typeof ignoring early return when used in object with string keys

[equal-matt]

Bug Report

🔎 Search Terms

typeof, guard, early return, object, keys, null

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about everything(?)

⏯ Playground Link

Playground link with relevant code

💻 Code

function doSomething() {
    const myThing = Math.random() > 0.5 ? { foo: 'bar' } : null;
    if (!myThing) return;

    const okayThing: { foo: typeof myThing.foo } = { foo: 'bar' }
    const notOkayThing: { [key: string]: typeof myThing.foo } = { foo: 'bar' }
    // Error: Object is possibly 'null'
}

🙁 Actual behavior

notOkayThing errors with Object is possibly 'null'.

🙂 Expected behavior

Types for values in okayThing and notOkayThing should be equivalent.

[ritikBhandari]

hi,
Can i try to solve this issue?

[Blopaa]

@ritikBhandari are you working on this issue ? If not I would like to try to resolve the issue.

[ritikBhandari]

@Blopaa I'm working on another issue. You can try it! :)