shortcut keys for youtube comment reply template

fastReply.js

// ==UserScript==
// @name Youtube Comment Reply
// @namespace Violentmonkey Scripts
// @match https://www.youtube.com/comments
// @grant none
// ==/UserScript==
// 


(function () {
  
  var simulateClick = function (elem) {
	// Create our event (with options)
	var evt = new MouseEvent('click', {
		bubbles: true,
		cancelable: true,
		view: window
	});
	// If cancelled, don't dispatch our event
	var canceled = !elem.dispatchEvent(evt);
};
  
  

  replyFunc = function(e){
    
    switch (e.key){
      case "F1":
        cmtMessage = "Thanks bro"
        break;
      case "F2":
        cmtMessage = "Issarahata karannam bro"
        break;
      case "F3":
        cmtMessage = "Thanks, issarahata karannam bro"
        break;        
      case "F4":
        cmtMessage = "Price eka description eke dala thiyenawa bro"
        break;
      case "F6":
        cmtMessage = "Sure will do bro"
        break;
      case "F8":
        cmtMessage = "Thanks, sure will do bro"
    }
    
document.getElementById("ytcb-text").textContent=cmtMessage;
    
    replyBtn = document.getElementById("ytcb-reply");
    replyBtn.disabled=false;
    simulateClick(replyBtn);
}

  document.getElementById("ytcb-text").addEventListener("keydown",replyFunc)
  
  
  
  
}());