What does classname mean in js

ClassName is an attribute of the HTML element class name in JavaScript and is used to dynamically manipulate styles. Uses include: Access ClassName Add ClassName Remove ClassName Toggle ClassName Check if ClassName is included

What does ClassName mean in JavaScript?

ClassName is an attribute in JavaScript that represents the class name of an HTML element. It allows developers to dynamically manipulate and access styles of HTML elements through JavaScript scripts.

Method to use ClassName:

1. Access ClassName: You can use element.className to access the specified element ClassName.

const div = document.getElementById("myDiv");
console.log(div.className); // 输出：my-class

2. Add ClassName: You can use element.classList.add("newClass") to add a new ClassName to an element.

div.classList.add("new-class");
console.log(div.className); // 输出：my-class new-class

3. Remove ClassName: You can use element.classList.remove("removedClass") to remove a ClassName from an element.

div.classList.remove("my-class");
console.log(div.className); // 输出：new-class

4. Toggle ClassName: You can use element.classList.toggle("toggledClass") to switch the ClassName of the element, and move it if it exists Remove or add if not present.
5. Contains ClassName: You can use element.classList.contains("className") to check whether the element contains the specified ClassName.

Uses:

ClassName is useful in the following scenarios:

• Applying and removing styles dynamically
• Show or hide elements based on conditions
• Manipulate CSS animations and transitions
• Enhance user interaction

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