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I am trying to set up a basic nest.js app.

main.js is in the src folder. I run this command:

  npx ts-node-dev src/main.ts

I get this error:

Cannot find module 'typescript'
Require stack:
- /home/yilmaz/.npm/_npx/429895/lib/node_modules/ts-node-dev/lib/index.js
- /home/yilmaz/.npm/_npx/429895/lib/node_modules/ts-node-dev/lib/bin.js

I installed typescript globally, close the terminal and restart it. run tsc -v and I get "Version 4.3.5" but the error is not resolved.

This is the tsconfig.json:

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es2017",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  }
}

After I installed typescript, I recreated this file with tsc --init and enabled

    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
Yilmaz
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  • maybe you can try `npm link typescript`? – Hyunwoong Kang Jul 28 '21 at 05:16
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    @Yilmaz Are you using node 12 or 14? i encounter this error on those versions before. The solution of mine is either 1) upgrade to `node.js 16` or 2) install and run both ts and ts-node-dev on the fly `npx -p typescript -p ts-node-dev ts-node-dev src/main.ts` – Mic Fung Jul 28 '21 at 06:51
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    `npx -p typescript -p ts-node-dev ts-node-dev src/main.ts` worked me, after installing `rxjs`. – Nuriddin Kudratov Sep 02 '21 at 17:47

1 Answers1

13

I had this problem myself and even tough I didn't clearly understand the main cause, I did the following stuff and it worked out.

So basically I have installed the ts-node-dev package as a dev dependency(npm i --save-dev ts-node-dev), and after that was running into another error regarding rxjs, so I just installed that too as a dependency(npm i rxjs) and after that it worked ts-node-dev as well as npx ts-node-dev

Ion Harea
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