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CSSStyleDeclaration JS Conversion


HTML DOM Document getElementsByTagName() Method

❮ The Document Object

Example

Get all elements with the tag name "li":

const collection = document.getElementsByTagName("li");
Try it Yourself »

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.


Definition and Usage

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 a collection of HTML nodes.

Nodes in a collection can be accessed by index numbers. The index starts at 0.

The length Property returns the number of elements in the collection.



Syntax

document.getElementsByTagName(tagname)

Parameters

Parameter Description
tagname Required.
The tagname of the elements.

Return Value

Type Description
ObjectAn 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";
}
Try it Yourself »

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 IE Edge Firefox Safari Opera
Yes 9-11 Yes Yes Yes Yes

❮ The Document Object