what is js?

Question

where it use?

Answer 1

JS is Javascript and it is a web language... It is used to make websites interactive.

Answer 2

js is the file extension for JavaScript.

After writing a JavaScript Script or program, the proper way to save it is by adding the js extention to it so that the web should know is javascritpt

example

main.js (adding .js at the end of "main" tells the browser "Dude this is JavaScript and not html")

examples of other popular extensions

.html (for html files)
.css(for css files)
.py(for python script)
.mp3(for audio files)
.apk(for android apps)
.mp4(for video files)
.txt(for text files)
.exe(for Windows softwares)

etc
I hope you now have a more understanding .js

Answer 3

not only for this :) he can do evrythink

Answer 4

behaviour of an element

Answer 5

js JavaScript
scripting language
to give somek8nd of behavior to ur element