fix: ts-node & lodash & esm ✅

TypeStrong/ts-node#1062 (comment)

https://www.cnblogs.com/xgqfrms/p/17245062.html

README.md

@@ -46,11 +46,30 @@ $ npx tsc --init
 ## dev
 
 ```sh
+# cjs
 $ yarn dev
-# $ yarn esm
 $ yarn app
 
 $ npx ts-node ./src/index.ts
 $ npx ts-node ./src/app.ts
 
-```
+
+# esm
+$ yarn dev-esm
+$ yarn app-esm
+
+$ npx ts-node-esm ./src/index.ts
+$ npx ts-node-esm ./src/app.ts
+
+```
+
+> fefs
+
+https://typestrong.org/ts-node/docs/imports/
+
+https://github.com/TypeStrong/ts-node/issues/1062#issuecomment-1094296803
+
+https://github.com/xgqfrms/one-line-awesome-js-code/issues/1
+
+https://www.cnblogs.com/xgqfrms/p/17242430.html#5160592
+

env.js → env.ts

@@ -1,3 +1,3 @@
 // default
 const NODE_ENV = 'dev';
-module.exports = NODE_ENV;
+export default NODE_ENV;

package.json

@@ -5,7 +5,8 @@
   "main": "./src/index.ts",
   "type": "module",
   "scripts": {
-    "esm": "npx ts-node-esm ./src/index.ts",
+    "dev-esm": "npx ts-node-esm ./src/index.ts",
+    "app-esm": "npx ts-node-esm ./src/app.ts",
     "dev": "npx ts-node ./src/index.ts",
     "app": "npx ts-node ./src/app.ts",
     "test": "echo \"Error: no test specified\" && exit 1"

src/app.ts

@@ -1,7 +1,7 @@
 
 import {toString as ToString} from "lodash-es";
 
-import toString from "lodash-es/toString";
+// import toString from "lodash-es/toString";
 
 
 type Obj = {
@@ -15,9 +15,9 @@ const obj: Obj = {
 };
 
 const str1 = ToString(obj);
-const str2 = toString(obj);
+// const str2 = toString(obj);
 
-console.log(`ToString =`, str1);
-console.log(`toString =`, str2);
+console.log(`ToString =`, JSON.stringify(str1));
+// console.log(`toString =`, str2);
 
 export {}

src/index.ts

@@ -1,6 +1,20 @@
 
 import _ from "lodash";
 // import _, {toString} from "lodash";
+
+const { toString } = _;
+
+/*
+
+SyntaxError: Named export 'toString' not found.
+The requested module 'lodash' is a CommonJS module, which may not support all module.exports as named exports.
+CommonJS modules can always be imported via the default export, for example using:
+
+import pkg from 'lodash';
+const { toString } = pkg;
+
+*/
+
 /*
 
 (node:19404) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
@@ -14,7 +28,7 @@ SyntaxError: Cannot use import statement outside a module
 */
 
 // ✅
-import toString from "lodash/toString";
+// import toString from "lodash/toString";
 
 // import toString from "lodash/tostring";
 // const toString = require("lodash/toString");

tsconfig.json

@@ -13,7 +13,7 @@
     "skipLibCheck": true
   },
   // "ts-node": {
-  //     "esm": true
+  //   "esm": true
   // },
   // "lib": ["esnext"]
 }