What is the hasClass function with plain JavaScript

0 votes

How do you do jQuery’s hasClass with plain ol’ JavaScript? For example,

<body class="foo thatClass bar">

What’s the JavaScript way to ask if <body> has thatClass?

Sep 2, 2020 in Java-Script by kartik
 • 37,510 points • 835 views

1 answer to this question.

0 votes

Hello @Kartik,

Simply use classList.contains():

if (document.body.classList.contains('thatClass')) {
    // do some stuff
}

Other uses of classList:

document.body.classList.add('thisClass');
// $('body').addClass('thisClass');

document.body.classList.remove('thatClass');
// $('body').removeClass('thatClass');

document.body.classList.toggle('anotherClass');

Hope it helps!!

Thank You!!

answered Sep 2, 2020 by Niroj
 • 82,880 points

Related Questions In Java-Script

0 votes
0 answers

What is the difference between ' and " in JavaScript?

I came across this query and am ...READ MORE

Sep 23, 2022 in Java-Script by Abhinaya
 • 1,160 points • 394 views
0 votes
1 answer

What is the difference between node.js and io.js?

Hello, io.js: Node-forward is basically being merged into io.js forked on ...READ MORE

answered Apr 24, 2020 in Java-Script by Niroj
 • 82,880 points • 632 views
0 votes
2 answers

Why doesn’t Postman get a “No 'Access-Control-Allow-Origin' header is present on the requested resource” error when my JavaScript code does?

My understanding is that you are using ...READ MORE

answered Feb 9, 2022 in Java-Script by Soham
 • 9,700 points • 23,478 views
0 votes
1 answer

What is an appropriate content-type header for JavaScript files?

Hello @kartik, JS has two registered MIME types:  The ...READ MORE

answered Jul 7, 2020 in Java-Script by Niroj
 • 82,880 points • 2,333 views
0 votes
1 answer

How to access PHP var from external javascript file?

Hello @kartik, You don't really access it, you ...READ MORE

answered Jul 6, 2020 in Java-Script by Niroj
 • 82,880 points • 7,176 views
0 votes
1 answer

How do I escape a single quote in SQL Server?

Hello @kartik, Single quotes are escaped by doubling ...READ MORE

answered Jul 21, 2020 in PHP by Niroj
 • 82,880 points • 5,886 views
0 votes
1 answer

How to specify a port to run a create-react-app based project?

Hello @kartik, You could use cross-env to set the port, ...READ MORE

answered Jul 22, 2020 in Angular by Niroj
 • 82,880 points • 5,332 views
0 votes
1 answer

How do you set a default value for a MySQL Datetime column?

Hello @kartik, In version 5.6.5, it is possible ...READ MORE

answered Aug 18, 2020 in PHP by Niroj
 • 82,880 points • 7,404 views
0 votes
1 answer

What is callback function in JavaScript?

callback is not a keyword, its just ...READ MORE

answered Jan 30, 2020 in Java-Script by Niroj
 • 82,880 points • 17,718 views
0 votes
1 answer

what is the $(document).ready equivalent without jQuery?

Hello @kartik, There are three options: If script is the last ...READ MORE

answered Apr 2, 2020 in Java-Script by Niroj
 • 82,880 points • 20,699 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP
"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.