Typescript is not showing the "X is possibly 'undefined'" error for some reason

[orchid plaza]

This is not giving me an error for some reason (see screenshot). Although it does error in typescript playground (https://www.typescriptlang.org/play?#code/ATAuE8AcFNgMQPYOAXmAbwFAhAIwIYBOA-AFwbY574Be5AzqIQJYB2A5gNyUgC+3fbpQDGCVo2AAzJKgy9g+evCQCpSAHQFCm2pyA)

Is there some config that I need to enable? I'm confused by why this doesn't work for me.

[polar trench]

@orchid plaza Here's a shortened URL of your playground link! You can remove the full link from your message.

DaveJ#1185

Playground Link

Preview:```ts
type Foo = {
bar?: {
baz: string
}
}

const foo = {} as Foo
foo.bar.baz```

You can choose specific lines to embed by selecting them before copying the link.

[lilac basalt]

uh because it is?

foo.bar is optional, so it's possibly undefined

it's from strictNullChecks i believe

oh i misread the issue, i had it reversed lmao

[orchid plaza]

I think your misunderstanding. I want to see the error but my editor is not showing the error

[lilac basalt]

i thought it wasn't erroring in the playground

yeah

you need to set strict/strictNullChecks

brainfart, mb

[orchid plaza]

Is it not enabled by default?

Will try setting it now.

Ok, that works. I assumed that a rule like this would be enabled by default. 🤔

!resolve

[lilac basalt]

a lot of the stricter ones aren't, but are on the playground

!hb tsconfig reference

[polar trench]

Project Configuration / What is a tsconfig.json

TSConfig Reference

[lilac basalt]

might want to check that

[orchid plaza]

Thanks, yeah I assumed strictNullChecks would be pretty important. Big source of "can not read x of undefined" errors.