选中一个复选框后，选中所有其他复选框

Question

I have a form and group of checkboxes in it. (These checkboxes are dynamically created but I dont think it is important for this question). The code that generates them looks like this (part of the form):

<div id="ScrollCB">
    <input type="checkbox" name="ALL" value="checked" checked="checked">
    All (if nothing selected, this is default) <br>
    <c:forEach items="${serviceList}" var="service">
       <input type="checkbox" name="${service}" value="checked"> ${service} <br>
    </c:forEach>
</div>

What I want to do is control, whether the checkbox labeled "ALL" is checked and if yes - check all other checkboxes (and when unchecked, uncheck them all).

I tried doing this with javascript like this (found some tutorial), but it doesnt work (and Im real newbie in javascript, no wonder):

<script type="text/javascript">
  $ui.find('#ScrollCB').find('label[for="ALL"]').prev().bind('click',function(){
  $(this).parent().siblings().find(':checkbox').attr('checked',this.checked).attr('disabled',this.checked);
}); });
</script>

Could you tell me some simple approach how to get it work? Thanks a lot!

Answer 1

demo

updated_demo

HTML:

<label><input type="checkbox" name="sample" class="selectall"/> Select all</label>

<div id="checkboxlist">

    <label><input type="checkbox" name="sample[]"/>checkbox1</label><br />
    <label><input type="checkbox" name="sample[]"/>checkbox2</label><br />
    <label><input type="checkbox" name="sample[]"/>checkbox3</label><br />
    <label><input type="checkbox" name="sample[]"/>checkbox4</label><br />

</div>

JS:

$('.selectall').click(function() {
    if ($(this).is(':checked')) {
        $('div input').attr('checked', true);
    } else {
        $('div input').attr('checked', false);
    }
});

Answer 2

HTML:

<form>
<label>
    <input type="checkbox" id="selectall"/> Select all
</label>
<div id="checkboxlist">
    <label><input type="checkbox" name="sample[]"/>checkbox1</label><br />
    <label><input type="checkbox" name="sample[]"/>checkbox2</label><br />
    <label><input type="checkbox" name="sample[]"/>checkbox3</label><br />
    <label><input type="checkbox" name="sample[]"/>checkbox4</label><br />
</div>
</form>

JS:

$('#selectall').click(function() {
    $(this.form.elements).filter(':checkbox').prop('checked', this.checked);
});

http://jsfiddle.net/wDnAd/1/

Answer 3

Thanks to @Ashish, I have expanded it slightly to allow the "master" checkbox to be automatically checked or unchecked, if you manually tick all the sub checkboxes.

FIDDLE

HTML

<label><input type="checkbox" name="sample" class="selectall"/>Select all</label>

<div id="checkboxlist">
    <label><input type="checkbox" class="justone" name="sample[]"/>checkbox1</label><br/>
    <label><input type="checkbox" class="justone" name="sample[]"/>checkbox2</label><br />
    <label><input type="checkbox" class="justone" name="sample[]"/>checkbox3</label><br />
    <label><input type="checkbox" class="justone" name="sample[]"/>checkbox4</label><br />
</div>

SCRIPT

$('.selectall').click(function() {
    if ($(this).is(':checked')) {
        $('input:checkbox').prop('checked', true);
    } else {
        $('input:checkbox').prop('checked', false);
    }
});

And now add this to manage the master checkbox as well...

$("input[type='checkbox'].justone").change(function(){
    var a = $("input[type='checkbox'].justone");
    if(a.length == a.filter(":checked").length){
        $('.selectall').prop('checked', true);
    }
    else {
        $('.selectall').prop('checked', false);
    }
});

Answer 4

Add extra script according to your checkbox group:

<script language="JavaScript">
function selectAll(source) {
    checkboxes = document.getElementsByName('colors[]');
    for(var i in checkboxes)
        checkboxes[i].checked = source.checked;
}
</script>

HTML Code:

<input type="checkbox" id="selectall" onClick="selectAll(this,'color')" />Select All
<ul>
<li><input type="checkbox" name="colors[]" value="red" />Red</li>
<li><input type="checkbox" name="colors[]" value="blue" />Blue</li>
<li><input type="checkbox" name="colors[]" value="green" />Green</li>
<li><input type="checkbox" name="colors[]" value="black" />Black</li>
</ul>

Answer 5

use this i hope to help you i know that this is a late answer but if any one come here again

$("#all").change(function () {
        $("input:checkbox").prop('checked', $(this).prop("checked"));
    });

Answer 6

You can use jQuery like so:

jQuery

$('[name="ALL"]:checkbox').change(function () {
   if($(this).attr("checked")) $('input:checkbox').attr('checked','checked');
   else $('input:checkbox').removeAttr('checked');
});

A fiddle .

Answer 7

I am not sure why you would use a label when you have a name on the checkbox. Use that as the selector. Plus your code has no labels in the HTML markup so it will not find anything.

Here is the basic idea

$(document).on("click",'[name="ALL"]',function() {
    $(this).siblings().prop("checked",this.checked);
});

if there are other elements that are siblings, than you would beed to filter the siblings

$(document).on("click",'[name="ALL"]',function() {
    $(this).siblings(":checkbox").prop("checked",this.checked);
});

jsFiddle

Answer 8

var selectedIds = [];
function toggle(source) {
    checkboxes = document.getElementsByName('ALL');
    for ( var i in checkboxes)
        checkboxes[i].checked = source.checked;
}
function addSelects() {

    var ids = document.getElementsByName('ALL');

    for ( var i = 0; i < ids.length; i++) {
        if (ids[i].checked == true) {
            selectedIds.push(ids[i].value);
        }
    }
}

In HTML:

Master Check box <input type="checkbox" onClick="toggle(this);">

Other Check boxes <input type="checkbox" name="ALL">

Answer 9

You can use the :first selector to find the first input and bind the change event to it. In my example below I use the :checked state of the first input to define the state of it's siblings. I would also suggest to put the code in the JQuery ready event.

    $('document').ready(function(){   
        $('#ScrollCB input:first').bind('change', function() {
            var first = $(this);
            first.siblings().attr('checked', first.is(':checked'));
        });
    });

Answer 10

Only in JavaScript with auto check/uncheck functionality of master when any child is checked/unchecked.

function FnCheckAll()
    {
        var ChildChkBoxes = document.getElementsByName("ChildCheckBox");
        for (i = 0; i < ChildChkBoxes.length; i++)
        {
            ChildChkBoxes[i].checked = document.forms[0].CheckAll.checked;
        }
    }
function FnCheckChild()
    {
        if (document.forms[0].ChildCheckBox.length > document.querySelectorAll('input[name="ChildCheckBox"]:checked').length)
            document.forms[0].CheckAll.checked = false;
        else
            document.forms[0].CheckAll.checked = true;
    }

Master CheckBox:

<input type="checkbox" name="CheckAll" id="CheckAll" onchange="FnCheckAll()" />

Child CheckBox:

<input type="checkbox" name="ChildCheckBox" id="ChildCheckBox" onchange="FnCheckChild()" value="@employee.Id" />```