在按钮之间添加管道分隔符？

Question

我想在选项卡中的每个按钮之间添加一个“空格-管道-空格”分隔符。显示活动选项卡的背景颜色和悬停时显示的背景颜色不应包含管道分隔符。它应该只包含每个选项卡中的文本部分。

例如，伦敦 |巴黎 |东京

function openCity(evt, cityName) {
  var i, tabcontent, tablinks;
  tabcontent = document.getElementsByClassName("tabcontent");
  for (i = 0; i < tabcontent.length; i++) {
    tabcontent[i].style.display = "none";
  }
  tablinks = document.getElementsByClassName("tablinks");
  for (i = 0; i < tablinks.length; i++) {
    tablinks[i].className = tablinks[i].className.replace(" active", "");
  }
  document.getElementById(cityName).style.display = "block";
  evt.currentTarget.className += " active";
}

// Get the element with id="defaultOpen" and click on it
document.getElementById("defaultOpen").click();

body {
  font-family: Arial;
}


/* Style the tab */

.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}


/* Style the buttons inside the tab */

.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 17px;
}


/* Change background color of buttons on hover */

.tab button:hover {
  background-color: #ddd;
}


/* Create an active/current tablink class */

.tab button.active {
  background-color: #ccc;
}


/* Style the tab content */

.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px solid #ccc;
  border-top: none;
}


/* Style the close button */

.topright {
  float: right;
  cursor: pointer;
  font-size: 28px;
}

.topright:hover {
  color: red;
}

<h2>Tabs</h2>
<p>Click on the x button in the top right corner to close the current tab:</p>

<div class="tab">
  <button class="tablinks" onclick="openCity(event, 'London')" id="defaultOpen">London</button>
  <button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button>
  <button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button>
</div>

<div id="London" class="tabcontent">
  <span onclick="this.parentElement.style.display='none'" class="topright">&times</span>
  <h3>London</h3>
  <p>London is the capital city of England.</p>
</div>

<div id="Paris" class="tabcontent">
  <span onclick="this.parentElement.style.display='none'" class="topright">&times</span>
  <h3>Paris</h3>
  <p>Paris is the capital of France.</p>
</div>

<div id="Tokyo" class="tabcontent">
  <span onclick="this.parentElement.style.display='none'" class="topright">&times</span>
  <h3>Tokyo</h3>
  <p>Tokyo is the capital of Japan.</p>
</div>

有人可以帮忙吗？

Answer 1

您可以像这样使用:after 选择器添加分隔符：

.tab button:not(:last-child):after {
    content: "|";
    display: inline-block;
    position: absolute;
    right: -1px;
}

function openCity(evt, cityName) {
  var i, tabcontent, tablinks;
  tabcontent = document.getElementsByClassName("tabcontent");
  for (i = 0; i < tabcontent.length; i++) {
    tabcontent[i].style.display = "none";
  }
  tablinks = document.getElementsByClassName("tablinks");
  for (i = 0; i < tablinks.length; i++) {
    tablinks[i].className = tablinks[i].className.replace(" active", "");
  }
  document.getElementById(cityName).style.display = "block";
  evt.currentTarget.className += " active";
}

// Get the element with id="defaultOpen" and click on it
document.getElementById("defaultOpen").click();

body {font-family: Arial;}

/* Style the tab */
.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}

/* Style the buttons inside the tab */
.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 17px;
  position: relative;
}

.tab button:not(:last-child):after {
    content: "|";
    display: inline-block;
    position: absolute;
    right: -1px;
}

/* Change background color of buttons on hover */
.tab button:hover {
  background-color: #ddd;
}
.tab button.active:after,
.tab button:hover:after {
  opacity: 0;
}

/* Create an active/current tablink class */
.tab button.active {
  background-color: #ccc;
}

/* Style the tab content */
.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px solid #ccc;
  border-top: none;
}

/* Style the close button */
.topright {
  float: right;
  cursor: pointer;
  font-size: 28px;
}

.topright:hover {color: red;}

<h2>Tabs</h2>
<p>Click on the x button in the top right corner to close the current tab:</p>

<div class="tab">
  <button class="tablinks" onclick="openCity(event, 'London')" id="defaultOpen">London</button>
  <button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button>
  <button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button>
</div>

<div id="London" class="tabcontent">
  <span onclick="this.parentElement.style.display='none'" class="topright">&times</span>
  <h3>London</h3>
  <p>London is the capital city of England.</p>
</div>

<div id="Paris" class="tabcontent">
  <span onclick="this.parentElement.style.display='none'" class="topright">&times</span>
  <h3>Paris</h3>
  <p>Paris is the capital of France.</p> 
</div>

<div id="Tokyo" class="tabcontent">
  <span onclick="this.parentElement.style.display='none'" class="topright">&times</span>
  <h3>Tokyo</h3>
  <p>Tokyo is the capital of Japan.</p>
</div>