Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


Update AJAX get with checkbox values as they get checked/unchecked

Posted on 2013-12-03
Medium Priority
Last Modified: 2013-12-03
I am trying to update an interface by checking/unchecking checkboxes so as the user does this the ajax request gets updated to reflect what's only checked

I have working on it's own meaning, I get all the checkboxes with the right values and the AJAX part is working fine (as in manualy)

My first step is to console.log() what I'm checking/unchecking and Im' getting stuck cause I'm only recording the first checkbox checked.

this is my HTML code:
<input type="checkbox" class="spaceTerm" name="team" value="2011">
<input type="checkbox" class="spaceTerm" name="team" value="2012">
<input type="checkbox" class="spaceTerm" name="team" value="2013">
<input type="checkbox" class="spaceTerm" name="team" value="archive">

Open in new window

This is my js code:

var termString;
$('.spaceTerm').on("click", function(){
	termString += $(this + ':checked').val();
	console.log(termString + " is checked");

Open in new window

is not adding or removing values from the string... I guess I'm a little confused on how I should approach this
Question by:vthunder70
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
LVL 44

Accepted Solution

Chris Stanyon earned 2000 total points
ID: 39692911
Not entirely clear what you need. Are you wanting a single string containing all the values that are checked.

Have at look at this fiddle - I've used an array instead of a string as you'll have more flexibility:

If at some point you're going to submit the form, then you'll need to name your checkboxes as an array (with square brackets), otherwise you'll only ever get the last value:


Then you're receiving script will get an array called team that you can loop through to get the values of those boxes that are ticked

Author Comment

ID: 39692947
The array part makes total sense. The only thing I'm concerned about is that it loops through the whole list every time a box gets clicked.

Wouldn't be better to just push only when one gets checked and search through the array for the one that gets unchecked?

Is this possible?
LVL 44

Expert Comment

by:Chris Stanyon
ID: 39692984
It is possible, but the fastest way to do it is to loop through as I've done. Other wise you would need to run an if/else statement to decide whether to add/remove the value.

Performance really won't be an issue here.

Author Comment

ID: 39693015
I guess I'm splitting hairs... so you are right I don't think performance will be improved by adding/removing values to the array instead of looping through it.

Thank you!
LVL 44

Expert Comment

by:Chris Stanyon
ID: 39693043
No worries. I've been there. Trying to optimize code to such a point that you spend hours writing code only to find out that most humans can't detect a couple of milliseconds difference :)

The each() function in jQuery is already optimized to quickly loop through arrays of elements.

Beside - have you looked into trying to remove an array element by value - not easy!!

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Knockoutjs (Knockout) is a JavaScript framework (Model View ViewModel or MVVM framework).   The main ideology behind Knockout is to control from JavaScript how a page looks whilst creating an engaging user experience in the least …
Introduction JSON is an acronym for JavaScript Object Notation.  It is a text-string data transport mechanism, capable of representing simple or complex data structures in a consistent and easy-to-read manner.  Similar in concept to XML, but more e…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
Suggested Courses

715 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question