How to remove blue border from nav element?

Question

css

Good afternoon.
Can you please tell me how can I remove this blue border around the nav element when clicked?
I'm using Bootstrap's Navbar menu.
On the desktop, everything is fine, it is not even displayed. But when I uploaded my project to github and went to see the page from my phone, I noticed such a blue frame when I clicked it.


I can't figure out how to remove it. ..Please help!

Answer 1

.element:focus {
    border: none;
    outline: none;
}