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diff --git a/files/zh-cn/orphaned/web/api/parentnode/queryselectorall/index.html b/files/zh-cn/orphaned/web/api/parentnode/queryselectorall/index.html deleted file mode 100644 index 10936dd5d2..0000000000 --- a/files/zh-cn/orphaned/web/api/parentnode/queryselectorall/index.html +++ /dev/null @@ -1,158 +0,0 @@ ---- -title: ParentNode.querySelectorAll() -slug: orphaned/Web/API/ParentNode/querySelectorAll -tags: - - API - - DOM - - Document - - ParentNode - - 参考 - - 方法 - - 查找 - - 选择器 -translation_of: Web/API/ParentNode/querySelectorAll -original_slug: Web/API/ParentNode/querySelectorAll ---- -<div>{{ApiRef("DOM")}}</div> - -<p>The {{domxref("ParentNode")}} mixin defines the <code><strong>querySelectorAll()</strong></code> method 返回一个 {{domxref("NodeList")}} 表示元素的列表，把当前的元素作为根与指定的选择器组相匹配。</p> - -<p>如果你只需要一个结果，可以考虑使用{{domxref("ParentNode.querySelector", "querySelector()")}}方法来代替。</p> - -<div class="note"> -<p><strong>Note:</strong> This method is implemented as {{domxref("Element.querySelectorAll()")}}, {{domxref("Document.querySelectorAll()")}}, and {{domxref("DocumentFragment.querySelectorAll()")}}</p> -</div> - -<h2 id="语法">语法</h2> - -<pre class="syntaxbox notranslate"><var>elementList</var> = <em>parentNode</em>.querySelectorAll(<var>selectors</var>); -</pre> - -<h3 id="参数">参数</h3> - -<dl> - <dt><code>selectors</code></dt> - <dd>一个或多个<a href="/en-US/docs/Web/CSS/CSS_Selectors">CSS选择器</a>，这些选择器由逗号隔开。</dd> - <dd>A {{domxref("DOMString")}} containing one or more selectors to match against. This string must be a valid <a href="/en-US/docs/Web/CSS/CSS_Selectors">CSS selector</a> string; if it's not, a <code>SyntaxError</code> exception is thrown. See <a href="/en-US/docs/Web/API/Document_object_model/Locating_DOM_elements_using_selectors">Locating DOM elements using selectors</a> for more information about using selectors to identify elements. Multiple selectors may be specified by separating them using commas.</dd> -</dl> - -<div class="note"> -<p><strong>Note:</strong> Characters which are not part of standard CSS syntax must be escaped using a backslash character. Since JavaScript also uses backslash escaping, special care must be taken when writing string literals using these characters. See {{anch("Escaping special characters")}} for more information.</p> -</div> - -<h3 id="返回值">返回值</h3> - -<p>一个不存活的 {{domxref("NodeList")}} ，每个子节点拥有一个 {{domxref("Element")}} 对象，其中每个子节点至少与一个选择器相匹配。</p> - -<div class="note"> -<p><strong>Note:</strong> 如果指定的 <code>selectors</code> 包含<a href="/en-US/docs/Web/CSS/Pseudo-elements">CSS pseudo-element</a>，那么返回的列表始终为空。</p> -</div> - -<h3 id="Exceptions">Exceptions</h3> - -<dl> - <dt><code>SyntaxError</code></dt> - <dd>The syntax of the specified <code>selectors</code> string is not valid.</dd> -</dl> - -<h2 id="例子">例子</h2> - -<p>To obtain a {{domxref("NodeList")}} of all of the {{HTMLElement("p")}} elements in the document:</p> - -<pre class="brush: js notranslate">var matches = document.querySelectorAll("p");</pre> - -<p>这个例子返回了所有 class 为 "note" 或者 "alert" 的 div 元素的一个列表:</p> - -<pre class="brush: js notranslate">var matches = document.querySelectorAll("div.note, div.alert");</pre> - -<p>Here, we get a list of <code><p></code> elements whose immediate parent element is a {{domxref("div")}} with the class <code>"highlighted"</code> and which are located inside a container whose ID is <code>"test"</code>.</p> - -<pre class="brush: js notranslate">var container = document.querySelector("#test"); -var matches = container.querySelectorAll("div.highlighted > p");</pre> - -<p>This example uses an <a href="/en-US/docs/Web/CSS/Attribute_selectors">attribute selector</a> to return a list of the {{domxref("iframe")}} elements in the document that contain an attribute named <code>"data-src"</code>:</p> - -<pre class="brush: js notranslate">var matches = document.querySelectorAll("iframe[data-src]");</pre> - -<p>Here, an attribute selector is used to return a list of the list items contained within a list whose ID is <code>"userlist"</code> which have a <code>"data-active"</code> attribute whose value is <code>"1"</code>:</p> - -<pre class="brush: js notranslate">var container = document.querySelector("#userlist"); -var matches = container.querySelectorAll("li[data-active=1]");</pre> - -<h2 id="User_notes">User notes</h2> - -<p><code>querySelectorAll()</code> behaves differently than most common JavaScript DOM libraries, which might lead to unexpected results.</p> - -<h3 id="HTML">HTML</h3> - -<p>Consider this HTML, with its three nested {{HTMLElement("div")}} blocks.</p> - -<pre class="brush: html notranslate"><div class="outer"> - <div class="select"> - <div class="inner"> - </div> - </div> -</div></pre> - -<h3 id="JavaScript">JavaScript</h3> - -<pre class="brush: js notranslate">var select = document.querySelector('.select'); -var inner = select.querySelectorAll('.outer .inner'); -inner.length; // 1, not 0! -</pre> - -<p>In this example, when selecting <code>".outer .inner"</code> in the context the <code><div></code> with the class <code>"select"</code>, the element with the class <code>".inner"</code> is still found, even though <code>.outer</code> is not a descendant of the base element on which the search is performed (<code>".select"</code>). By default, <code>querySelectorAll()</code> only verifies that the last element in the selector is within the search scope.</p> - -<p>The {{cssxref(":scope")}} pseudo-class restores the expected behavior, only matching selectors on descendants of the base element:</p> - -<pre class="brush: js notranslate">var select = document.querySelector('.select'); -var inner = select.querySelectorAll(':scope .outer .inner'); -inner.length; // 0</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("DOM WHATWG", "#dom-parentnode-queryselectorall", "ParentNode.querySelectorAll()")}}</td> - <td>{{Spec2("DOM WHATWG")}}</td> - <td>Living standard</td> - </tr> - <tr> - <td>{{SpecName("Selectors API Level 2", "#dom-parentnode-queryselectorall", "ParentNode.querySelectorAll()")}}</td> - <td>{{Spec2("Selectors API Level 2")}}</td> - <td>No change</td> - </tr> - <tr> - <td>{{SpecName("DOM4", "#dom-parentnode-queryselectorall", "ParentNode.querySelectorAll()")}}</td> - <td>{{Spec2("DOM4")}}</td> - <td>Initial definition</td> - </tr> - <tr> - <td>{{SpecName("Selectors API Level 1", "#interface-definitions", "document.querySelector()")}}</td> - <td>{{Spec2("Selectors API Level 1")}}</td> - <td>Original definition</td> - </tr> - </tbody> -</table> - -<h2 id="浏览器兼容性">浏览器兼容性</h2> - - - -<p>{{Compat("api.ParentNode.querySelectorAll")}}</p> - -<h2 id="参见">参见</h2> - -<ul> - <li><a href="/en-US/docs/Web/API/Document_object_model/Locating_DOM_elements_using_selectors">Locating DOM elements using selectors</a></li> - <li><a href="/en-US/docs/Code_snippets/QuerySelector">Code snippets for <code>querySelector()</code></a></li> - <li><a href="/en-US/docs/Web/CSS/Attribute_selectors">Attribute selectors</a> in the CSS Guide</li> - <li><a href="/en-US/docs/Learn/CSS/Introduction_to_CSS/Attribute_selectors">Attribute selectors</a> in the MDN Learning Area</li> - <li>This method is available as {{domxref("Element.querySelectorAll()")}}, {{domxref("Document.querySelectorAll()")}}, and {{domxref("DocumentFragment.querySelectorAll()")}}</li> -</ul> |