Create a custom callback in JavaScript

Question

All I need to do is to execute a callback function when my current function execution ends.

function LoadData() 
{
    alert(\'The data has been loaded\');
          


        

Answer 1

function loadData(callback) {

    //execute other requirement

    if(callback && typeof callback == "function"){
        callback();
   }
}

loadData(function(){

   //execute callback

});