Static class fields can lead to runtime errors

[millsp]

Bug Report

It is permitted not to initialize a static field:

class Foo {
    static bar: string
}

const baz = Foo.bar // inferred string

console.log(typeof baz) // is undefined

🔎 Search Terms

static class field property undefined error assigned

🕗 Version & Regression Information

This bug has always been here, as far as I checked (3.3.3).

• This is a crash
• This is the behavior in every version I tried, and I reviewed the FAQ for entries about Class.

⏯ Playground Link

Playground link with relevant code

💻 Code

class Foo {
    static bar: string
}

const baz = Foo.bar // string

console.log(typeof baz) // undefined

🙁 Actual behavior

undefined values will certainly lead to a program crash.

🙂 Expected behavior

Either to be suggested to assign a default value or to mark the field as optional.

[MartinJohns]

Duplicate of #27899. Search terms: static undefined

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.