TYPESCRIPT is-ime-composing.ts
export function isIMEComposing(event: KeyboardEvent) {
// Check for IME composition using isComposing property and keyCode 229 (specifically for IME composition on Safari, which is notorious for not supporting KeyboardEvent.isComposing)
// This prevents form submission when confirming IME word selection (e.g., Japanese/Chinese input)
return event.isComposing || event.keyCode === 229;
}