What type does `getBoundingClientRect()` return?

Question

Maybe this is a stupid question.

What type does getBoundingClientRect() return? I have the following errors:

var logo1: HTMLElement = document.getElementById('test'); 
var logo1TextRectangle: DOMRect = logo1.getBoundingClientRect(); <- error

error TS2304: Cannot find name 'DOMRect'.

I watch this https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect

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var logo1TextRectangle: nsIDOMClientRect = logo1.getBoundingClientRect(); <- error

error TS2304: Cannot find name 'nsIDOMClientRect'.

and this https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIDOMClientRect

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I know I can just use this:

var logo1TextRectangle: any = logo1.getBoundingClientRect();

but can anybody tell me what is the returned type, or tell me a link where I can take a look to the returned types. Thanks and sorry for my English.

Answer 1

What kind returns getBoundingClientRect()

It returns DOMRect:

const logo1: HTMLElement = document.getElementById('test'); 
const logo1TextRectangle: DOMRect = logo1.getBoundingClientRect();

More

FWIW you can let the compiler infer it for you :

const logo1: HTMLElement = document.getElementById('test'); 
const logo1TextRectangle: DOMRect = logo1.getBoundingClientRect();

And if you hover over the variable you will see that its correctly inferred: