check / uncheck checkbox using jquery?

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Setting “checked” for a checkbox with jQuery? 38 answers

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For jQuery 1.6+ :

.attr() is deprecated for properties; use the new .prop() function instead as:

$('#myCheckbox').prop('checked', true); // Checks it
$('#myCheckbox').prop('checked', false); // Unchecks it

For jQuery < 1.6:

To check/uncheck a checkbox, use the attribute checked and alter that. With jQuery you can do:

$('#myCheckbox').attr('checked', true); // Checks it
$('#myCheckbox').attr('checked', false); // Unchecks it

Cause you know, in HTML, it would look something like:

<input type="checkbox" id="myCheckbox" checked="checked" /> <!-- Checked -->
<input type="checkbox" id="myCheckbox" /> <!-- Unchecked -->

However, you cannot trust the .attr() method to get the value of the checkbox (if you need to). You will have to rely in the .prop() method.

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You can use prop() for this, as Before jQuery 1.6 , the .attr() method sometimes took property values into account when retrieving some attributes, which could cause inconsistent behavior. As of jQuery 1.6 , the .prop() method provides a way to explicitly retrieve property values, while .attr() retrieves attributes.

var prop=false;
if(value == 1) {
   prop=true; 
}
$('#checkbox').prop('checked',prop);

or simply,

$('#checkbox').prop('checked',(value == 1));

Snippet

$(document).ready(function() {
  var chkbox = $('.customcheckbox');
  $(".customvalue").keyup(function() {
    chkbox.prop('checked', this.value==1);
  });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<h4>This is a domo to show check box is checked
if you enter value 1 else check box will be unchecked </h4>
Enter a value:
<input type="text" value="" class="customvalue">
<br>checkbox output :
<input type="checkbox" class="customcheckbox">

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您可以根据以下值设置复选框的状态：

$('#your-checkbox').prop('checked', value == 1);

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