What's the usage of Js to our website

Question

Javascript

Answer 1

Bro, Common uses for JavaScript include confirmation boxes, calls-to-action, and adding new identities to existing information.

Answer 2

You can make dynamic page with js.

If you want any effect on any event you can use js.
If you want api/json/ajax you can do it with js also.

Answer 3

Javascript is use to make websites more interactive and user-friendly.
You can make games using javascript, you can do many more

Answer 4

We do use Javascript to increase functionalities in a website since we have no functions in HTML or CSS.Example if we have a button for submitting a form we can have a function which is invoked and takes the info wherever you want take it to(to a database or just to upload the content).
Another application is form validation.
Hope this helps.Thank you.