Can't run my Node.js Typescript project TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /app/src/App.ts
When I try to start my app on Heroku I got the following stack trace. It is just a basic ts.app like you see with ts-node and nodemon. If you need any more Infos just tell me that because it's my first post. I am really interested in what the answer is going to be.
2020-05-30T00:03:12.201106+00:00 heroku[web.1]: Starting process with command `npm start`
2020-05-30T00:03:14.405285+00:00 app[web.1]:
2020-05-30T00:03:14.405303+00:00 app[web.1]: > [email protected] start /app
2020-05-30T00:03:14.405303+00:00 app[web.1]: > ts-node src/App.ts
2020-05-30T00:03:14.405304+00:00 app[web.1]:
2020-05-30T00:03:14.833655+00:00 app[web.1]: (node:23) ExperimentalWarning: The ESM module loader is experimental.
2020-05-30T00:03:14.839311+00:00 app[web.1]: TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /app/src/App.ts
2020-05-30T00:03:14.839312+00:00 app[web.1]: at Loader.defaultGetFormat [as _getFormat] (internal/modules/esm/get_format.js:65:15)
2020-05-30T00:03:14.839314+00:00 app[web.1]: at Loader.getFormat (internal/modules/esm/loader.js:113:42)
2020-05-30T00:03:14.839315+00:00 app[web.1]: at Loader.getModuleJob (internal/modules/esm/loader.js:244:31)
2020-05-30T00:03:14.839315+00:00 app[web.1]: at processTicksAndRejections (internal/process/task_queues.js:97:5)
2020-05-30T00:03:14.839316+00:00 app[web.1]: at Loader.import (internal/modules/esm/loader.js:178:17)
2020-05-30T00:03:14.847801+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2020-05-30T00:03:14.847998+00:00 app[web.1]: npm ERR! errno 1
2020-05-30T00:03:14.848957+00:00 app[web.1]: npm ERR! [email protected] start: `ts-node src/App.ts`
2020-05-30T00:03:14.849050+00:00 app[web.1]: npm ERR! Exit status 1
2020-05-30T00:03:14.849172+00:00 app[web.1]: npm ERR!
2020-05-30T00:03:14.849254+00:00 app[web.1]: npm ERR! Failed at the [email protected] start script.
2020-05-30T00:03:14.849337+00:00 app[web.1]: npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2020-05-30T00:03:14.854859+00:00 app[web.1]:
2020-05-30T00:03:14.854998+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2020-05-30T00:03:14.855069+00:00 app[web.1]: npm ERR! /app/.npm/_logs/2020-05-30T00_03_14_850Z-debug.log
2020-05-30T00:03:14.907689+00:00 heroku[web.1]: Process exited with status 1
2020-05-30T00:03:14.943718+00:00 heroku[web.1]: State changed from starting to crashed
This is my package.json
{
"name": "discordtoornamentmanager",
"version": "1.0.0",
"description": "",
"main": "dist/app.js",
"type": "module",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"dev": "nodemon -x ts-node src/App.ts",
"start": "ts-node src/App.ts"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"@types/node": "^14.0.5",
"axios": "^0.19.2",
"discord.js": "^12.2.0",
"pg": "^8.2.1",
"reflect-metadata": "^0.1.10",
"typeorm": "0.2.25",
"typescript": "^3.9.3",
"nodemon": "^2.0.4",
"ts-node": "8.10.1"
}
}
And this is my tsconfig
{
"compilerOptions": {
"lib": [
"es6"
],
"target": "es6",
"module": "commonjs",
"moduleResolution": "node",
"outDir": "dist",
"resolveJsonModule": true,
"emitDecoratorMetadata": true,
"esModuleInterop": true,
"experimentalDecorators": true,
"sourceMap": true
},
"include": ["src/**/*.ts"],
"exclude": ["node_modules", "**/*.spec.ts"]
}
Answer
Remove "type": "module" from package.json
https://github.com/TypeStrong/ts-node/issues/935
If you don't want to remove "type": "module" (for example if you're using import statements in your .ts which allows the inference of types from modules), then you can use the following option in tsconfig.json:
{
"compilerOptions": {
"esModuleInterop": true,
}
}
And then you can start the server with the config using ts-node.
Install:
npm install -g ts-node
Run:
ts-node my_server.ts