.btn:focus,.btn:active:focus,
.btn.active:focus,.btn.focus,
.btn:active.focus,.btn.active.focus {
outline: none;
border-color: transparent;
box-shadow:none;
}
bootstrap的button按钮点击之后会有蓝色边框怎么解决?
原文：https://www.cnblogs.com/sllzhj/p/8759200.html