My problem is that when the checkbox below is clicked - the check function is called to check/uncheck all the checkboxes. But they have to change relatively to the invoking checkbox (the one with the "onchange" event).
The checkbox HTML declaration:
<input type="checkbox" onchange="$('input[type=checkbox][rel=users]').check();">
Sample JavaScript Code:
$.fn.check = function() {
$(this).each(function(){
$(this).attr('checked', checked);
});
}
And my question is: How can I get the DOM object corresponding to the "check all" checkbox?
Edit: Pass the this object of the checkAll to the function.
DEMO
<input type="checkbox"
onchange="$('input[type=checkbox][rel=users]').check(this);" />
Note the this is passed as .check(this)
And in the JS:
$(document).ready(function() {
$.fn.check = function(orgEl) {
$(this).each(function() {
$(this).attr('checked', orgEl.checked);
});
}
});
Old Post -
Bind the checkAll checkbox to an handler and call the fxn from inside.. See below,
HTML
<input type="checkbox" id="checkAll" >
JS
$(document).ready (function () {
$('#checkAll').click (function () {
//this inside is checkAll checkbox object.
$('input[type=checkbox][rel=users]').check();
});
});
Since you're binding this to the "checkall" checkbox, you have access to itself inline. So you can pass it to the jQuery .check() function you made and use it there. Look at this:
(please excuse my changes to your selecting, you can obviously use what you had before...but I would suggest using :checkbox instead of input[type=checkbox])
<html>
<head>
<script type="text/javascript" src="jquery-min.js"></script>
<script type="text/javascript">
$.fn.check = function (obj) {
$(this).each(function (){
this.checked = obj.checked;
});
}
</script>
</head>
<body>
<input type="checkbox" id="checkall" onclick="$('.check-item').check(this);" /><br />
<input type="checkbox" class="check-item" /><br />
<input type="checkbox" class="check-item" /><br />
<input type="checkbox" class="check-item" /><br />
<input type="checkbox" class="check-item" /><br />
<input type="checkbox" class="check-item" /><br />
<body>
View on JSFIDDLE.
I'm a fan of using HTML5 data attributes for stuff like this. With the following DOM structure, you can define your target checkboxes with a data-target attribute on the triggering checkbox. The target should be a valid jQuery selector string.
HTML:
<input type="checkbox" id="checkUsers" class="checkAll" data-target="input[type=checkbox][rel=users]">
<label for="checkUsers">Users:</label>
<input type="checkbox" rel="users">
<input type="checkbox" rel="users">
<input type="checkbox" rel="users">
<input type="checkbox" rel="users">
<input type="checkbox" rel="users">
<br><br>
<input type="checkbox" id="checkPlaces" class="checkAll" data-target="input[type=checkbox][rel=places]">
<label for="checkPlaces">Places:</label>
<input type="checkbox" rel="places">
<input type="checkbox" rel="places">
<input type="checkbox" rel="places">
<input type="checkbox" rel="places">
<input type="checkbox" rel="places">
Then you setup the plugin to use the target you defined to trigger the checks/unchecks based on the triggering checkbox's checked attribute.
Plugin:
(function( $ ){
$.fn.check = function() {
// "this" is a jQuery object of the checkbox that was clicked.
var target = this.data("target");
$(target).attr("checked", this[0].checked);
return this; //maintain chainability
};
})( jQuery );
The real benefit of this method is that it allows you to only have to manage one event handler declaration by attaching the event to a class instead of an id.
Event Handler Declaration:
$(function(){
$(".checkAll").click(function(){
$(this).check();
});
});
Related
I want to set checkbox checked on document load, if check box value="1", and unchecked if value="0".
<input type="checkbox" value="1">
<input type="checkbox" value="0">
<input type="checkbox" value="1">
Jquery: which is wrong, tried many things
$(document).ready ('input[type="checkbox"]', function(event) {
if ($(this).val==1) {
$(this).is(":checked")
}
});
JSFiddle
.ready() accepts a function as the single parameter which is executed after the DOM is ready.
You do not need any condition to check the value manually. You can simply use attribute selector:
$('input[type=checkbox][value=1]').attr('checked', true);
$(document).ready(function() {
$('input[type=checkbox][value=1]').attr('checked', true);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="checkbox" value="1">
<input type="checkbox" value="0">
<input type="checkbox" value="1">
There are two errors. First this line ready ('input[type="checkbox"]', function(event) { .ready receives a callback function and your code is wrong there. Secondly in if ($(this).val==1) { val is a method. So that will require braces. You can nly use attribute selector and marked it as checked.Also $(this).is(":checked") return a boolean value but it never checks a checkbox
$(document).ready(function() {
$('input[type="checkbox"][value="1"]').prop('checked', true)
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="checkbox" value="1">
<input type="checkbox" value="0">
<input type="checkbox" value="1">
EDIT:
Please read the end part of the post, I know the part that tells which are unchecked needs to be inside the block of code, the issue here is that the first part of the code is not registering the "click". So can't do anything without that.
E2: May take the suggestion of adding a onclick to the boxes, since the code for boxes is generated with JS, I would add it once and all of them will get the function call, but that feels kinda ugly
I have a set of check boxes, and when one is clicked I need to return the values of the unchecked ones.
HTML:
<div id="myCheckboxList">
<input type="checkbox" name="myList" value="1" checked>1
<input type="checkbox" name="myList" value="2" checked>2
<input type="checkbox" name="myList" value="3" checked>3
</div>
JavaScript:
$(function(){
$("input[name=myList]").on("click",function(){
console.log("triggered");
//code here to find which ones are unchecked
});
});
I have tried to also add this in the code
$boxes = $('input[name=myList]:not(:checked)');
$boxes.each(function(){
// Do stuff with for each unchecked box
});
Unfortunatly the "triggered" in not getting output to console, so unsure why it is so, and how would i get an event to happen when the checkboxes are hit
I copied your code directly to a fiddle, and it works fine. You could be missing the jquery library?
EDIT:
Just to be sure, I updated the snippet to generate the inputs, and it still works fine.
$(function() {
var html = '<input type="checkbox" name="myList" value="1" checked>1'
+'<input type="checkbox" name="myList" value="2" checked>2'
+'<input type="checkbox" name="myList" value="3" checked>3';
$("#myCheckboxList").html(html);
$("input[name=myList]").on("click", function() {
console.log("triggered");
//code here to find which ones are unchecked
$boxes = $('input[name=myList]:not(:checked)');
$boxes.each(function() {
console.log($(this).val());
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="myCheckboxList">
</div>
Easiest way would be to:
let v = $(this).attr('value');
if(v === 1){ // box 1 selected
Adding this inside your 'click' handler should work.
You need to add your each script inside your click event.
$(function(){
$("input[name=myList]").on("click",function(){
$("input[name=myList]:not(:checked)").each(function() {
console.log($(this).val());
});
});
});
<div id="myCheckboxList">
<input type="checkbox" name="myList" value="1" checked>1
<input type="checkbox" name="myList" value="2" checked>2
<input type="checkbox" name="myList" value="3" checked>3
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Another solution is to add an "onclick" method in your html. This will call a javascript function whenever the checkbox is clicked. That function can contain any logic for your checkboxes.
<input type="checkbox" name="myList" value="1" checked onclick="checkboxChangeEvent();">1
Then you can implement your javascript function to return a list of unchecked boxes or find the input boxes by name and return the alert as in previous answers.
function checkboxChangeEvent(){
$boxes = $('input[name=myList]:not(:checked)');
$boxes.each(function() {
alert($(this).val());
});
}
Try like this:
$(function(){
$("input[name=myList]").on("click",function(){
var uncheck=[];
//console.log("triggered");
//code here to find which ones are unchecked
$boxes = $("input[name=myList]:not(:checked)");
$boxes.each(function(){
// Do stuff with for each unchecked box
uncheck.push($(this).attr('value'))
console.log(uncheck);
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="myCheckboxList">
<input type="checkbox" name="myList" value="1" checked>1
<input type="checkbox" name="myList" value="2" checked>2
<input type="checkbox" name="myList" value="3" checked>3
</div>
I need a jQuery function that does the following thing: for example, when checkbox1 is checked, when I click on some other elements (with an id starting with element-) I could print the id of these elements in the console as follows:
$('#checkbox1').click(function() {
if ($(this).is(':checked')) {
$(document).on('click','[id^=element-]', function(e) {
console.log(this.id);
});
} else {}
});
I tested this example and it's not working. I have not idea when I'm wrong.
The simplest way to do this would be to invert your logic. That is to say, place the click handler on the required elements and within that check the state of the checkbox. Try this:
$(document).on('click', '[id^="element-"]', function(e) {
if ($('#checkbox1').is(':checked'))
console.log(this.id);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>
<input type="checkbox" id="checkbox1" />
Check me!
</label>
<div>
<button id="element-foo">Foo</button>
<button id="element-bar">Bar</button>
</div>
I tested it out, and this will work for you
$("input[id^=d]").on("click", function() {
var id = $(this).prop("id");
if ($("#c1").is(":checked")) {
console.log(id);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Dogs <input id="c1" type="checkbox" />
Cats <input id="d1" type="checkbox" />
Zebras <input id="d2" type="checkbox" />
Rhinos <input id="e1" type="checkbox" />
I have 2 checkboxes that one selects the other.
Checkbox1 has a change event. However, when I check checkbox1 via checkbox2, the event on checkbox1 is not being triggered.
See jsfiddle.
$(document).ready(function() {
$("#check1").change(arrangeWindow);
$("#check2").click(function(){
$("#check1").prop("checked", this.checked);
});
});
function arrangeWindow() {
console.log("Missing my baby");
}
<input type="checkbox" id="check1" value="value" />
<label for="chk">Checkbox 1</label>
<input type="checkbox" id="check2" value="value" />
<label for="chk">Checkbox 2 </label>
I can call arrangeWindow from check2 click function, but that's not smart.
How can I trigger the change event upon changing it via jquery?
Programmatically changing the checked property does not raise an event on the element. If you need that behaviour you can use trigger('change') manually:
$(document).ready(function() {
$("#check1").change(arrangeWindow);
$("#check2").change(function(){
$("#check1").prop("checked", this.checked).trigger('change');
});
});
function arrangeWindow() {
console.log("Missing my baby");
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="checkbox" id="check1" value="value" />
<label for="chk">Checkbox 1</label>
<input type="checkbox" id="check2" value="value" />
<label for="chk">Checkbox 2 </label>
Also note that you should always use the change event when dealing with checkboxes and radios for accessibility reasons, as that event can be fired on the element using the keyboard.
I have this javascript code
// Listen for click on toggle checkbox
$('#select-all').click(function(event) {
if(this.checked) {
// Iterate each checkbox
$(':checkbox').each(function() {
this.checked = true;
});
}
});
And I have this
<form action="" method="POST">
Toggle All :
<input type="checkbox" name="select-all" id="select-all" />
then at my table I have multiple checkbox
<input type="checkbox" name="checkbox-1" id="checkbox-1" value="1"> Select
<input type="checkbox" name="checkbox-2" id="checkbox-2" value="2"> Select
<input type="checkbox" name="checkbox-3" id="checkbox-3" value="3"> Select
<input type="checkbox" name="checkbox-4" id="checkbox-4" value="4"> Select
When I click on toggle all, it does not check checkbox-1 to checkbox-4
What went wrong in my javascript code.
Thanks!! I want to actually do a function that will send all the value of checkbox1-4 by post when they are checked on form submit.
Simply do like this.
$('#select-all').click(function(event) {
$(':checkbox').prop("checked", this.checked);
});
You do not need to loop through each checkbox to check all.
Demo
Wrap the code in dom ready if your script is in head tag
$(document).ready(function() {
$('#select-all').click(function(event) {
$(':checkbox').prop("checked", this.checked);
});
});