Cannot find module 'fs' Error in TypeScript

Cannot find module 'fs' Error in TypeScript #

To solve the "Cannot find module fs or its corresponding type declarations" error, install the types for node by running the command npm i -D @types/node. You can then import fs with the following line of code import * as fs from 'fs'.

Make sure to install the typings for node by opening your terminal in your project's root directory and running the following command:

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npm i -D @types/node

This will install the typings for node as a dev dependency in your project.

Now you can import the fs module with the following line of code.

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import * as fs from 'fs';

console.log(fs);

If your error has not been resolved, open your tsconfig.json file and make sure the types array contains the string node.

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{
  "compilerOptions": {
    "types": [
      "node"
    ]
  },
}

If the error is not resolved, try to delete your node_modules and package-lock.json files, re-run npm install and restart your IDE.

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rm -rf node_modules package-lock.json

npm install

Make sure to restart your IDE if the error persists. VSCode glitches often and a reboot solves things sometimes.

Here is an example of how you would read a file in the same directory named another-file.ts with the fs module using TypeScript.

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import * as fs from 'fs';
import * as path from 'path';

console.log(
  fs.readFileSync(path.join(__dirname, './another-file.ts'), {
    encoding: 'utf-8',
  }),
);

And here is the output in my terminal showing the contents of another-file.ts.

Conclusion #

To solve the "Cannot find module fs or its corresponding type declarations" error, install the types for node by running the command npm i -D @types/node. You can then import fs with the following line of code import * as fs from 'fs'.