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Element: tagName property - Web APIs | MDN
Element: tagName property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The tagName read-only property
of the Element interface returns the tag name of the element on which
it's called.
For example, if the element is an <img>, its
tagName property is IMG (for HTML documents; it may be cased
differently for XML/XHTML documents). Note: You can use the localName property
to access the Element's local name — which for the case in the example is img (lowercase).
Value
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,
tagNamecalled 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 thetagNameproperty's value is"SomeTag".
For Element objects, the value of tagName is the same as
the value of the nodeName property the element object
inherits from Node.
Examples
HTML
html
<span id="born">When I was born…</span>
JavaScript
js
const 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.
Specifications
| Specification |
|---|
| DOM # ref-for-dom-element-tagname① |
Browser compatibility
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