Visual Studio Code、NodeJS 和 require

Question

I installed Visual Studio Code and would like to code NodeJS using TypeScript. So I created very basic application and I get error that says:

Cannot find name 'require'. Do you need to install type definitions for node? Try `npm i --save-dev @types/node`.ts(2580)

Executing mentioned npm command does not resolve the issue. I've lost the wall of links I've followed, read and either didn't apply to me, didn't fix the issue, were outdated etc.:

This one came closest:
https://www.section.io/engineering-education/how-to-use-typescript-with-nodejs/

I ran these commands:
npm i --save-dev @types/node
npm install -g typescript
npm install -D typescript

Just to test I replaced configuration file tsconfig.json with:

{
  "compilerOptions": {                        
    "target": "es6",                               
    "module": "commonjs",                           
    "outDir": "./dist",                             
    "rootDir": "./src",                             
    "strict": true,
    "moduleResolution": "node",
    "esModuleInterop": true,                       
  },
  "exclude":[
    "./node_modules"
  ]
}

I moved my .ts file to src folder of the root folder of the project, and created dest folder. I restarted the application, nothing. I looked for extensions which might've helped, nothing.

I understand that I can't just "require" in TypeScript because it wants to check if function actually exists, unlike JavaScript. But how do I actually compile the TypeScript code to JavaScript and then run it? The lines that cause problem are the very three at the topic of the file.

const http = require('http');
const crypto = require('crypto');
const colors = require('colors');

Edit:
declare function require(name : string); Fixed the issue. But require('crypto') throws:
lib.dom.d.ts(18699, 13): 'crypto' was also declared here.

Answer 1

Honestly, I don't know precisely what is causing the issue, but I'd guess some configuration is broken.

Sometimes an easy way out is to simply start fresh: try creating a new project and import only the stuff you need.

• If it works, you should continue developing on the "new project". This sometimes is not an option, but it's probably the easiest way out with these types of problem.

• If it doesn't work, or starting a new project is not an option, you can try looking up online and eventually post an answer here on Stack Overflow if the results don't satisfy you, but you can also try starting "even more fresh" by reinstalling node/typescipt & Co.