JAVASCRIPT

check if checkbox is checked jquery

//using plane javascript 
if(document.getElementById('on_or_off_checkbox').checked) {
    //I am checked
} 

//using jQuery
if($('#on_or_off_checkbox').is(':checked')){
    //I am checked
}

jquery check if checkbox is not checked

if (!$("#checkboxID").is(":checked")) {
    // do something if the checkbox is NOT checked
}

check whether a checkbox is checked in jQuery

if ($('#grepperRocks').is(':checked')) {
	// this checkbox is checked
}

jquery checkbox checked or not

$('input[type="checkbox"]').click(function(){
            if($(this).is(":checked")){
                console.log("Checkbox is checked.");
            }
            else if($(this).is(":not(:checked)")){
                console.log("Checkbox is unchecked.");
            }
        });

jquery check if checkbox is checked

if($('#on_or_off_checkbox').is(':checked')){
    //I am checked
}

jquery checkbox checked or not

<script>
    $(document).ready(function(){
        $('input[type="checkbox"]').click(function(){
            if($(this).prop("checked") == true){
                console.log("Checkbox is checked.");
            }
            else if($(this).prop("checked") == false){
                console.log("Checkbox is unchecked.");
            }
        });
    });

check if a checkbox is checked jquery

if($('#checkboxID').is(':checked')){ return true; }

jquery see if checkbox is checked

$('input.checkbox').is(':checked')

how do i check if JQuery checkbox is checked

$('#isAgeSelected').click(function() {
    $("#txtAge").toggle(this.checked);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js">
  </script>
<input type="checkbox" id="isAgeSelected"/>
<div id="txtAge" style="display:none">Age is something</div>

How to Check if Checkbox is Checked in jQuery

var isChecked = $('#checkboxId').prop('checked');
if(isChecked == true){
	//code
}

jquery check if all checkbox is not checked

 $('#checkAll').click(function () {    
     $('input:checkbox').prop('checked', this.checked);    
 });

check if checkbox is checked jquery

var $boxes = $('input[name=thename]:checked');