TypeScript Version: 2.4.0

Code

let a = document.querySelectorAll("a");
let div = a.closest("div");

Expected behavior:

a is an HTMLAnchorElement, and div is an HTMLDivElement.

Actual behavior:

el2 is actually an Element because Element.closest always returns an Element. This was fixed for querySelector in #8114 and the same behavior should be applied to closest.