防止keydown事件javascript

Question

Hello i was just wondering is there away to prevent keydown events if or when input is in focus and typing

 window.addEventListener("onkeydown", keyDown, true); window.addEventListener("keydown", keyDown); function keyDown() { var e = window.event; switch (e.keyCode) { case 188: runon(); break; case 190: runoff(); break; case 187: partyon(); break; case 189: partyoff(); break; case 192: leaderboard(); break; } } 

 <input type="text" name="message" class="chat-input" placeholder="Enter your chat message..." maxlength="140"> 

Answer 1

You can simply add e.preventDefault(); in your default block like this and it will serve the purpose:

switch (e.keyCode) {
case 188:
  runon();
  break;
case 190:
  runoff();
  break;
case 187:
  partyon();
  break;
case 189:
  partyoff();
  break;
case 192:
  leaderboard();
  break;
default:
 e.preventDefault();

}

Hope this helps.