Adding Window.event Handler To Typescript


Answer :

This 

window.addEventListener('keydown', keyDownListener, false)

window is defined will all events in lib.d.ts and this particular listener as 

 addEventListener(type: "keydown", listener: (ev: KeyboardEvent) => any, useCapture?: boolean): void;

or this, if you want to keep your original "style",

window.onkeydown = (ev: KeyboardEvent): any => {      //do something }

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