[docs]: Documentation for $Exact<T>

facebook · Dec 8, 2016 · 5b52264 · 5b52264
1 parent 1c4595c
commit 5b52264
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/website/docs/ref/utility-types.doc.js b/website/docs/ref/utility-types.doc.js
@@ -231,3 +231,14 @@ class DataStore {
     this.data.isOffline = 'SomeStore'; // oops, wrong key!
   }
 }
+
+/*
+## `$Exact<T>`
+`$Exact<{name: string}>` is a synonym for `{| name: string |}` as in the [Object documentation](objects.html#exact-object-types).
+*/
+
+type ExactUser = $Exact<{name: string}>;
+type ExactUserShorthand = {| name: string |};
+
+const user2: ExactUser = {name: 'John Wilkes Booth'};
+(user2: ExactUserShorthand);