Answers for "bootstrap remove border on click"

remove button highlight on click

.btn:focus {
  outline: none;
  box-shadow: none;
}

bootstrap input remove border on focus

textarea:hover, 
input:hover, 
textarea:active, 
input:active, 
textarea:focus, 
input:focus,
button:focus,
button:active,
button:hover,
label:focus,
.btn:active,
.btn.active
{
    outline:0px !important;
    -webkit-appearance:none;
    box-shadow: none !important;
}

disable border toggle bootstrap

.navbar-toggler:focus,
.navbar-toggler:active,
.navbar-toggler-icon:focus {
    outline: none;
    box-shadow: none;
}