Detect Caps Lock with JavaScript

No one is capable of keeping their hats at any time without realizing it at any time. Users can easily lock unwanted hats when typing in most input, but when using one password inputThe problem is not so clear. This makes the user’s password wrong, which is angry. Ideally developers can tell the user that their hats are activated the lock key.

To find out if a user has their keyboard hats on the lock on, we will work KeyboardEvent‘ getModifierState Method: method

document.querySelector('input[type=password]').addEventListener('keyup', function (keyboardEvent) {
    const capsLockOn = keyboardEvent.getModifierState('CapsLock');
    if (capsLockOn) {
        // Warn the user that their caps lock is on?
    }
});

I have never seen getModifierState Used to be used earlier, so I found it W3C Documents To discover other useful values:

dictionary EventModifierInit : UIEventInit {
  boolean ctrlKey = false;
  boolean shiftKey = false;
  boolean altKey = false;
  boolean metaKey = false;

  boolean modifierAltGraph = false;
  boolean modifierCapsLock = false;
  boolean modifierFn = false;
  boolean modifierFnLock = false;
  boolean modifierHyper = false;
  boolean modifierNumLock = false;
  boolean modifierScrollLock = false;
  boolean modifierSuper = false;
  boolean modifierSymbol = false;
  boolean modifierSymbolLock = false;
};

getModifierState The key focus provides insights about the user’s keyboard during the events. I wish I had known about it getModifier First in my career!