Group checkboxes in JSFiddle: Part2 [closed]

问题

Group checkboxes in JSFiddle : Part 1

After solving Part 1 for Global Checkbox for All Check/Uncheck. I have couple other issues to solve.

If I unchecked any of the items from list. Automatically Global (Check all) should be unchecked.

If I checked all of items individually. Automatically Global (Check all) should be checked. like this.

Code

 <fieldset>
    <!-- these will be affected by check all -->
    <div><input type="checkbox" ID="checkall1"> Check all</div>
    <div><input type="checkbox"> Checkbox</div>
    <div><input type="checkbox"> Checkbox</div>
    <div><input type="checkbox"> Checkbox</div>
</fieldset>
<fieldset>
    <!-- these won't be affected by check all; different field set -->
    <div><input type="checkbox" ID="checkall2"> Check all</div>
    <div><input type="checkbox"> Checkbox</div>
    <div><input type="checkbox"> Checkbox</div>
    <div><input type="checkbox"> Checkbox</div>
</fieldset>

   $('[id^=checkall]').click(function(){
    $(this).closest('fieldset').find('input').not(this).prop('checked',this.checked);
});

JSFiddle

回答1:

$('input[id^=checkall]').click(function(){
    $(this).closest('fieldset').find('input').not(this).prop('checked',this.checked);
});

$(':checkbox').not('[id^=checkall]').click(function(){
    var all = $(this).closest('fieldset').find('[id^=checkall]');
    var chks = $(this).closest('fieldset').find('input').not(all);

    all.prop('checked', chks.length == chks.filter(':checked').length);
})

Demo: Fiddle

来源：https://stackoverflow.com/questions/17548627/group-checkboxes-in-jsfiddle-part2

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jsfiddle