html – 从活动按钮中删除突出显示

我有几个按钮样式为选项菜单的选项卡.一切看起来像我想要的,它的工作正常.我唯一的问题是活动按钮上的蓝色突出显示.我该如何删除它？

由于我不明白的原因,我的代码片段不能重现问题.

function ShowCurrent()
{
	document.getElementById('btnCurrent').className = "menu";
	document.getElementById('btnFuture').className = "menu off";
}

function ShowFuture()
{
	document.getElementById('btnFuture').className = "menu";
	document.getElementById('btnCurrent').className = "menu off";
}

.menu
{
	border: 2px solid grey;
	border-bottom: none;
	margin-bottom: -2px;
	margin-right: 5px;
	padding: 3px 2px;
	position: relative;
	z-index: 5;
}

.off
{
	border-bottom: 2px solid grey;
	padding: 2px;
}

.placeholder
{
    border: 2px solid grey;
}

<div>
	<button id="btnCurrent" class="menu" onClick="ShowCurrent();">Current</button>
	<button id="btnFuture" class="menu off" onClick="ShowFuture();">Future</button>
</div>

<div class="placeholder">Just hanging out,taking up space</div>

解决方法

只需添加大纲：0

function ShowCurrent() {
  document.getElementById('btnCurrent').className = "menu";
  document.getElementById('btnFuture').className = "menu off";
}

function ShowFuture() {
  document.getElementById('btnFuture').className = "menu";
  document.getElementById('btnCurrent').className = "menu off";
}

button.menu {
  border: 2px solid grey;
  border-bottom: none;
  margin-bottom: -2px;
  margin-right: 5px;
  padding: 3px 2px;
  position: relative;
  z-index: 5;
  outline: 0;
}
button.off {
  border-bottom: 2px solid grey;
  padding: 2px;
}
.placeholder {
  border: 2px solid grey;
}

<div>
  <button id="btnCurrent" class="menu" onClick="ShowCurrent();">Current</button>
  <button id="btnFuture" class="menu off" onClick="ShowFuture();">Future</button>
</div>

<div class="placeholder">Just hanging out,taking up space</div>