TypeScript scratch files: TS2304: Cannot find name Record

Hi all,

I'm a long-time WebStorm user, but unfortunately of recent memory, I can't seem to run TypeScript scratch files, and I get various errors with JavaScript too.

Consider the following code:

type Handler = () => Promise<true>

type Handlers = Record<string, Handler>

const handlers: Handlers = {
  foo: () => true
}

The first line errors:

TS2583: Cannot find name Promise. Do you need to change your target library? Try changing the lib compiler option to es2015 or later.

The second line errors:

TS2304: Cannot find name Record

I'm already running in a TypeScript Project, but I'm 99% sure I used to write and run big complex TypeScript scratch files, pretty much anywhere.

Thanks,

Dave