示例</h2>
+
+<p>在示例 <a href="https://github.com/mdn/web-components-examples/tree/master/simple-template">simple-template example</a> (<a href="https://mdn.github.io/web-components-examples/simple-template/">在线查看</a>)中,我们创建了一个简单的自定义元素叫做 <code>&lt;my-paragraph&gt;</code> ,并为它添加了shadow root,然后使用一个包含以 <code>my-text</code>为名称的slot的template来填充它。</p>
+
+<p>当 <code>&lt;my-paragraph&gt;</code> 在文档中被使用时,slot标签中的内容会被填充到拥有<code>slot="my-text"</code>属性的元素之中,我们称这种元素为slotable element。(事实上可以看作是拥有slot属性的元素被填充到了template中有<code>&lt;slot&gt;</code>标签存在的地方)请看下面的示例:</p>
+
+<pre class="brush: js">&lt;my-paragraph&gt;
+ &lt;span slot="my-text"&gt;Let's have some different text!&lt;/span&gt;
+&lt;/my-paragraph&gt;</pre>
+
+<p>在Javascript代码中我们获取到上面代码中的span的引用,然后将对应的 <code>&lt;slot&gt;</code> 元素的引用的名称打印在控制台中。</p>
+
+<pre class="brush: js">let slottedSpan = document.querySelector('my-paragraph span')
+console.log(slottedSpan.slot); // logs 'my-text'
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('Shadow DOM','#widl-Element-slot','slot')}}</td>
+ <td>{{Spec2('Shadow DOM')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>{{Compat("api.Element.slot")}}</div>
+
+<div id="compat-mobile"> </div>