EventModifierInit
interface EventModifierInit extends UIEventInit {
altKey?: boolean;
ctrlKey?: boolean;
metaKey?: boolean;
modifierAltGraph?: boolean;
modifierCapsLock?: boolean;
modifierFn?: boolean;
modifierFnLock?: boolean;
modifierHyper?: boolean;
modifierNumLock?: boolean;
modifierScrollLock?: boolean;
modifierSuper?: boolean;
modifierSymbol?: boolean;
modifierSymbolLock?: boolean;
shiftKey?: boolean;
}