Created
May 22, 2012 02:18
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'group-required-by-name' to require at least one checkbox in a group to be checked
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//-------------------------------------------------------------------------------------------------- | |
// This is based on the 'group-required' rule from js-webshim/dev/extras/custom-validity.js but | |
// allows you to specify a group name, in case you need checkboxes with different names in the same | |
// group. | |
var groupTimer = {}; | |
$.webshims.addCustomValidityRule('group-required-by-name', function(elem, val){ | |
var $elem = $(elem); | |
var name = $elem.data('group-required'); | |
var filter = '[data-group-required="' + name + '"]' | |
if (!name || elem.type !== 'checkbox') { return; } | |
//console.log($elem, "name=", name); | |
var checkboxes = (elem.form && $(elem.form).find(':checkbox').filter(filter)) || $(filter); | |
var isValid = checkboxes.filter(':checked'); | |
if (groupTimer[name]){ | |
clearTimeout(groupTimer[name]); | |
} | |
groupTimer[name] = setTimeout(function(){ | |
checkboxes | |
.unbind('click.groupRequiredByName') | |
.bind('click.groupRequiredByName', function(){ | |
checkboxes.filter(filter).each(function(){ | |
$.webshims.refreshCustomValidityRules(this); | |
}); | |
}) | |
; | |
}, 9); | |
if (isValid[0]) { | |
return false; | |
} else { | |
return $(elem).data('errormessage') ? $(elem).data('errormessage') : true; | |
} | |
}, 'Please check one of these checkboxes.'); |
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