`SimplifyUnion`

[benzaria]

Type description + examples

A type that simplify a union. When merging 2 of more unions TS hide the underline types.
use case:

type U1 = 5 | ['b'] | symbol
type U2 = null | '2' | {foo: 'bar'}

type U3 = U1 | U2
//	  ^? U3 = U1 | U2 

type U4 = SimplifyUnion<U3>
//	  ^? U4 = symbol | 5 | "2" | ["b"] | {foo: "bar"} | null

Type source

type SimplifyUnion<T> = {[K in T as string]: K}[string]

Search existing types and issues first

• I tried my best to look for it

[sindresorhus]

Any thoughts on whether it should be part of the existing Simplify type? And if not, why?

[benzaria]

Any thoughts on whether it should be part of the existing Simplify type? And if not, why?

yeah we can merge the two in one Simplify that will work!

[sindresorhus]

Are there any downsides with merging them? Would be good to do some research.

[benzaria]

Are there any downsides with merging them? Would be good to do some research.

@sindresorhus I did try to merge the two but it looks like it over complicated them #1178 i will figure out if there is a way to achieve the merge if not it's better keeping them separated.