CODEWITHSUNDEEP
javascriptjquerycheckbox
divHelper11
divHelper11

Reputation: 2208

Checkbox value true/false

I have a form with checkbox and I want to keep it checked after submitting the form when it goes back to the same view with an error. I heard that the value attribute can help me to make the checkbox be checked so im trying to set it to true/false. Anyway, the input value stays "false" even if I click it. What happens exactly? I thought the value goes true/false after clicking the checkbox

<input type="checkbox" name="acceptRules" class="inline checkbox" id="checkbox1" value="false">

      <script>
          $("#checkbox1").is(':checked', function(){
              $("#checkbox1").attr('value', 'true');
          });
      </script>

Upvotes: 32

Views: 271696

Answers (10)

Nicolas PALLAS
Nicolas PALLAS

Reputation: 1

To avoid coding in JS, just use a hidden input before your checkbox:

<input type="hidden" name="acceptRules" value="false">
<input type="checkbox" name="acceptRules" value="true">

Upvotes: 0

Bohdan Misyurko
Bohdan Misyurko

Reputation: 31

Good practise to use this:

$('.name-checkbox:checked').length

Upvotes: 1

Muhammad Dwiky
Muhammad Dwiky

Reputation: 23

Or you can solve this with only JavaScript by using onClick:

<input type="checkbox" name="acceptRules" class="inline checkbox" id="checkbox1" value="false" onClick={e => console.log(e.target.checked)}>

Upvotes: 1

Oluebube Princess Egbuna
Oluebube Princess Egbuna

Reputation: 121

To return true or false depending on whether a checkbox is checked or not, I use this in JQuery

let checkState = $("#checkboxId").is(":checked") ? "true" : "false";

Upvotes: 12

Taplar
Taplar

Reputation: 24965

I'm going to post this answer under the following assumptions. 1) You (un)selected the checkbox on the first page and submitted the form. 2) Your building the second form and you setting the value="" true/false depending on if the previous one was checked. 3) You want the checkbox to reflect if it was checked or not before.

If this is the case then you can do something like:

var $checkbox1 = $('#checkbox1');
$checkbox1.prop('checked', $checkbox1.val() === 'true');

Upvotes: 1

Aju John
Aju John

Reputation: 2234

Use Checked = true

$("#checkbox1").prop('checked', true);

Note: I am not clear whether you want to onclick/onchange event on checkbox. is(":checked", function(){}) is a wrong in the question.

Upvotes: 11

Bojan Petkovski
Bojan Petkovski

Reputation: 6933

If I understand the question, you want to change the value of the checkbox depending if it is checked or not.

Here is one solution:

$('#checkbox-value').text($('#checkbox1').val());

$("#checkbox1").on('change', function() {
  if ($(this).is(':checked')) {
    $(this).attr('value', 'true');
  } else {
    $(this).attr('value', 'false');
  }
  
  $('#checkbox-value').text($('#checkbox1').val());
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>


<input type="checkbox" name="acceptRules" class="inline checkbox" id="checkbox1" value="false">

<div id="checkbox-value"></div>

Upvotes: 45

Jitendra Tiwari
Jitendra Tiwari

Reputation: 1691

Try this

$("#checkbox1").is(':checked', function(){
  $("#checkbox1").prop('checked', true);
});
      
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" name="acceptRules" class="inline checkbox" id="checkbox1" value="false">

Upvotes: 3

Uzbekjon
Uzbekjon

Reputation: 11813

jQuery.is() function does not have a signature for .is('selector', function).

I guess you want to do something like this:

      if($("#checkbox1").is(':checked')){
          $("#checkbox1").attr('value', 'true');
      }

Upvotes: 1

Michael Ambrose
Michael Ambrose

Reputation: 1060

Checkboxes can be really weird in JS. You're best off checking for the presence of the checked attribute. (I've had older jQuery versions return true even if checked is set to 'false'.) Once you've determined that something is checked then you can get the value from the value attribute.

Upvotes: 1

Related Questions