HTMLScriptElement and HTMLStyleElement type definition does not allow to specify "nonce" attribute

[DethAriel]

According to this MDN page, "nonce" is a valid attribute for a <script> element.
This page says the same about <style> element.

TypeScript Version: 2.9.0-dev.20180516

Search Terms:

• "nonce" - 2 issues, both irrelevant
• "HTMLScriptElement"

Code

declare var scriptElement: HTMLScriptElement;
declare var styleElement: HTMLStyleElement;
scriptElement.nonce = "someValue";
styleElement.nonce = "someValue";

A fully-functional local example can be created like this (verified on MacOS):

mkdir nonce-test
cd nonce-test/
yarn init -p -y
yarn add typescript@next

touch test.ts
echo 'declare var scriptElement: HTMLScriptElement;' >> test.ts
echo 'declare var styleElement: HTMLStyleElement;' >> test.ts
echo 'scriptElement.nonce = "someValue";' >> test.ts
echo 'styleElement.nonce = "someValue";' >> test.ts

yarn tsc test.ts --target ES6 --noEmit 

Expected behavior:

the command

tsc test.ts --target ES6 --noEmit 

should complete without errors

Actual behavior:

There are two errors reported:

test.ts:3:15 - error TS2339: Property 'nonce' does not exist on type 'HTMLScriptElement'.

3 scriptElement.nonce = "someValue";
                ~~~~~


test.ts:4:14 - error TS2339: Property 'nonce' does not exist on type 'HTMLStyleElement'.

4 styleElement.nonce = "someValue";
               ~~~~~

Playground Link:
http://www.typescriptlang.org/play/index.html#src=declare%20var%20scriptElement%3A%20HTMLScriptElement%3B%0D%0Adeclare%20var%20styleElement%3A%20HTMLStyleElement%3B%0D%0AscriptElement.nonce%20%3D%20%22someValue%22%3B%0D%0AstyleElement.nonce%20%3D%20%22someValue%22%3B

Related Issues:

Although issue #8955 and pr #8956 are not related to this particular issue, they deal with a very similar problem of having incomplete typings

[mhegazy]

PRs welcomed. You can find more information about contributing lib.d.ts fixes at https://github.com/Microsoft/TypeScript/blob/master/CONTRIBUTING.md#contributing-libdts-fixes.