How to make a modal window full screen?

Question

css

Good day everyone.
Can you tell me how to open a modal window in full screen on click? Maybe there is something ready? Which can be inserted and adjusted for yourself?
Thank you.

Answer 1

Full-screen modal window

Answer 2

.modal {
position: absolute;
left: 0; right: 0; top: 0; bottom: 0;
background color: white
z-index: 999;
}
A div with this class should be under the body and the body should have position: relative
Javascript add or remove a node. Style the content inside to your liking.