Disable Chrome's text input undo/redo (CTRL+Z / CTRL+Y)

var ctrlDown = false;
var ctrlKey = 17, vKey = 86, cKey = 67, zKey = 90;

document.body.onkeydown = function(e) {
  if (e.keyCode == 17 || e.keyCode == 91) {
    ctrlDown = true;
  }
  if ((ctrlDown && e.keyCode == zKey) || (ctrlDown && e.keyCode == vKey) || (ctrlDown && e.keyCode == cKey)) {
    e.preventDefault();
    return false;
  }
}
document.body.onkeyup = function(e) {
  if (e.keyCode == 17 || e.keyCode == 91) {
    ctrlDown = false;
  };
};
<body>
    <input type='text' value='test' />
</body>

Does this work?

Stolen from here, found on here as a comment by @KadeHafen.


You could use onkeydown event, and preventDefault.. eg.

document.onkeydown = function(e) {
  if (e.ctrlKey && e.key === 'z') {
    e.preventDefault();
    alert("CTRL + Z!");
  }
}