ParentNode.querySelectorAll()

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句法
范例
User notes
规范
浏览器兼容性
另请参阅
相关话题

ParentNode mixin defines the querySelectorAll() method as returning a NodeList representing a list of elements matching the specified group of selectors which are descendants of the object on which the method was called.

If you need only a single result, consider the querySelector() method instead.

注意： This method is implemented as Element.querySelectorAll() , Document.querySelectorAll() ，和 DocumentFragment.querySelectorAll()

句法

elementList = parentNode.querySelectorAll(selectors);

参数

selectors: DOMString containing one or more selectors to match against. This string must be a valid CSS selector string; if it's not, a SyntaxError exception is thrown. See 使用选择器定位 DOM 元素 for more information about using selectors to identify elements. Multiple selectors may be specified by separating them using commas.

注意： 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 转义特殊字符了解更多信息。

返回值

A non-live NodeList containing one 元素 object for each descendant node that matches at least one of the specified selectors.

注意： 若指定 selectors include a CSS pseudo-element , the returned list is always empty.

异常

SyntaxError: The syntax of the specified selectors string is not valid.

范例

To obtain a NodeList of all of the <p> elements in the document:

var matches = document.querySelectorAll("p");

This example returns a list of all <div> elements within the document with a class of either note or alert :

var matches = document.querySelectorAll("div.note, div.alert");

Here, we get a list of <p> elements whose immediate parent element is a <div> with the class highlighted and which are located inside a container whose ID is test .

var container = document.querySelector("#test");
var matches = container.querySelectorAll("div.highlighted > p");

This example uses an attribute selector to return a list of the <iframe> elements in the document that contain an attribute named data-src :

var matches = document.querySelectorAll("iframe[data-src]");

Here, an attribute selector is used to return a list of the list items contained within a list whose ID is userlist which have a data-active attribute whose value is 1 :

var container = document.querySelector("#userlist");
var matches = container.querySelectorAll("li[data-active=1]");

User notes

querySelectorAll() behaves differently than most common JavaScript DOM libraries, which might lead to unexpected results.

HTML

Consider this HTML, with its three nested <div> blocks.

<div class="outer">
  <div class="select">
    <div class="inner">
    </div>
  </div>
</div>

JavaScript

var select = document.querySelector('.select');
var inner = select.querySelectorAll('.outer .inner');
inner.length; // 1, not 0!

In this example, when selecting .outer .inner in the context the <div> with the class select , the element with the class .inner is still found, even though .outer is not a descendant of the base element on which the search is performed ( .select ). By default, querySelectorAll() only verifies that the last element in the selector is within the search scope.

:scope pseudo-class restores the expected behavior, only matching selectors on descendants of the base element:

var select = document.querySelector('.select');
var inner = select.querySelectorAll(':scope .outer .inner');
inner.length; // 0

规范

规范	状态	注释
DOM The definition of 'ParentNode.querySelectorAll()' in that specification.	实时标准	Living standard
Selectors API Level 2 The definition of 'ParentNode.querySelectorAll()' in that specification.	过时	无变化
DOM4 The definition of 'ParentNode.querySelectorAll()' in that specification.	过时	初始定义
Selectors API Level 1 在该规范中的 document.querySelector() 定义。	过时	Original definition

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`querySelectorAll`	Chrome 1	Edge 12	Firefox 3.5	IE 9 9 Internet Explorer 8 only supported CSS2 selectors.	Opera 10	Safari 4	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android 10.1	Safari iOS 3.2	Samsung Internet Android Yes

图例

完整支持

另请参阅

使用选择器定位 DOM 元素
Code snippets for querySelector()
Attribute selectors in the CSS Guide
Attribute selectors in the MDN Learning Area
This method is available as Element.querySelectorAll() , Document.querySelectorAll() ，和 DocumentFragment.querySelectorAll()

元数据

最后修改： Feb 7, 2020

DOM (文档对象模型)
ParentNode
特性
方法
1. append()
2. prepend()
3. querySelector()
4. querySelectorAll()
5. replaceChildren()
实现通过：
DOM 相关页面

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句法

参数

返回值

异常

范例

User notes

HTML

JavaScript

规范

浏览器兼容性

图例

另请参阅

相关话题