How To Modify CSS Classes in JavaScript?

The practice of making changes to DOM elements by directly manipulating JavaScript and CSS is frowned upon. It's usually a sign that something has been coded poorly and that the code can be streamlined using one of the many perfectly good JavaScript libraries out there. The chances are that a certain pattern or piece of code for what you need already exists, but in the rare instance when it doesn't, CSS is still a perfectly valid option just as long as you wrap your methods inside of a conditional check to make sure nothing has gone wrong.

Also Check these Questions:
How to Get Class List of an Element with jQuery?
Cannot read property 'classList' of undefined
javascript classlist add

classname toggle js

on Jan 01, 1970 
document.getElementById('myButton').onclick = function() {
    this.classList.toggle('active');
}

Add Comment

0

classList.toggle

on Jan 01, 1970 
classList.item(index); // Returns the item in the list by its index, or undefined if index is greater than or equal to the list's length
classList.contains(token); // Returns true if the list contains the given token, otherwise false.
classList.add(token1[, ...tokenN]); // Adds the specified token(s) to the list.
classList.remove(token1[, ...tokenN]); // Removes the specified token(s) from the list.
classList.replace(oldToken, newToken); // Replaces token with newToken.
classList.supports(token); // Returns true if a given token is in the associated attribute's supported tokens.
classList.toggle(token[, force]); // Removes token from the list if it exists, or adds token to the list if it doesn't. Returns a boolean indicating whether token is in the list after the operation.
classList.entries(); // Returns an iterator, allowing you to go through all key/value pairs contained in this object.
classList.forEach(callback[ ,thisArg]); // Executes a provided callback function once per DOMTokenList element.
classList.keys(); // Returns an iterator, allowing you to go through all keys of the key/value pairs contained in this object.
classList.values(); // Returns an iterator, allowing you to go through all values of the key/value pairs contained in this object.

Add Comment

0

css class list

on Jan 01, 1970 
var myElement = document.getElementById("myElementID");
myElement.classList.add("style1 style2");
myElement.classList.remove("style1 style2");

Add Comment

0

ClassList

on Jan 01, 1970 
const div = document.createElement('div');
div.className = 'foo';

// our starting state: <div class="foo"></div>
console.log(div.outerHTML);

// use the classList API to remove and add classes
div.classList.remove("foo");
div.classList.add("anotherclass");

// <div class="anotherclass"></div>
console.log(div.outerHTML);

// if visible is set remove it, otherwise add it
div.classList.toggle("visible");

// add/remove visible, depending on test conditional, i less than 10
div.classList.toggle("visible", i < 10 );

console.log(div.classList.contains("foo"));

// add or remove multiple classes
div.classList.add("foo", "bar", "baz");
div.classList.remove("foo", "bar", "baz");

// add or remove multiple classes using spread syntax
const cls = ["foo", "bar"];
div.classList.add(...cls);
div.classList.remove(...cls);

// replace class "foo" with class "bar"
div.classList.replace("foo", "bar");

Add Comment

0

JS classList

on Jan 01, 1970 
-- HTML --
<div class='container'></div>

-- JAVASCRIPT --
element.classList.contains('container'); // True or false
element.classList.add('my-class'); // Adds the class if it isn't present yet
element.classList.remove('my-class'); // Removes the class if it’s present
element.classList.toggle('my-class'); // Adds if not present, else removes

Add Comment

0

classlist

on Jan 01, 1970 
// use the classList API to remove and add classes
div.classList.remove("foo");
div.classList.add("anotherclass");

Add Comment

0

This means that any className added in JS leads to a new class being created, which is not what we want; this will actually cause classes to be removed.

Javascript answers related to "Classlist.toggle"

Classlist.toggle Classlist.toggle javascript classlist add Classlist contains Classlist.toggle Classlist contains Classlist contains Classlist contains Classlist.toggle javascript classlist add Classlist contains javascript classlist add Classlist contains Cannot read property 'classList' of undefined toggle class Classlist.toggle toggle class toggle class hide show toggle hide show toggle
View All Javascript queries

Javascript queries related to "Classlist.toggle"

Browse Other Code Languages

Abap ActionScript Assembly BASIC C C# C++ Clojure Cobol CSS Dart Delphi Elixir Erlang F# Fortran Go Groovy Haskell Html Java Javascript Julia Kotlin Lisp Lua Matlab Objective-C Pascal Perl PHP PostScript Prolog Python R Ruby Rust Scala Scheme Shell/Bash Smalltalk SQL Swift TypeScript VBA WebAssembly Whatever
CodeProZone