The DOM: Check if element has a class

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Use the contains method provided by the classList object, which is:

element.classList.contains('myclass')

Technically, classList is an object that satisfies the DOMTokenList interface, which means it implements its methods and properties.

You can see its details on the DOMTokenList MDN page.

Lessons in this unit:

0: Introduction
1: The `window` object
2: The `document` object
3: Types of nodes
4: Traversing the DOM
5: Editing the DOM
6: Selectors API
7: DOM Ready
8: Add a class to an element
9: Remove a class from an element
10: ▶︎ Check if element has a class
11: Change a DOM node value
12: Loop through DOM elements
13: Add an image to the DOM
14: Create a DOM attribute
15: Remove children elements
16: Replace a DOM element
17: insertAdjacentHTML
18: Add click events to a list