javascript set class name
Step 1 Add HTML. Watch a video course JavaScript - The Complete Guide Beginner Advanced documentgetElementById My_ElementclassName My_Class.
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Let value documentgetElementByIdmyDIVclassName.
. If elementclassName myStyle. Click the button to add a class to me. Add a class name to the div element with idmyDIV in this example we use a button to add the class.
Set the class attribute for an element. For replacing all the existing classes with a single or more classes you should set the className attribute as follows. The operator adds the newClassName to the existing class list of the element.
It is used to set the className property. To set a class to an element you use the following code. This property is used to add a class name to the selected element.
The getElementsByClassName method returns a collection of an elements child elements with the specified class name as a NodeList object. If you use jquery you can set the class by using attr. Let menu document querySelector menu.
Toggle between two class names. Try it Yourself. Get the class attribute of myDIV.
Loop over the array and set each elements value. Try it Yourself. Documentreadyfunction function fSetClassvName element_idattrclass vName.
Adding the class name by using JavaScript can be done in many ways. The class name attribute can be used by CSS and JavaScript to perform certain tasks for elements with the specified class name. Learn how to add a class name to an element with JavaScript.
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