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How to scope Typecheck to your project folder

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This article is about: javascripttypescript


Published on Tuesday, 31 March 2020

I configured a command so that I can run a type check on my project, but the results always include stuff in the node_modules folder. It took me a lot of investigation and asking around before I figured out how to scope tsc to only the ./src/ folder?

in package.json:

"scripts: {
  "typecheck": "tsc --noEmit"
}

With this configuration, he compiler should pick up config from tsconfig.json, which looks like this:

{
  "compilerOptions": {
  ...
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "**/*.test.*"]

But I still get results from node_modules when I run the command. It took me ages to figure it out, but for anyone else coming across this one, I managed to find that submitting an empty array to types did it:

"compilerOptions": {
    "types": []
}
```"

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