[react-cache] Add typings for react-cache (#30446)

* Generate the standard tsconfig/tslint types

* Add the core types for react-cache

* Add test code for react-cache types

* Add strictFunctionTypes to tsconfig

* Resolve linting warnings

* Use global PromiseLike type

types/react-cache/index.d.ts

@@ -0,0 +1,14 @@
+// Type definitions for react-cache 2.0
+// Project: https://github.com/facebook/react/tree/master/packages/react-cache
+// Definitions by: Spencer Miskoviak <https://github.com/skovy>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export interface Resource<Input, Value> {
+  read(key: Input): Value;
+  preload(key: Input): void;
+}
+
+export function unstable_createResource<Input, Value>(
+  fetch: (input: Input) => PromiseLike<Value>,
+  maybeHashInput?: (input: Input) => string | number
+): Resource<Input, Value>;

types/react-cache/react-cache-tests.ts

@@ -0,0 +1,25 @@
+import { unstable_createResource } from "react-cache";
+
+const fetchName = (name: string) =>
+    new Promise<string>((resolve, reject) => {
+        if (name === "Bob") {
+            resolve(name);
+        } else {
+            reject(`Invalid name: ${name}`);
+        }
+    });
+
+const nameResource = unstable_createResource(fetchName);
+nameResource.read("Bob");
+
+const fetchUser = ({ name }: { name: string }) =>
+    new Promise<string>((resolve, reject) => {
+        if (name === "Jill") {
+            resolve(name);
+        } else {
+            reject(`Invalid name: ${name}`);
+        }
+    });
+
+const userResource = unstable_createResource(fetchUser, ({ name }) => name);
+userResource.read({ name: "Jill" });

types/react-cache/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "react-cache-tests.ts"
+    ]
+}

types/react-cache/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }