css @media print has no effect in external stylesheet

Question

Please help me see where the problem is. I made a form with a button. I want to control the button not to print. I defined an external css file for the form. Most styles can be implemented. , only the part where the button does not print is invalid, this part is written like this:

@media print

{

.noprint {display:none;}

}

Answer 1

What browser are you using? Some browsers do not support external css for print.

The firefox I use can