Develop Reference

Setting checkboxes using Jquery

I have a dynamic form that has a number of checkboxes in it. I want to create a "select all" method that when clicked automatically checks all the boxes in the form.
[x] select all //<input type="checkbox" id="select-all"> Select all
[] item 1 //<input type="checkbox" id="1" class="checkbox1" value="1">
[] item 2 //<input type="checkbox" id="2" class="checkbox1" value="2">
[submit]
My jQuery is as follows:
$(document).ready(function(){
$('#select-all').click(function() {
if (this.checked)
{
console.log("Check detected");
$('.checkbox1').each(function() {
console.log('Checking the item with value:' + this.value );
$(this).prop('checked', true);
console.log(this);
});
} else {
console.log("not checked");
}
});
});
My console output:
> Check detected
> Checking the item with value:1
> <input type=​"checkbox" id=​"1" class=​"checkbox1" value=​"1">​
> Checking the item with value:2
> <input type=​"checkbox" id=​"2" class=​"checkbox1" value=​"2">​
I am able to loop through each item however, I am not sure how to actually set the checkbox to checked.
The part I am struggling with is the actual setting of the checked state, I know I need to use: .prop('checked',true) however, what do I use for the actual element? $(this) obviously does not work...
$(this).prop('checked', true);

Use this simple code
$(".checkAll").change(function(){
$('.checkbox1').prop('checked', this.checked);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>Check all</label>
<input type="checkbox" class="checkAll" />
<br/><br/>
<input type="checkbox" class="checkbox1" />
<input type="checkbox" class="checkbox1" />
<input type="checkbox" class="checkbox1" />
<input type="checkbox" class="checkbox1" />

You are referring #select-all as (this.checked) ,You need to refer as $(this).
Secondly you can use :checked to find out if it is checked or not.
Thirdly you dont need to loop over $('.checkbox1'). jquery will match all elements and will update the attribute.
Below is the snippet which may be helpful
$(document).ready(function() {
$('#select-all').click(function() {
if ($(this).is(":checked")) {
console.log("Check detected");
$('.checkbox1').prop('checked', true)
} else {
$('.checkbox1').prop('checked', false)
}
});
// If select-all is selected and if one check box is unchecked ,
//then select-all will be unchecked
$('.checkbox1').click(function(event) {
if ($(this).is(':checked')) {
// #select-all must be checked when all checkbox are checked
} else {
if ($('#select-all').is(':checked')) {
$('#select-all').prop('checked', false)
}
}
})
});
JSFIDDLE

demo link
js code
$('.checkbox1').click(function(event) {
var _this = $(this);
if (!_this.prop('checked')) {
$('#select-all').prop('checked', false)
}
})
$('#select-all').click(function() {
var _this = $(this);
var _value = _this.prop('checked');
console.log("Check detected");
$('.checkbox1').each(function() {
console.log('Checking the item with value:' + this.value);
$(this).prop('checked', _value);
console.log(this);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" id="select-all"> Select all
<input type="checkbox" id="1" class="checkbox1" value="1">
<input type="checkbox" id="2" class="checkbox1" value="2">

Just to answer this question. I tried the various solutions offered and they appeared not to work. However I then realised that due to using Jquery Uniform I needed to add an additional bit of code to get the display to work correctly:
This post was helpful.
Thank you to all who have taken the time to answer.
My final code:
$(document).ready(function(){
$('#select-all').click(function() {
if (this.checked)
{
$('.checkbox1').prop('checked', true);
} else {
$('.checkbox1').prop('checked', false);
}
$.uniform.update('.checkbox1');
});
});

How to use jQuery for listening if checkbox is changed not by clicking?

I have a number of checkboxes that change state(checked ,not checked) using another jQuery statement:
Elements:
<input type="checkbox" id="select_a">select group A</input>
<input type="checkbox" id="select_b">select group B</input>
<input type="checkbox" id="mix">select mix</input>
<div id="group_a">
<input type="checkbox" id="a_1">group A_1</input>
<input type="checkbox" id="a_2">group A_2</input>
</div>
<div id="group_b">
<input type="checkbox" id="b_1">group B_1</input>
<input type="checkbox" id="b_2">group B_2</input>
</div>
JQUERY
jQuery("#select_a").click(function () {
if (this.checked) jQuery("div#group_a input:checkbox").prop("checked", true);
else jQuery("div#group_a input:checkbox").prop("checked", false);
});
jQuery("#select_b").click(function () {
if (this.checked) jQuery("div#group_b input:checkbox").prop("checked", true);
else jQuery("div#group_b input:checkbox").prop("checked", false);
});
jQuery("#mix").click(function () {
if (this.checked) {
jQuery("#a_1").prop("checked", true);
jQuery("#b_1").prop("checked", true);
} else {
jQuery("#a_1").prop("checked", false);
jQuery("#b_1").prop("checked", false);
}
});
I need a way to set a listener to each checkbox in the groups, I used this way which works like this:
jQuery("div input:checkbox").click(function(e){
alert(e.target.id);
});
but this only works if the checkbox was clicked by the mouse, I would like a way to fire an event(set a listener) for each checkbox if it was checked by something other than the mouse.
Demo

You can use change() event handler
jQuery("div input:checkbox").change(function(){
alert(this.id);
});

Try change event, also for the top controls use radio instead of checkbox as any one would be checked:
$(function() {
var grp1 = $('#group_a').find('input[type=checkbox]');
var grp2 = $('#group_b').find('input[type=checkbox]');
$('input[name=grp]').on('change', function(e) {
var id = this.id;
grp1.prop('checked', 'select_a' === id);
grp2.prop('checked', 'select_b' === id);
if ('mix' === id) {
grp1.eq(0).prop('checked', true);
grp2.eq(0).prop('checked', true);
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<!-- use radio with name -->
<input type="radio" name="grp" id="select_a" />select group A
<input type="radio" name="grp" id="select_b" />select group B
<input type="radio" name="grp" id="mix" />select mix
<div id="group_a">
<input type="checkbox" id="a_1" />group A_1
<input type="checkbox" id="a_2" />group A_2
</div>
<div id="group_b">
<input type="checkbox" id="b_1" />group B_1
<input type="checkbox" id="b_2" />group B_2
</div>

How do I show an input field if a radio button is checked using jquery

I have a radio button called "other," and when checked, I want a input field called "other-text" to show up. It's fairly simple, but I've been failing all morning.
<input name="ocalls" type="radio" name="other" id="other-radio" value="Yes"><b>Other</b><br />
<input type="text" name="other-text" id="other-text" style="display:none" />
Here is my javascript:
jQuery(function(){
jQuery("input[name=other]").change(function(){
if ($(this).val() == "Yes") {
jQuery("#other-text").show()
}
else {
jQuery("#other-text").hide();
}
});
});
JSFiddle of the failure. http://jsfiddle.net/Wpt3Y/532/

This works
jQuery("#other-radio").change(function(){...

Just updated your jsfiddle: http://jsfiddle.net/Wpt3Y/539/
<pre><input type="radio" name="other" id="other-radio" value="Yes"><b>Other</b></pre>
Your code works, you simply mistyped your radio input, it had two name attributes.

I suggest to go this way. Tried to use prop() but realised you use old version of jquery
jQuery("input:radio[name='ocalls']").change(function(){
if ($(this).attr("checked") == true) {
jQuery("#other-text").show();
}
else {
jQuery("#other-text").hide();
}
});
example with radio
Instead you can use checkbox:
html
<input name="ocalls" type="checkbox" name="other" id="other-radio" value="Yes"><b>Other</b><br />
<input type="text" name="other-text" id="other-text" style="display:none" />
js
jQuery("input:checkbox[name='ocalls']").change(function(){
if ($(this).attr("checked") == true) {
jQuery("#other-text").show();
}
else {
jQuery("#other-text").hide();
}
});
example with checkbox

<form>
<input name="ocalls" type="radio" name="other" id="other-radio" value="Yes">
<b>Other</b><br />
</input>
<input type="text" name="other-text" id="other-text" style="display: none;" />
</form>
jQuery(function(){
jQuery("#other-radio").change(function(){
if ($(this).val() == "Yes") {
jQuery("#other-text").show()
}
else {
jQuery("#other-text").hide();
}
});
});
Try this.

If you want that toggle effect you can use this code with the checkbox.
jQuery(function(){
jQuery("input[name=ocalls]").change(function(){
if($(this).attr("checked"))
{
$("#other-text").show();
}
else
{
$("#other-text").hide();
}
});
});

Your code is not working because you have name attribute twice in radio button.
use this:
<input type="radio" name="other" id="other-radio" value="Yes">
remove name="ocalls" attribute.

disable checkbox if input value is zero

i have a list of check-boxes which is created dynamically and there is input field for each check box so i want to disable the check box if input field value is zero. below is my code
HTML code
<input class="check" id="check" name="check" type="checkbox"><label for="check">checkbox <input type="hidden" id="test" value="0" /></label>
<input class="check" id="check1" name="check1" type="checkbox"><label for="check1">checkbox1 <input type="hidden" id="test" value="6" /></label>
Jquery
if($("#test").val() == "0"){
$('.check').attr("disabled", "disabled");
}
jsfiddle

You used twice id=test and JavaScript works with only the first of them.
Change id=test to class=test, or works with two differents ids.
Working code:
$('.test').each(function() {
if ($(this).val() == '0') {
$(this).parent().prev().attr('disabled', 'disabled');
}
});
http://jsfiddle.net/cDD5L/

$("input[type=hidden]").each(function() {
if($(this).val()==0){
$(this).parent().prev().attr('disabled', 'disabled');
}
});
Demo:
http://jsfiddle.net/SxypS/

Please use
$(function() {
enable_cb();
$("#group1").click(enable_cb);
});
function enable_cb() {
if (this.checked) {
$("input.group1").removeAttr("disabled");
} else {
$("input.group1").attr("disabled", true);
}
}
It will work for you.
Let me know if still not work

checking all checkboxes jquery

Why in my js code can just with one click on name:check_all checking all checkboxes?
HTML:
<div id="ss">
<input type="checkbox" name="check_all">
</div>
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
<input type="checkbox" name="checked" class="idRow">
jQuery:
$(document).on('click change','input[name="check_all"]',function() {
var checkboxes = $('.idRow');
if($(this).is(':checked')) {
checkboxes.attr("checked" , true);
} else {
checkboxes.attr ( "checked" , false );
}
});
DEMO: http://jsfiddle.net/KdaZr/
My jQuery version is 1.9.
How can fix it?

Use prop method. When your markup is rendered attributes become properties of the elements, using JavaScript you should modify properties of the element.
$(document).on('change','input[name="check_all"]',function() {
$('.idRow').prop("checked" , this.checked);
});
http://jsfiddle.net/GW64e/
Note that if input[name="check_all"] is not generated dynamically there is no need to delegate the event.

Use .prop, not .attr, to change properties of elements. .attr is for HTML attributes.
http://jsfiddle.net/KdaZr/1/

fix is as follow:-
$(document).on('click change','input[name="check_all"]',function() {
var checkboxes = $('.idRow');
if($(this).is(':checked')) {
checkboxes.each(function(){
this.checked = true;
});
} else {
checkboxes.each(function(){
this.checked = false;
});
}
});

A complete solution select || deselect checkbox jQuery :
$(document).ready(function() {
$("#checkedAll").change(function(){
if(this.checked){
$(".checkSingle").each(function(){
this.checked=true;
})
}else{
$(".checkSingle").each(function(){
this.checked=false;
})
}
});
$(".checkSingle").click(function () {
if ($(this).is(":checked")){
var isAllChecked = 0;
$(".checkSingle").each(function(){
if(!this.checked)
isAllChecked = 1;
})
if(isAllChecked == 0){ $("#checkedAll").prop("checked", true); }
}
else {
$("#checkedAll").prop("checked", false);
}
});
});
Html should be :
Single check box on checked three checkbox will be select and deselect.
<input type="checkbox" name="checkedAll" id="checkedAll"></input>
<input type="checkbox" name="checkAll" class="checkSingle"></input>
<input type="checkbox" name="checkAll" class="checkSingle"></input>
<input type="checkbox" name="checkAll" class="checkSingle"></input>
Hope this helps to someone as it did for me.