What is JS and what is it for?
JS is the programming language you should use to add interactive features to your website (for example, games, events that occur when buttons are pressed or data is entered in forms, dynamic styling effects, animation, etc).
Who uses JS?
All modern browsers interpret JS code embedded in web pages. To interact with a web page, the JS language is provided with an implementation of the Document Object Model (DOM). JS is the only programming language that browsers understand natively.
What is the difference between Java and JS?
Java is an OOP programming language while JS is an OOP scripting language. Java creates applications that run in a virtual machine or browser, while JS code only runs in a browser.
So what is their common point? Both languages come from the C programming language. Therefore, Java and JS have the same structure. However, they are very different in their operation and use.
How fast is JS?
JS is FAST and EXTENDABLE
Especially when comparing to the closest competitors like Python, with the advancements in V8, JS is more performance and memory efficient. JS (Node) can be extended (with supersets like TypeScripts).