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diff --git a/files/zh-cn/web/api/childnode/before/index.html b/files/zh-cn/web/api/childnode/before/index.html deleted file mode 100644 index a09c552459..0000000000 --- a/files/zh-cn/web/api/childnode/before/index.html +++ /dev/null @@ -1,187 +0,0 @@ ---- -title: ChildNode.before() -slug: Web/API/ChildNode/before -tags: - - api、dom、节点、方法 -translation_of: Web/API/ChildNode/before ---- -<div>{{APIRef("DOM")}} {{SeeCompatTable}}</div> - -<p> <code><strong>ChildNode</strong></code><strong><code>.before</code></strong> 方法可以在<code>ChildNode这个节点的父节点中插入一些列的</code> {{domxref("Node")}} 或者 {{domxref("DOMString")}} 对象，位置就是在<code>ChildNode节点的前面，</code>{{domxref("DOMString")}} 对象其实和 {{domxref("Text")}}节点一样的方式来完成插入的。</p> - -<h2 id="语法">语法</h2> - -<pre class="syntaxbox">[Throws, Unscopable] -void ChildNode.before((Node or DOMString)... nodes); -</pre> - -<h3 id="Parameters参数">Parameters参数</h3> - -<dl> - <dt><code>nodes</code></dt> - <dd>一系列的 {{domxref("Node")}} 或者 {{domxref("DOMString")}} </dd> -</dl> - -<h3 id="Exceptions">Exceptions</h3> - -<ul> - <li>{{domxref("HierarchyRequestError")}}: 当节点插入了错误的层级就会出现报错，需要遵循html标签的层级关系，</li> -</ul> - -<h2 id="Examples事例">Examples事例</h2> - -<h3 id="Inserting_an_element插入元素节点">Inserting an element插入元素节点</h3> - -<pre class="brush: js">var parent = document.createElement("div"); -var child = document.createElement("p"); -parent.appendChild(child); -var span = document.createElement("span"); - -child.before(span); - -console.log(parent.outerHTML); -// "<div><span></span><p></p></div>" -</pre> - -<h3 id="Inserting_text插入文本节点">Inserting text插入文本节点</h3> - -<pre class="brush: js">var parent = document.createElement("div"); -var child = document.createElement("p"); -parent.appendChild(child); - -child.before("Text"); - -console.log(parent.outerHTML); -// "<div>Text<p></p></div>"</pre> - -<h3 id="Inserting_an_element_and_text同时插入文本和元素">Inserting an element and text同时插入文本和元素</h3> - -<pre class="brush: js">var parent = document.createElement("div"); -var child = document.createElement("p"); -parent.appendChild(child); -var span = document.createElement("span"); - -child.before(span, "Text"); - -console.log(parent.outerHTML); -// "<div><span></span>Text<p></p></div>"</pre> - -<h3 id="ChildNode.before()_is_unscopable不可使用区域"><code>ChildNode.before()</code> is unscopable不可使用区域</h3> - -<p>The <code>before()</code> 不能配合with声明使用，See {{jsxref("Symbol.unscopables")}} for more information.</p> - -<pre class="brush: js">with(node) { - before("foo"); -} -// ReferenceError: before is not defined </pre> - -<h2 id="Polyfill">Polyfill</h2> - -<p>兼容ie9或者更高版本的方法，You can polyfill the <code>before() method</code> in Internet Explorer 9 and higher with the following code:</p> - -<pre class="brush: js">// from: https://github.com/jserz/js_piece/blob/master/DOM/ChildNode/before()/before().md -(function (arr) { - arr.forEach(function (item) { - if (item.hasOwnProperty('before')) { - return; - } - Object.defineProperty(item, 'before', { - configurable: true, - enumerable: true, - writable: true, - value: function before() { - var argArr = Array.prototype.slice.call(arguments), - docFrag = document.createDocumentFragment(); - - argArr.forEach(function (argItem) { - var isNode = argItem instanceof Node; - docFrag.appendChild(isNode ? argItem : document.createTextNode(String(argItem))); - }); - - this.parentNode.insertBefore(docFrag, this); - } - }); - }); -})([Element.prototype, CharacterData.prototype, DocumentType.prototype]);</pre> - -<h2 id="Specification">Specification</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('DOM WHATWG', '#dom-childnode-before', 'ChildNode.before()')}}</td> - <td>{{Spec2('DOM WHATWG')}}</td> - <td>Initial definition.</td> - </tr> - </tbody> -</table> - -<h2 id="Browser_compatibility">Browser compatibility</h2> - -<p>{{CompatibilityTable}}</p> - -<div id="compat-desktop"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Chrome</th> - <th>Firefox (Gecko)</th> - <th>Internet Explorer</th> - <th>Opera</th> - <th>Safari</th> - </tr> - <tr> - <td>Basic support</td> - <td>{{CompatChrome(54.0)}}</td> - <td>{{CompatGeckoDesktop(49)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatOpera(39)}}</td> - <td>{{CompatUnknown}}</td> - </tr> - </tbody> -</table> -</div> - -<div id="compat-mobile"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Android</th> - <th>Android Webview</th> - <th>Firefox Mobile (Gecko)</th> - <th>IE Mobile</th> - <th>Opera Mobile</th> - <th>Safari Mobile</th> - <th>Chrome for Android</th> - </tr> - <tr> - <td>Basic support</td> - <td>{{CompatNo}}</td> - <td>{{CompatChrome(54.0)}}</td> - <td>{{CompatGeckoMobile(49)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatOpera(39)}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatChrome(54.0)}}</td> - </tr> - </tbody> -</table> -</div> - -<h2 id="See_also">See also</h2> - -<ul> - <li>{{domxref("ChildNode")}} and {{domxref("ParentNode")}}</li> - <li>{{domxref("ChildNode.after()")}}</li> - <li>{{domxref("ParentNode.append()")}}</li> - <li>{{domxref("Node.appendChild()")}}</li> - <li>{{domxref("Node.insertBefore()")}}</li> - <li>{{domxref("NodeList")}}</li> -</ul> |