How to enble/disable a button in TypeScript 1.5?

There should be a cleaner way to do this:

var element = <HTMLInputElement> document.getElementById("btnExcel");
element.disabled = true;

Or if you prefer a one liner:

(<HTMLInputElement> document.getElementById("btnExcel")).disabled = true;

It seems getElementById and the like should be a generic method and accept a type parameter. That said, a generic method wouldn't give you anything that typecasting doesn't.

I'm using "typescript": "~3.8.3" in Angular 9. To disable a button successfully try:

let button = <HTMLButtonElement> document.getElementById('confirmBtn');
button.disabled = true;

I'm using TypeScript v 3.7.something. In here

(document.getElementById('button') as HTMLInputElement).disabled = false;

is prefered. (guided by @Martin's answer)