Issue with jQuery 1.6: Can't uncheck checkboxes

[Bertrand Marron <me@…>]

Removing the checked attribute, or setting it to false, used to uncheck checkboxes in previous versions of jQuery.

jQuery 1.6 doesn't let you.

See ​http://jsfiddle.net/XwmGD/.

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Bertrand Marron

[Timmy Willison]

jQuery 1.6 removes the ambiguity between attributes and properties. The checked attribute (by spec) only sets the default value. There is no checked attribute on that checkbox to remove. You need to set the checked property to false: .prop('checked', false) or .checked = false. We understand this will break some people's code so this will be changed to how it worked previously for 1.6.1.

[Timmy Willison]

Set corresponding property to false when removing boolean attributes. Fixes #9094

Changeset: 480b88ca37fb3aff4ba043298a8fb419905d3f21

[crescentfresh]

Although this bug report only addresses boolean false, it should be noted that .attr('foo', true) is also broken. See ​http://jsfiddle.net/YsvyP/

[crescentfresh]

Reported the boolean true case as a separate bug: #9103

[Timmy Willison]

#9127 is a duplicate of this ticket.

[mc]

1.6 version seems to have bug on uncheck checkboxes. The following code works in 1.4.3, but not 1.6. Any idea? $('input:checkbox').attr('checked', false);

[Timmy Willison]

@mc: You can use prop to set the property, which is what you are really after. $('input:checkbox').prop('checked',false);

[anonymous]

Thanks a lot. Timmywil. "prop" works fine with 1.6 version in IE8.