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HTML DOM getElementsByTagName() Method

❮ Element Object

Example

Change the HTML content of the first <li> element (index 0) in a list:

var list = document.getElementsByTagName("UL")[0];
list.getElementsByTagName("LI")[0].innerHTML = "Milk";
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Definition and Usage

The getElementsByTagName() method returns a collection of an elements's child elements with the specified tag name, as a NodeList object.

The NodeList object represents a collection of nodes. The nodes can be accessed by index numbers. The index starts at 0.

Tip: You can use the length property of the NodeList object to determine the number of child nodes with the specified tag name, then you can loop through all nodes and extract the info you want.

Tip: The parametervalue "*" returns all of the element's child elements.


Browser Support

The numbers in the table specifies the first browser version that fully supports the method.

Method
getElementsByTagName() 1.0 6.0 3.0 3.0 9.5

Syntax

element.getElementsByTagName(tagname)

Parameter Values

Parameter Type Description
tagname String Required. The tagname of the child elements you want to get


Technical Details

DOM Version Core Level 1 Element Object
Return Value: A NodeList object, representing a collection of the element's child elements with the specified tagname. The elements in the returned collection are sorted as they appear in the source code.

More Examples

Example

Find out how many <p> elements there are inside a <div> element (using the length property of the NodeList object):

var x = document.getElementById("myDIV").getElementsByTagName("P").length;
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Example

Change the background color of the second <p> element (index 1) inside a <div> element:

var x = document.getElementById("myDIV");
x.getElementsByTagName("P")[1].style.backgroundColor = "red";
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Example

Change the background color of all <p> elements inside a <div> element:

var x = document.getElementById("myDIV");
var y = x.getElementsByTagName("P");
var i;
for (i = 0; i < y.length; i++) {
  y[i].style.backgroundColor = "red";
}
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Example

Change the background color of the fourth element (index 3) inside a <div> element:

var x = document.getElementById("myDIV");
x.getElementsByTagName("*")[3].style.backgroundColor = "red";
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Example

Using the "*" parameter.

Change the background color of all elements inside a <div> element:

var x = document.getElementById("myDIV");
var y = x.getElementsByTagName("*");
var i;
for (i = 0; i < y.length; i++) {
  y[i].style.backgroundColor = "red";
}
Try it Yourself »

Related Pages

JavaScript Reference: document.getElementsByTagName()

JavaScript Tutorial: JavaScript HTML DOM Node List


❮ Element Object