This repository was archived by the owner on Oct 12, 2022. It is now read-only.
Repository navigation
This repository was archived by the owner on Oct 12, 2022. It is now read-only.
Misstatement in definition of Partial<T> #1308
Description
The definition of Partial<T> states:
Constructs a type with all properties of T set to optional. This utility will return a type that represents all subsets of a given type.
To paraphrase Inigo Montoya: You use the word "subset". I do not think it means what you think it means.
A "type with all properties of T set to optional" does not represent subsets of T.
Examples of "subsets of a given type":
- given type:
real number, some subsets:rational number,integer - given type:
number | string | null, some subsets:number,number | null
I know what the author is trying to say, but can't come up with the right words, though I probably should have spent more time on that than what I've put into this Issue so far 😂.
Activity
jpelton-stroud commentedon May 3, 2020
Now that you've brought it up, I've realized I have no idea what the author is trying to say in the second sentence.
Partial<T>only returns the params of the targeted type with theoptionalflag on each one, doesn't it? Does something else happen if the targeted type isn't an object literal?