JavaScript 在JavaScript中仅检测onkeydown / onkeyup / onkeypress上的实际文本更改

Posted 2021-05-20

if (
  (e.keyCode != 32) && // not spacebar
  (e.keyCode != 8) &&  // not backspace
  (e.keyCode != 46) && // not delete
  ((e.keyCode < 48) || (e.keyCode > 90)) // non-character
) return true;