How to make website responsive and compatible for any device?

Question

Plz guide me

Answer 1

Use either bootstrap or w3.css

Answer 2

Take a look at the Bootstrap library: https://getbootstrap.com/

Answer 3

One thing is:
If you use onmousedown, onmousemove, onmouseup, onmousover, onmouseenter, or onmouseleave,
Make sure to also use ontouchstart, ontouchmove, and ontouchend.