JWT Library

A TypeScript library for encoding, decoding and validating JSON Web Tokens (JWTs) using the HS256 algorithm. This library includes functionality for encoding JWTs with a specified payload and secret, decoding JWTs to extract their contents, and validating JWTs.

Features

• Encode JWTs with HS256 algorithm
• Decode JWTs and extract payload and header
• Validate JWTs
• Support for customizable payload expiration
• Supports both ES Modules and CommonJS modules

Installation

You can install this library via npm:

npm i @falgunpal/jwt-helper-ts

Usage

Encoding a JWT

To create a JWT, use the encode_jwt function:

import { encode_jwt } from "@falgunpaljwt-helper-ts";
const secret = 'your-secret';
const id = 1;
const payload = { name: 'John Doe' };
const ttl = 3600; // Optional, in seconds

const token = encode_jwt(secret, id, payload, ttl);
console.log('Generated Token:', token);

Decoding a JWT

To decode a JWT, use the decode_jwt function:

import { decode_jwt } from '@falgunpaljwt-helper-ts';

const secret = 'your-secret';
const token = 'your-jwt-token';

const decoded = decode_jwt(secret, token);
console.log('Decoded JWT:', decoded);

Validating a JWT

To validate a JWT, use the validate_jwt function:

import { validate_jwt } from  '@falgunpaljwt-helper-ts';

const secret = 'your-secret';
const token = 'your-jwt-token';

const isValid = validate_jwt(secret, token);
console.log('Is Token Valid?', isValid);

Module System Support

This package supports both ECMAScript Modules (ESM) and CommonJS (CJS) module configurations. You can import and use the functions based on your module system preference.

ESM Usage

If you're using ESM:

import { encode_jwt, decode_jwt, validate_jwt } from 'jwt-helper';

CJS Usage

If you're using CommonJS:

const { encode_jwt, decode_jwt, validate_jwt } = require('jwt-helper');

Testing

The library includes tests for its core functionality. To run the tests, use:

npm test