Answers for "jquery detect when a checkbox is checked"

How to check whether a checkbox is checked in 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 detect when a checkbox is checked

$(".checkbox").change(function() {
    if(this.checked) {
        //Do stuff
    }
});

checkbox is checked jquery

$("#out_of_stock_toggle").click(function(){
      if($(this).is(':checked')){
        //show oos
        $(".oos").fadeIn();
      }else{
        //hide oos
        $(".oos").fadeOut();
      }
    });