Answers for "function to click on a class"

class onclick jqery

$(document).on('click','.addproduct', function(){

    //your code here

 });

jquery is triggered on every element with class name

$(".yourButtonClass").on('click', function(event){
    event.stopPropagation();
    event.stopImmediatePropagation();
    //(... rest of your JS code)
});