HTML DOM Document getElementsByTagName()
Example
Get all elements with the tag name "li":
const collection = document.getElementsByTagName("li");
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Get all elements in the document:
const collection = document.getElementsByTagName("*");
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Change the inner HTML of the first <p> element in the document:
document.getElementsByTagName("p")[0].innerHTML = "Hello World!";
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More examples below.
Description
The getElementsByTagName() method returns a collection of all elements with a specified tag name.
The getElementsByTagName() method returns an HTMLCollection.
The getElementsByTagName() property is read-only.
Note
getElementsByTagName("*") returns all elements in the document.
HTMLCollection
An HTMLCollection is an array-like collection (list) of HTML elements.
The elements in a collection can be accessed by index (starts at 0).
The length Property returns the number of elements in the collection.
See Also:
Syntax
document.getElementsByTagName(tagname)
Parameters
| Parameter | Description |
| tagname | Required. The tagname of the elements. |
Return Value
| Type | Description |
| Object | An HTMLCollection object. A collection of elements with a specified tag name. The elements are sorted as they appear in the document. |
More Examples
The number of <li> elements in the document:
let numb = document.getElementsByTagName("li").length;
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Change the background color of all <p> elements:
const collection = document.getElementsByTagName("P");
for (let i = 0; i < collection.length; i++) {
collection[i].style.backgroundColor = "red";
}
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Related Pages
JavaScript Reference: element.getElementsByTagName()
JavaScript Tutorial: JavaScript HTML DOM Node List
Browser Support
document.getElementsByTagName() is a DOM Level 1 (1998) feature.
It is fully supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | 9-11 |