Add types for use-sync-external-store package

Author: markerikson

tsconfig.json

@@ -12,7 +12,11 @@
     "emitDeclarationOnly": true,
     "outDir": "./es",
     "forceConsistentCasingInFileNames": true,
-    "experimentalDecorators":true
+    "experimentalDecorators": true,
+    "typeRoots": [
+      "./node_modules/@types",
+      "./types"
+    ]
   },
   "include": ["src/**/*", "test/**/*", "types"],
   "exclude": ["node_modules", "dist"]

types/index.d.ts

@@ -1,11 +1,3 @@
-/* eslint-disable no-unused-vars */
-
-declare module 'react-is' {
-  import * as React from 'react'
-  export function isContextConsumer(value: any): value is React.ReactElement
-  export function isValidElementType(value: any): value is React.ElementType
-}
-
 /* eslint-disable import/no-unresolved */
 import {} from 'react/next'
 

types/use-sync-external-store/index.d.ts

@@ -0,0 +1,19 @@
+/* eslint-disable no-unused-vars */
+
+type VoidFunc = () => void
+
+declare module 'use-sync-external-store' {
+  export function useSyncExternalStore<T>(
+    subscribe: (VoidFunc) => VoidFunc,
+    getSnapshot: () => T
+  ): T
+}
+
+declare module 'use-sync-external-store/extra' {
+  export function useSyncExternalStoreExtra<Snapshot, Selection>(
+    subscribe: (VoidFunc) => VoidFunc,
+    getSnapshot: () => Snapshot,
+    selector: (snapshot: Snapshot) => Selection,
+    isEqual?: (a: Selection, b: Selection) => boolean
+  ): Selection
+}