Please note, this is a STATIC archive of website developer.mozilla.org from 03 Nov 2016, cach3.com does not collect or store any user information, there is no "phishing" involved.

我們的志工尚未將此文章翻譯為 正體中文 (繁體) 版本。加入我們,幫忙翻譯!

Returns the name of the element.

Syntax

elementName = element.tagName;
  • elementName is a string containing the name of the current element.

Notes

In XML (and XML-based languages such as XHTML), tagName preserves case. On HTML elements in DOM trees flagged as HTML documents, tagName returns the element name in the uppercase form. The value of tagName is the same as that of nodeName.

Example

HTML content

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

JavaScript content

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

In XHTML (or any other XML format), "span" would be output. In HTML, "SPAN" would be output instead.

Specifications

Specification Status Comment
Document Object Model (DOM) Level 3 Core Specification
The definition of 'Element.tagName' in that specification.
Recommendation No change
Document Object Model (DOM) Level 2 Core Specification
The definition of 'Element.tagName' in that specification.
Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ?