TypeScript / Node.js - install Node types (type declarations)

In this article, we would like to show you how to install and use Node types in TypeScript under Node.js.

Simple steps:

1. install TypeScript Node.js types, using:

npm install --save-dev @types/node

2. add packages using import keyword, e.g.:

import * as path from 'path';

path...

Practical example

In this example, after installing Node types with the above command, we import and use the path module using the import keyword.

import * as path from 'path';

// example paths
const absolutePath: string = 'C:/projects/app/index.js';
const relativePath: string = './index.js';

// check if path is absolute
const result1: boolean = path.isAbsolute(absolutePath);
const result2: boolean = path.isAbsolute(relativePath);

console.log(result1); // true
console.log(result2); // false

Output:

true
false

References

1. https://www.npmjs.com/package/@types/node
2. Path | Node.js v17.8.0 Documentation