css get rid of button outline on click
button:hover, button:focus { outline: none; }
how to remove button decoration
button { border: none; } button:focus { border: none; outline: none; } button:focus{ outline:none !important; } (add !important if it is used in Bootstrap)
remove button default border css
button:focus { outline: none; }
Source: stackoverflow.com
removing the unwanted border button css
button, button:active, button:focus { outline: none; }
Source: discuss.codecademy.com
how to remove border on button click
.btnName{ outline: none; }
css button remove border
button{ box-shadow:none }