Example Json Web Token generator in NodeJS

index.js

const crypto = require('crypto')
const base64url = require('base64-url')
const encode = input => base64url.encode(input)

const header = JSON.stringify({
    alg: "HS256",
    "typ": "JWT"
})

const payload = JSON.stringify({
    name: "Joe Bloggs",
    eml: "test@test.com",
    adm: true,
    cid: 10
})

const secret = "00}R`nP1E%L$b0."

const hmac = crypto.createHmac('sha256', secret)
hmac.update(`${encode(header)}.${encode(payload)}`)

console.log(`${encode(header)}.${encode(payload)}.${base64url.encode(hmac.digest())}`)

package.json

{
  "name": "jwt-test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "base64-url": "^1.3.3"
  }
}