Pitasi

// Copied by https://gist.github.com/dotcypress/8fd12d6e886cd74bba8f1aa8dbd346aa,
// thanks for improving code style

const { createHash, createHmac } = require('crypto');
const TOKEN = "ABC:12345...";

// I prefer get the secret's hash once but check the gist linked
// on line 1 if you prefer passing the bot token as a param
const secret = createHash('sha256')
  .update(TOKEN)

martinburger

<h2>reCAPTCHA without form / AJAX only</h2>

<div class="panel panel-warning" id="panel-recaptcha">
  <div class="panel-heading">
    <h3 class="panel-title">Captcha</h3>
  </div>
  <div class="panel-body">
    <div id="recaptcha-service" class="g-recaptcha"
         data-callback="recaptchaCallback"
         data-sitekey=""></div>