remove value from the list
I have a list of checkboxes. Upon clicking on each of the checkboxes i am adding the value to the hidden variable. But the question is if I want to remove the value from the list upon unchecking the checkbox .开发者_JAVA百科 How this piece cab be done
here is the hidden form variable
<input name="IDList[]" type="hidden" id="IDList" value="" />
and the jquery
$(".myCheckboxClass").change(function() {
var output = 0;
$(".myCheckboxClass").change(function() {
if ($(this).is(":checked")) {
output += ", " + $(this).val();
} else {
output = $.grep(output, function(value) {
return value != $(this).val();
});
}
$("#IDList").val(output);
});
});
Something like this: (demo) http://jsfiddle.net/wesbos/5N2kb/1/
we use an object called vals
to store the info. ADding and removing as we check/uncheck.
var vals = {};
$('input[type=checkbox]').click(function() {
var that = $(this);
if (that.is(':checked')) {
console.log(this.name);
vals[this.name] = "In your Object";
}
else {
delete vals[this.name];
}
console.log(vals);
});
Following your logic, you could do this:
$('#IDList').data('value', []);
$(".myCheckboxClass").change(function() {
var list = $('#IDList').data('value');
if ($(this).is(":checked")) {
list.push($(this).val());
} else {
var indexToRemove = list.indexOf($(this).val());
list.splice(indexToRemove, 1);
}
$('#IDList').val(list);
});
But if you only care about the value of #IDList
upon data submission or other actions, you probably want to consider an alternative approach: collating the checked values when you need them.
$('#form').submit(function() {
var list = $('input.myCheckboxClass:checked', this).map(function() {
return $(this).val();
}).get();
$('#IDList').val(list);
});
See both of the above in action: http://jsfiddle.net/william/F6gVg/1/.
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