remove button decoration css code example

Example 1: 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)

Example 2: remove button default border css

button:focus { outline: none; }

Example 3: button style none

button, input[type="submit"], input[type="reset"] {
	background: none;
	color: inherit;
	border: none;
	padding: 0;
	font: inherit;
	cursor: pointer;
	outline: inherit;
}