: to understand profoundly and intuitively

The Open Learning Platform

Grok is a platform for learning programming languages and technologies. The explanations given are clear and concise. We believe that showing is better than telling, so we made Grok interactive. You can code and see your output without having to leave the browser. You do not have to sign up for this service. We adhere to the following principles:

  1. Forever free
  2. No advertisements
  3. Open source


Learn the fundamentals of the language that powers the world wide wibe. JavaScript is primarily used as a client side scripting language, but is growing in popularity server side for its use in Node.JS


TypeScript adds much needed type capabilities to JavaScript. Learn to write safe and reliable code with this language backed by Microsoft.