hilkbahar

// gecko and  webkit
// details here https://developer.mozilla.org/en-US/docs/DOM/event.initKeyEvent

var keyboardEvent = document.createEvent("KeyboardEvent");
var initMethod = typeof keyboardEvent.initKeyboardEvent !== 'undefined' ? "initKeyboardEvent" : "initKeyEvent";


keyboardEvent[initMethod](
                   "keydown", // event type : keydown, keyup, keypress
                    true,     // bubbles

hilkbahar

html {
  height: 100%;
  box-sizing: border-box;
}

body {
  position: relative;
  padding-bottom: 6rem;
  min-height: 100%;
}

hilkbahar

function nestedToFlatArray(arr, returnArr) {
    if(returnArr.length == 0)
        returnArr = [];
        
    for(var i=0; i<arr.length; i++) {
      if(Array.isArray(arr[i])) {
        nestedToFlatArray(arr[i], returnArr);
      }
      else {
        returnArr.push(arr[i]);