Question

How can I make a button to be invisible so that users can not see the button but can press it.

I have been trying to do this, but all the results I have found lead to hidden button.

Answer 1

Have you tried changing the background color, borders and color, to the same a the bakground color of the page?

body{
   color: white;
}

.button {
  color: white;
  background-color: transparent;
  border: 0px none transparent;
}

There are however many other ways to achieve this, depending on why you need to do it.

or the following:

.transparent {
    zoom: 1;
    filter: alpha(opacity=0);
    opacity: 0;
}

as noted on the CSS tricks link, for reference purposes here.