How to find module "fs" in MS Code with TypeScript?

javascript typescript tsc
Brick picture Brick · May 16, 2016 · Viewed 67.9k times · Source

I'm running on a MacBook Air. I installed MS Code as an IDE and also have TypeScript installed.

I have a simple file with just this line:

import fs = require('fs');

I'm getting a red squiggly under the 'fs' inside the parenthesis and the error message is [ts] Cannot find module 'fs'. The file has a .ts extension. I'm new to JavaScript and to TypeScript, but I was under the impression that fs was a core module, so how could it not be found? How do I fix the problem?

Other things that I tried already:

  • Putting a simple function body in the file and then compiling on the command line with tsc. I get an essentially equivalent error there: error TS2307: Cannot find module 'fs'.
  • On the command line sudo npm install fs -g. This reports apparent success, but doesn't fix the problem.

I poked around SE and the web, but the answers that seemed close all appear to assume that 'fs' is available.

Answer

David Sherret picture David Sherret · May 16, 2016

You need to include the definition file for node.

TypeScript 2.0+

Install using npm:

npm install --save-dev @types/node

TypeScript < 2.0

If you use typings then you can run this command:

typings install dt~node --global --save

Or if you are using typings < 1.0 run:

typings install node --ambient --save

Or if all else fails, manually download the file here and include it in your project.

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