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Discussion on: Getting Started With TypeScript

 
tylim88 profile image
Acid Coder • Edited

ts-expect-error will report if there is no error.
Unused '@ts-expect-error' directive
Which can be solved with
// @ts-ignore
It’s a choice of course

which is why you should only use it on line that has error

normally // @ts-ignore is not desirable because it is not granular, it will just ignore everything and will ignore thing that you don't want to ignore (but is ok in this case)

and because of granularity // @ts-expect-error is very useful in type testing

True Sorry my mistake. Object keys is always a string.

object key can be numeric, it will be converted to string on runtime

type wise key type of both {[x:string]:unknown} and {[x:string | number ]:unknown} are string | number

which is why I said it is unnecessary, not incorrect

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rkallan profile image
RRKallan

TS expect / ignore

The ideas which when to use, have you points to add? Or other advice?

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tylim88 profile image
Acid Coder

a good analogy is something like const and let vs var

in what case you need var? almost none

so I never use ts ignore, I only use ts expect error

if you find yourself in need of ts ignore, you probably need refactoring or you have compatibility issue