jQuery if checkbox is checked
JqueryCheckboxIf StatementJquery Problem Overview
I have a function below that I want to only trigger when a checkbox in the same tr is checked. Please tell me what I am doing wrong, the usual methods are not working. Thanks
JS
$(".add_menu_item_table").live('click', function() {
var value_td = $(this).parents('tr').find('td.td_name').text();
if ($('input.checkbox_check').attr(':checked')); {
var newDiv = $('<div class="div_menu_button"></div>');
var showDiv = $('<div id="show' + "0" + numShow++ + '" class="menu_button_info hidden"></div>');
var toggleTrigger = $('<a id="toggleshow' + "0" + numToggle++ + '" data-target="#show' + "0" + numTarget++ + '" class="toggle_trigger actions"> </a><div style="padding:5px"></div>');
var menuForm = $('<form id="menu_edit_form' + "0" + numForm++ + '" class="menu_creation_form"></form>');
$('#created_buttons_list').append(
newDiv.text(value_td)
);
newDiv.wrap("<li></li>");
newDiv.append(toggleTrigger);
newDiv.append(showDiv);
showDiv.append(menuForm);
menuForm.html('<label for="navigation_label">Navigation Label</label><input id="navigation_label' + "0" + numLabelone++ + '" type="text" placeholder="Navigation Label" name="navigation_label"><label for="attribute">Attribute</label><input id="attribute' + "0" + numLabeltwo++ + '" type="text" type="text" placeholder="Attribute" name="attribute"><label for="url">URL</label><input id="url' + "0" + numLabelthree++ + '" type="text" type="text" placeholder="URL" name="url"><input type="button" value="Remove" class="button_link remove_button"> <input type="reset" value="Cancel" class="button_link">');
}
});
var numToggle = 0;
var numShow = 0;
var numTarget = 0;
var numForm = 0;
var numLabelone = 0;
var numLabeltwo = 0;
var numLabelthree = 0;
<table width="316px" border="0" cellspacing="0" cellpadding="0" id="table-data">
<tbody>
<tr>
<td width="20px"><input type="checkbox" style="width:20px;" value="1" name="checkbox"></td>
<td width="200px"><a href="/admin/feedbackmanager/sortby/2/sortdesc/0">Page Name</a></td>
<td width="20px"><a href="/admin/feedbackmanager/sortby/3/sortdesc/0">Add</a></td>
</tr>
<tr>
<td><input type="checkbox" style="width:20px;" value="1" name="checkbox" class="checkbox_check"></td>
<td class="td_name">Timeplot</td>
<td><input class="add_menu_item_table" name="add_menu_item" value="Add" type="button"></td>
</tr>
<tr>
<td><input type="checkbox" style="width:20px;" value="1" name="checkbox" class="checkbox_check"></td>
<td class="td_name">Operations Manuals</td>
<td><input class="add_menu_item_table" name="add_menu_item" value="Add" type="button"></td>
</tr>
</tbody>
</table>
Jquery Solutions
Solution 1 - Jquery
if ($('input.checkbox_check').is(':checked')) {
Solution 2 - Jquery
for jQuery 1.6 or higher:
if ($('input.checkbox_check').prop('checked')) {
//blah blah
}
> the cross-browser-compatible way to determine if a checkbox is checked > is to use the property https://api.jquery.com/prop/
Solution 3 - Jquery
this $('#checkboxId').is(':checked') for verify if is checked
& this $("#checkboxId").prop('checked', true) to check
& this $("#checkboxId").prop('checked', false) to uncheck
Solution 4 - Jquery
If none of the above solutions work for any reason, like my case, try this:
<script type="text/javascript">
$(function()
{
$('[name="my_checkbox"]').change(function()
{
if ($(this).is(':checked')) {
// Do something...
alert('You can rock now...');
};
});
});
</script>
Solution 5 - Jquery
If checked:
$( "SELECTOR" ).attr( "checked" ) // Returns ‘true’ if present on the element, returns undefined if not present
$( "SELECTOR" ).prop( "checked" ) // Returns true if checked, false if unchecked.
$( "SELECTOR" ).is( ":checked" ) // Returns true if checked, false if unchecked.
Get the checked val:
$( "SELECTOR:checked" ).val()
Get the checked val numbers:
$( "SELECTOR:checked" ).length
Check or uncheck checkbox
$( "SELECTOR" ).prop( "disabled", false );
$( "SELECTOR" ).prop( "checked", true );
Solution 6 - Jquery
See main difference between ATTR | PROP | IS below:
Source: http://api.jquery.com/attr/
$( "input" )
.change(function() {
var $input = $( this );
$( "p" ).html( ".attr( 'checked' ): <b>" + $input.attr( "checked" ) + "</b><br>" +
".prop( 'checked' ): <b>" + $input.prop( "checked" ) + "</b><br>" +
".is( ':checked' ): <b>" + $input.is( ":checked" ) + "</b>" );
})
.change();
p {
margin: 20px 0 0;
}
b {
color: blue;
}
<meta charset="utf-8">
<title>attr demo</title>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
<input id="check1" type="checkbox" checked="checked">
<label for="check1">Check me</label>
<p></p>
</body>
</html>
Solution 7 - Jquery
You can use the .is(':checked') method which returns true if an element is checked, otherwise it returns false.
Working example
Using .is(':checked') method and a conditional statement to change the background-color
$('input').on('click', function(){
isChecked = $(this).is(':checked')
if(isChecked){
$('html').css('background-color','green')
}
else{
$('html').removeAttr('style')
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<label><input type="checkbox"> Try me </label>
Solution 8 - Jquery
to check input and get confirm by check box ,use this script...
$(document).on("change", ".inputClass", function () {
if($(this).is(':checked')){
confirm_message = $(this).data('confirm');
var confirm_status = confirm(confirm_message);
if (confirm_status == true) {
//doing somethings...
}
}});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<label> check action </lable>
<input class="inputClass" type="checkbox" data-confirm="are u sure to do ...?" >
Solution 9 - Jquery
New to jQuery/Javascript and tried the above solutions. Eventually, this is what worked for me to:
- keep elements hidden upon loading page (because checkboxes = unchecked by default), and then
- have elements show/hide based on whether the checkbox is checked or not.
It's probably a little ugly/redundant/extraneous syntax-wise, but it works for now!
Note: this all goes in the following <script> tag, right before the </body> tag on your HTML page:
<script type="text/javascript">
// 'solution code' goes here...
</script>
'solution code':
$(document).ready(function(){
// HIDE ELEMENTS UPON PAGE LOAD (CHECKBOX = UNCHECKED)
if ($([id="show_box"]).is(':checked') == false)
$("#hiddenDiv").hide();
// SHOW/HIDE ELEMENTS VIA CHECKBOX STATUS
$('[id="show_box"]').change(function()
{
if ($(this).is(':checked'))
$("#hiddenDiv").fadeIn();
else
$("#hiddenDiv").fadeOut();
});
});
- [id="show_box"] (the checkbox, with id 'show_box')
- #hiddenDiv (the id of the element I want to hide/show)
- this (since it's nested, it ends up representing 'show_box')
And here is the HTML code on the page, which the 'solution code' is referring to:
<!-- CHECKBOX -->
<input type="checkbox" id="show_box" name="box" value="">
<!-- ELEMENT THAT SHOWS/HIDES -->
<div id="hiddenDiv"></div>
Solution 10 - Jquery
I needed to know this property to automatically check/uncheck "sub-checkboxes" and this is working :
jQuery('.checkbox-parent').click(function(){
jQuery('.checkbox-child').prop(
'checked',
jQuery('.checkbox-parent').prop('checked')
);
});