2y ago

I am writing this nodeJS project, and I wanted to include the typescript mastodon library but it keeps telling me this. I am kinda unsure how to proceed.

Error [ERR_REQUIRE_ESM]: require() of ES Module /home/sky/Documents/hourlypets/node_modules/tsl-mastodon-api/lib/index.js from /home/sky/Documents/hourlypets/src/mastodon.ts not supported. Instead change the require of index.js in /home/sky/Documents/hourlypets/src/mastodon.ts to a dynamic import() which is available in all CommonJS modules. at require.extensions. [as .js] (/usr/lib/node_modules/ts-node/dist/index.js:851:20) at Object. (/home/sky/Documents/hourlypets/src/mastodon.ts:36:31) at m._compile (/usr/lib/node_modules/ts-node/dist/index.js:857:29) at require.extensions. [as .ts] (/usr/lib/node_modules/ts-node/dist/index.js:859:16) at Object. (/home/sky/Documents/hourlypets/src/bot.ts:13:20) at m._compile (/usr/lib/node_modules/ts-node/dist/index.js:857:29) at require.extensions. [as .ts] (/usr/lib/node_modules/ts-node/dist/index.js:859:16) at phase4 (/usr/lib/node_modules/ts-node/dist/bin.js:466:20) at bootstrap (/usr/lib/node_modules/ts-node/dist/bin.js:54:12) at main (/usr/lib/node_modules/ts-node/dist/bin.js:33:12) at Object. (/usr/lib/node_modules/ts-node/dist/bin.js:579:5) { code: 'ERR_REQUIRE_ESM' } I am importing the lib like this

import * as Mastodon from 'tsl-mastodon-api';

15 comments

This is usually a side effect of the uneven adoption of ESM vs CommonJS and mixing of the two. It's a bit annoying, but, usually fairly easy to work around. But, a lot of it depends on how your project is configured - both the package.json and tsconfig.
Do you have the code available somewhere? I'm mostly interested in the package.json (specifically the type property) and tsconfig if you have one (and this is Typescript). Also, is this a Typescript project or a regular Javascript project?
Sorry, there's several variables here that affect the proper solution.
EDIT : One more question. If this is a Typescript project, how are you executing it? Transpile then run with node? ts-node? ts-node-esm?
EDIT x2 : If you'll throw the project, or a simplified example that demonstrates the problem, up on github or somewhere else publicly accessible we should be able to fix you up pretty quickly. You can exclude the node_modules/ folder.
- __{ "name": "hourlypets", "version": "1.0.0", "description": "A bot for displaying hourly pets", "main": "dist/index.js", "scripts": { "start": "node dist/index.js", "test": "echo \"Error: no test specified\" && exit 1" }, "keywords": [], "author": "", "license": "ISC", "devDependencies": { "@types/node": "^20.5.1", "typescript": "^5.1.6" }, "dependencies": { "@petfinder/petfinder-js": "^1.0.6", "dotenv": "^16.3.1", "tsl-mastodon-api": "^0.4.0" } } _
  { "compilerOptions": { "module": "es6", "esModuleInterop": true, "target": "es6", "moduleResolution": "node", "sourceMap": true, "outDir": "dist" }, "lib": ["es2015"] }
- I am using ts-node
  
  Hehe, this is the same type of answer I get from clients when I ask more than one question at a time 😆
  Do you have answers to the other questions? Or, much better, can you post the code including your package.json and tsconfig to github/etc?
from the error it looks like you're importing an es module inside a common.js environment. but as @clif@lemmy.world said, there are several things that could cause this.
- That's exactly what I have been dealing with I believe.
My first impression is that it says you're trying to load an ES Module using a CommonJS require() call. Evidently from your code snippet, that's not the case. My guess would be that Typescript is transpiling your code to CommonJS modules, and that the library you're trying to import only exports ES modules (or at-least that's what NodeJS is trying to import for one reason or another).
You may have to modify something in your tsconfig.json file to tell it to transpile to ESM instead of CommonJS.
I don't know how to help you directly, but when I get a strange error message I try to search for it, e.g. search for "Error [ERR_REQUIRE_ESM]: require() of ES Module".
Or read the sentence that says "Instead change the require of index.js..." and do like it says. If you don't know what a "dynamic import()" is (I also don't know what it is), google for that.
Update: updated some thing in my ts-config, I need to complie it down to javascript now but it works. I use tsc to compile it

15 comments