NodeJS not resolving index.ts files automatically

Question

When I use require in my NodeJS + Typescript app I must add index.ts file to the url otherwise I get en error Cannot find module './api', e.g.

const api = require('./api/index.ts') - works

const api = require('./api') - not working

My package.json:

  "dependencies": {
    "@types/express": "^4.16.1",
    "cors": "^2.8.5",
    "express": "^4.16.4",
    "mongoose": "^5.5.5",
    "morgan": "^1.9.1",
    "ts-node": "^8.1.0",
    "ts-node-dev": "^1.0.0-pre.32",
    "tslint": "^5.16.0",
    "typescript": "^3.4.5"
  }

Madara's Ghost · Accepted Answer · 2019-05-02 08:19:39Z

1

This could be the result of a few things. Your package.json has little bearing on how TypeScript resolves relative imports/requires.

Check your target, module and moduleResolution compiler options in your tsconfig.json file. More specifically, module should be set to "commonjs" (for Node.js applications) and moduleResolution should be set to "node"

Comments

Paleo · Accepted Answer · 2019-05-02 08:23:55Z

1

TypeScript source files must be compiled to JavaScript files, before to be executed by Node.js.

For example with: npx tsc.

answered May 2, 2019 at 8:23

Paleo

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Janith · Accepted Answer · 2019-05-02 09:04:05Z

1

require is not the default importing format when you are using typescript so might not resolve sometimes, try using import * as api from './api' instead

answered May 2, 2019 at 9:04

Janith

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Dandy · Accepted Answer · 2019-05-04 08:26:43Z

0

indeed there were 2 issues:

using ES5 syntax
not compiling TS files

So instead of using require I've changed everything to import and also needed to add ts-node to my script, like : nodemon --watch '*.ts' --exec 'ts-node' server.ts

answered May 4, 2019 at 8:26

Dandy

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