how to remove button border in html 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: how to remove border on button click

.btnName{
	outline: none;
}