feat(typescript): migrate to typescript

.circleci/config.yml

@@ -9,6 +9,7 @@ workflows:
         jobs:
             - node/test
             - release/npm_and_github:
+                  build_command: npm run build
                   context:
                       - org-global
                       - github-release

.eslintrc.json

@@ -1,7 +1,9 @@
 {
 	"root": true,
-	"extends": ["5app", "prettier"],
-	"plugins": ["prettier"],
+	"parser": "@typescript-eslint/parser",
+	"plugins": ["@typescript-eslint", "prettier"],
+	"extends": ["5app", "plugin:@typescript-eslint/recommended", "prettier"],
+	"ignorePatterns": ["dist/"],
 	"rules": {
 		"prettier/prettier": "error"
 	}

.gitignore

@@ -1,3 +1,4 @@
 node_modules/
 .DS_Store
-.nyc_output
+.nyc_output
+dist/

example.ts

@@ -0,0 +1,31 @@
+/* eslint-disable no-console */
+import memoize from './src/index.js';
+
+// Define a function which returns an object
+type ProfileId = number;
+interface Profile {
+	id: ProfileId;
+	name: string;
+	age: number;
+}
+
+async function getMyProfile(id: ProfileId): Promise<Profile> {
+	return {
+		id,
+		name: 'Andrew',
+		age: 100,
+	};
+}
+
+const memoProfile = memoize(getMyProfile, {
+	useCached(param) {
+		return param.timestamp ? param.timestamp > Date.now() : false;
+	},
+	getKey(param) {
+		return param[0];
+	},
+});
+
+const resp = await memoProfile(123);
+
+console.log(resp?.id);