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How do I add a class name to an element?

  • Updated

Learn how to add a class name to an element with JavaScript.

 

Read on how to do it in this tutorial: https://www.w3schools.com/howto/howto_js_add_class.asp 

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Try it yourself here: https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_add_class 

 

Tip: Also see How To Toggle A Class.

Tip: Also see How To Remove A Class.

Tip: Learn more about the classList property in our JavaScript Reference.

Tip: Learn more about the className property in our JavaScript Reference.