It just doesn't work

Trying to make your lib work, but have a couple of problems Problem one: internal/modules/cjs/loader.js:1102 throw new ERR_REQUIRE_ESM(filename, parentPath, packageJsonPath); ^

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: D:\CODE\node_modules\node-fetch\src\index.js require() of ES modules is not supported. require() of D:\CODE\node_modules\node-fetch\src\index.js from D:\CODE\dist\index.js is an ES module file as it is a .js file whose nearest parent package.json contains “type”: “module” which defines all .js files in that package scope as ES modules. Instead rename D:\CODE\node_modules\node-fetch\src\index.js to end in .cjs, change the requiring code to use import(), or remove “type”: “module” from D:\CODE\node_modules\node-fetch\package.json.

At the end of the log it has some instructions, I followed it but it has another error:

TypeError: (0 , node_fetch_1.default) is not a function
    at D:\CODE\dist\index.js:30:34
    at Layer.handle [as handle_request] (D:\CODE\node_modules\express\lib\router\layer.js:95:5)
    at next (D:\CODE\node_modules\express\lib\router\route.js:137:13)
    at Route.dispatch (D:\CODE\node_modules\express\lib\router\route.js:112:3)
    at Layer.handle [as handle_request] (D:\CODE\node_modules\express\lib\router\layer.js:95:5)
    at D:\CODE\node_modules\express\lib\router\index.js:281:22
    at Function.process_params (D:\CODE\node_modules\express\lib\router\index.js:335:12)
    at next (D:\CODE\node_modules\express\lib\router\index.js:275:10)
    at D:\CODE\dist\index.js:27:9
    at Layer.handle [as handle_request] (D:\CODE\node_modules\express\lib\router\layer.js:95:5)
    at trim_prefix (D:\CODE\node_modules\express\lib\router\index.js:317:13)
    at D:\CODE\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (D:\CODE\node_modules\express\lib\router\index.js:335:12)
    at next (D:\CODE\node_modules\express\lib\router\index.js:275:10)
    at D:\CODE\node_modules\express\lib\router\index.js:635:15
    at next (D:\CODE\node_modules\express\lib\router\index.js:260:14)

Reproduction Just trying to fetch with your lib, doesn’t work. You might be interested to hear that I use TS, and I have something called tsc - watch that converts TS code to JS, this might have something to do with the problems above.

Expected behavior It should work.

Hope you can fix this soon.

[LinusU]

@ImperatorOfIntellectualism here is a diff that makes it work for me:

diff --git a/KEKW/package.json b/KEKW/package.json
index 7ed9245..e787c74 100644
--- a/KEKW/package.json
+++ b/KEKW/package.json
@@ -3,10 +3,11 @@
   "version": "1.0.0",
   "description": "",
   "main": "index.js",
+  "type": "module",
   "scripts": {
     "watch": "tsc -w",
-    "test": "nodemon dist/index.js",
-    "start": "ts-node src/index.ts",
+    "test": "NODE_OPTIONS=--experimental-specifier-resolution=node nodemon dist/index.js",
+    "start": "node --loader ts-node/esm --experimental-specifier-resolution=node src/index.ts",
     "migration": "mikro-orm migration:create"
   },
   "author": "",
diff --git a/KEKW/src/index.ts b/KEKW/src/index.ts
index f0ae144..19854f4 100644
--- a/KEKW/src/index.ts
+++ b/KEKW/src/index.ts
@@ -9,7 +9,7 @@ import { PostResolver } from './resolvers/post';
 import { UserResolver } from './resolvers/user';
 import { ThreadResolver } from './resolvers/thread';
 import { BoardResolver } from './resolvers/board';
-import fetch from '../node_modules/node-fetch';
+import fetch from 'node-fetch';
 
 //Persist And Flush - adds model to the table
 
@@ -18,7 +18,7 @@ const main = async ( ) => {
     const apolloServer = new ApolloServer({schema: await buildSchema({resolvers: [HelloResolver, PostResolver, UserResolver, ThreadResolver, BoardResolver], validate: false}), context: () => ({em: orm.em})})
     await apolloServer.start();
     apolloServer.applyMiddleware({app})
-    const orm = await MikroORM.init(config) 
+    const orm = await MikroORM.init(config)
     await orm.getMigrator().up()
 
     app.use(function(_, res, next) {
diff --git a/KEKW/src/mikro-orm.config.ts b/KEKW/src/mikro-orm.config.ts
index 32c7316..28a0ee7 100644
--- a/KEKW/src/mikro-orm.config.ts
+++ b/KEKW/src/mikro-orm.config.ts
@@ -1,14 +1,14 @@
 import { __prod__ } from "./constants";
 import { Post } from "./entities/Post";
 import { MikroORM } from "@mikro-orm/core";
-import path from 'path'
 import { User } from "./entities/User";
 import { Thread } from "./entities/Thread";
 import { Board } from "./entities/Board";
+import { URL, fileURLToPath } from "url";
 
 export default {
     migrations: {
-      path: path.join(__dirname + '/migrations'), // path to the folder with migrations
+      path: fileURLToPath(new URL('migrations', import.meta.url)), // path to the folder with migrations
       pattern: /^[\w-]+\d+\.[tj]s$/, // regex pattern for the migration files
     },
     entities: [Post, User, Thread, Board],
diff --git a/KEKW/tsconfig.json b/KEKW/tsconfig.json
index 3b3e51b..2e4b5f1 100644
--- a/KEKW/tsconfig.json
+++ b/KEKW/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "es2017",
-    "module": "commonjs",
+    "module": "ES2020",
     "lib": ["dom", "es6", "es2017", "esnext.asynciterable"],
     "skipLibCheck": true,
     "sourceMap": true,

With this both ts-node for running the TS files directly and nodemon on the built files works.

---

--experimental-specifier-resolution=node is needed because you aren’t specifying a file extension when importing files. That is import config from './mikro-orm.config' instead of import config from './mikro-orm.config.js'. I would recommend adding the file extension to the import, since that seems to be what Node.js is recommending going forward.

[jimmywarting]

The reason why I’m using '../node_modules/node-fetch' is because it can’t find it otherwise.

This is the problem… you shouldn’t have to do '../node_modules/ then you are probably standing in the wrong working directory. Or you haven’t installed the dependency if anything then it should be ../node_modules/node-fetch/src/index.js but you shouldn’t have to do this…

i just tried my above suggestion to make sure that it did work, and it did…

npm init -y
npm i node-fetch
node -e "new Function('modulePath', 'return import(modulePath)')('node-fetch').then(console.log)"

also tried sticking the code in a js file and executing node ./index.js