How to check undefined value in jQuery

0 votes

How we can add a check for an undefined variable, like:

function A(val) {
  if (val == undefined) 
    // do this
  else
    // do this
}

Jul 28, 2022 in Web Development by gaurav
• 23,260 points
1,432 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In Web Development

0 votes
0 answers

How to get the value of a checkbox flipswitch in JQuery Mobile 1.4.5?

I'm using following markup to create a ...READ MORE

Aug 22, 2022 in Web Development by gaurav
• 23,260 points
324 views
0 votes
1 answer

how to use substr() function in jquery?

To get substring of a string in ...READ MORE

answered Jun 27, 2022 in Web Development by rajatha
• 7,680 points
1,023 views
0 votes
1 answer

How to loop through array in jQuery?

Generic loop: var i; for (i = 0; i ...READ MORE

answered Jun 28, 2022 in Web Development by rajatha
• 7,680 points
1,930 views
0 votes
1 answer

How to display current element in jQuery?

<! DOCTYPE html> <html> <head> <script> $(document). ready(function(){ $("button"). click(function(){ $("p"). text("Welcome to ...READ MORE

answered Jun 27, 2022 in Web Development by rajatha
• 7,680 points
1,113 views
0 votes
0 answers

How to add a link in Jquery PrettyPhoto to download the image

I am using Jquery PrettyPhoto to have ...READ MORE

Jun 29, 2022 in Web Development by gaurav
• 23,260 points
682 views
0 votes
1 answer

How to Fade In/Out multiple texts using CSS/jQuery like on Droplr?

The jQuery fadeIn() method is used to ...READ MORE

answered Jun 29, 2022 in Web Development by rajatha
• 7,680 points
1,085 views
0 votes
1 answer

What is jQuery?

Hey, jQuery is a fast and concise JavaScript ...READ MORE

answered Feb 14, 2020 in JQuery by kartik
• 37,510 points
1,037 views
0 votes
1 answer

Uncaught TypeError: Cannot read property 'msie' of undefined - jQuery tools

Hello, Use the following script tag in your ...READ MORE

answered Apr 28, 2020 in JQuery by Niroj
• 82,880 points
14,472 views
0 votes
1 answer

Uncaught Error: Bootstrap's JavaScript requires jQuery

Hello @kartik, You have provided wrong order for ...READ MORE

answered Apr 28, 2020 in JQuery by Niroj
• 82,880 points
22,569 views
0 votes
1 answer

How to make Bootstrap popover Appear/Disappear on hover instead of click?

Hello @kartik, Set the trigger option of the popover to hover instead ...READ MORE

answered May 12, 2020 in JQuery by Niroj
• 82,880 points
3,016 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