HTML DOM Element ClassList Property - W3Schools

HTML DOM Element classList ❮ Previous ❮ Element Object Reference Next ❯

Example

Add a "myStyle" class to an element:

const list = element.classList; list.add("myStyle"); Try it Yourself »

Remove the "myStyle" class from an element:

const list = element.classList; list.remove("myStyle"); Try it Yourself »

Toggle "myStyle" on and off:

const list = element.classList; list.toggle("myStyle"); Try it Yourself »

More examples below.

Description

The classList property returns the CSS classnames of an element.

The classList property returns a DOMTokenList.

See Also:

The DOMTokenList Object

The className Property

The getElementsByClassName() Method

The HTML DOM Style Object

Syntax

element.classList

Return Value

Type	Description
Object	A DOMTokenList. A list of the class names of an element.

Note

The classList property is read-only, but you can use the methods listed below, to add, toggle or remove CSS classes from the list:

classList Properties and Methods

Name	Description
add()	Adds one or more tokens to the list
contains()	Returns true if the list contains a class
entries()	Returns an Iterator with key/value pairs from the list
forEach()	Executes a callback function for each token in the list
item()	Returns the token at a specified index
keys()	Returns an Iterator with the keys in the list
length	Returns the number of tokens in the list
remove()	Removes one or more tokens from the list
replace()	Replaces a token in the list
supports()	Returns true if a token is one of an attribute's supported tokens
toggle()	Toggles between tokens in the list
value	Returns the token list as a string
values()	Returns an Iterator with the values in the list

More Examples

Add multiple classes to the an element:

element.classList.add("myStyle", "anotherClass", "thirdClass"); Try it Yourself »

Remove multiple classes from an element:

element.classList.remove("myStyle", "anotherClass", "thirdClass"); Try it Yourself »

How many class names the element have:

let numb = element.classList.length; Try it Yourself »

Get the class names of the "myDIV" element:

<div id="myDIV" class="myStyle anotherClass thirdClass"> <p>I am myDIV.</p> </div> const list = document.getElementById("myDIV").classList; Try it Yourself »

Get the first class of an element:

let className = element.classList.item(0); Try it Yourself »

Does an an element has a "myStyle" class?

let x = element.classList.contains("myStyle"); Try it Yourself »

Remove "anotherClass" if an element has a "myStyle" class.

if (element.classList.contains("mystyle")) { element.classList.remove("anotherClass"); } Try it Yourself »

Toggle between classes to create a dropdown button:

document.getElementById("myBtn").onclick = function() {myFunction()}; function myFunction() { document.getElementById("myDropdown").classList.toggle("show");} Try it Yourself »

Create a sticky navigation bar:

// Get the navbarconst navbar = document.getElementById("navbar");// Get the offset position of the navbarconst sticky = navbar.offsetTop; // Add the sticky class to the navbar when you reach its scroll position // Remove it when you leave the scroll positionfunction myFunction() { if (window.pageYOffset >= sticky) { navbar.classList.add("sticky") } else { navbar.classList.remove("sticky"); } } Try it Yourself »

Related Pages

CSS Tutorial: CSS Syntax

CSS Reference: CSS .class Selector

Browser Support

element.classList is supported in all browsers:

Chrome	IE	Edge	Firefox	Safari	Opera
Yes	10-11	Yes	Yes	Yes	Yes

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