What is a JS engine?
In general, JS engines are also known as ECMAScript engines. As many web browsers there are, so are the JS engines.
- Google chrome has V8 engine.
- Mozilla Firefox has SpiderMonkey
- Microsoft Edge and Internet Explorer has Chakra
- Opera has Carakan(pronounced Tsharakan)
Each JS engine works in a more or less similar fashion. But, the most popular being V8 engine which used in Chrome and Node.js