Teach Me to Code

 What is a Runtime Environment? A runtime environment is where your program will be executed. It determines what global objects your program can access and it can also impact how it runs. How does the JavaScript Environment Work? The JavaScript runtime environment provides access to built-in libraries and objects that are available to program so that it can interact with the outside world and make the code work. Different browsers have different JavaScript Runtime Environments. In the context of a browser, JS runtime  is comprised of the following elements: The JavaScript Engine Web APIs The Call Back Queue The Event Loop The JavaScript Engine All the browsers have a JavaScript Engine. But all are not necessarily the same engine. Also, all the engines follow the same standard although their implementation is different. For example, Google Chrome has the V8 engine and Mozilla Firefox has Spyder Monkey as a JavaScript engine. The JavaScript Engine parses the code for us. It has two major