How to add class in javascript

How to add class in javascript: 1. Create a p element; 2. Use "<script>document.getelementbyid("aa").classname="bbbb";</script>" Just add a class to the element.

The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.

How to add a class in javascript?

First we create a p element and write hello in it:

The display on the browser interface is as follows:

Next, you can use js to add a class to the element:

After adding it, let us see the result in the browser console:

Isn’t it very simple? After adding it, you can use class to It is very convenient to add some styles dynamically. After removing them, the styles will be gone.

Recommended study: "javascript basic tutorial"

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