NodeList.item()

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句法
Alternate Syntax
范例
规范
浏览器兼容性
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Returns a node from a NodeList by index. This method doesn't throw exceptions as long as you provide arguments. A value of null is returned if the index is out of range, and a TypeError is thrown if no argument is provided.

句法

nodeItem = nodeList.item(index)

nodeList 是 NodeList . This is usually obtained from another DOM property or method, such as childNodes .
index is the index of the node to be fetched. The index is zero-based.
nodeItem 是 index th node in the nodeList 返回通过 item 方法。

Alternate Syntax

JavaScript also offers an array-like bracketed syntax for obtaining an item from a NodeList by index:

nodeItem = nodeList[index]

范例

var tables = document.getElementsByTagName("table");
var firstTable = tables.item(1); // or simply tables[1] - returns the second table in the DOM

规范

规范	状态	注释
DOM The definition of 'NodeList: item' in that specification.	实时标准

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
`item`	Chrome 1	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持
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元数据

最后修改： Jan 9, 2020

DOM (文档对象模型)
NodeList
特性
1. length
方法
1. entries()
2. forEach()
3. item()
4. keys()
5. values()
DOM 相关页面

在此页

句法

Alternate Syntax

范例

规范

浏览器兼容性

图例

相关话题