Handling Input Events

Input event types
Category	Event types
Keyboard	keydown, keyup (keypress deprecated)
Mouse	click, contextmenu, mouseenter, wheel
Pointer, touch	pointerdown ... (Touch Events, Pointer Events)
Text entry	beforeinput, input, change, compositionend

A Ctrl+S (Cmd+S on macOS) shortcutJavaScript

document.addEventListener("keydown", (e) => {
  if (e.key !== "s" || !(e.ctrlKey || e.metaKey) || e.isComposing) return;
  e.preventDefault();            // suppress the browser's Save Page dialog
  saveDraft();
});

key is the character produced (layout-aware); code is the physical key ("KeyS"), better for games. isComposing is true while a Chinese or Japanese input method is composing.

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