Typescript: DomTokenList has no method "forEach"

[marvinside]

TypeScript Version: 3.1.0-dev.20180726
Search Terms: DomTokenList forEach classList

Code

const body:HTMLElement = document.body;

body.classList.forEach((attr)=>{
    /* Some code */
);

Expected behavior:
File just Compiles wwithout generating an error according to https://developer.mozilla.org/de/docs/Web/API/DOMTokenList/forEach
Actual behavior:

client/main.ts:24:20 - error TS2339: Property 'forEach' does not exist on type 'DOMTokenList'.

24                      body.classList.forEach((attr)=>{
                                       ~~~~~~~

Playground Link:
https://www.typescriptlang.org/play/#src=.....

The file from where VS Code loads the DOMTokenList is: /usr/share/code/resources/app/extensions/node_modules/typescript/lib/lib.dom.d.ts

[cevek]

Also it needs to be added: supports, entries, keys, values
https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList

[mhegazy]

Should be fixed by https://github.com/Microsoft/TypeScript/pull/25944