Element.tagName

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tagName 只读特性在 元素 interface returns the tag name of the element on which it's called. For example, if the element is an <img> , its tagName 特性为 "IMG" (for HTML documents; it may be cased differently for XML/XHTML documents).

句法

elementName = Element.tagName;

值

A string indicating the element's tag name. This string's capitalization depends on the document type:

For DOM trees which represent HTML documents, the returned tag name is always in the canonical upper-case form. For example, tagName called on a <div> element returns "DIV" .
The tag names of elements in an XML DOM tree are returned in the same case in which they're written in the original XML file. If an XML document includes a tag "<SomeTag>" , then the tagName property's value is "SomeTag" .

For 元素 objects, the value of tagName is the same as the value of the nodeName property the element object inherits from 节点 .

范例

HTML

<span id="born">When I was born...</span>

JavaScript

var span = document.getElementById("born");
console.log(span.tagName);

In XHTML (or any other XML format), the original case will be maintained, so "span" would be output in case the original tag name was created lowercase. In HTML, "SPAN" would be output instead regardless of the case used while creating the original document.

规范

规范	状态	注释
DOM The definition of 'Element: tagName' 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
`tagName`	Chrome 43	Edge 12	Firefox 1	IE 8	Opera 8	Safari 6	WebView Android 43	Chrome Android 43	Firefox Android 4	Opera Android 10.1	Safari iOS 6	Samsung Internet Android 4.0

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完整支持

元数据

最后修改： 2019 年 3 月 23 日

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HTML

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