feat(xor): show derived types instead of type names on hover

maninak · Feb 10, 2023 · b312336 · b312336
1 parent 60f4a7e
commit b312336
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/src/types/Prettify.type.ts b/src/types/Prettify.type.ts
@@ -0,0 +1,7 @@
+/**
+ * Resolve mapped types and show the derived keys and their types when hovering in
+ * VS Code, instead of just showing the names those mapped types are defined with.
+ */
+export type Prettify<T> = {
+  [K in keyof T]: T[K]
+} & {}
diff --git a/src/types/Xor.type.ts b/src/types/Xor.type.ts
@@ -1,3 +1,4 @@
+import { Prettify } from './Prettify.type'
 import { Without } from './Without.type'
 
 /**
@@ -11,5 +12,5 @@ import { Without } from './Without.type'
  * More: https://github.com/maninak/ts-xor/tree/master#description
  */
 export type XOR<T, U> = (T | U) extends object
-  ? (Without<T, U> & U) | (Without<U, T> & T)
+  ? (Prettify<Without<T, U> & U>) | (Prettify<Without<U, T> & T>)
   : T | U