javascript - 再次单击时关闭 javascript 选项卡

Question

我有带标签的部分，需要在再次单击标签时关闭这些标签。

我认为这需要一个切换方法，但我不确定该怎么做。

这是 HTML:

<div class="tab">
 <button class="tablinks" id="tab1" onclick="openSubSvc(event, 'srv1-sub1')" >Sub-Service 1</button>
 <button class="tablinks" id="tab2" onclick="openSubSvc(event, 'srv1-sub2')">Sub-Service 2</button>
 <button class="tablinks" id="tab3" onclick="openSubSvc(event, 'srv1-sub3')">Sub-Service 3</button>
</div>

<div id="srv1-sub1" class="tab-content">
 <p>Text</p>
</div>

<div id="srv1-sub2" class="tab-content">
 <p>Text</p>
</div>

<div id="srv1-sub3" class="tab-content">
 <p>Text</p>
</div>

这是标签功能:

function openSubSvc(evt, subSvcName) {
    var i, tabcontent, tablinks;
    tabcontent = document.getElementsByClassName("tab-content");
    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(subSvcName).style.display = "block";
    evt.currentTarget.className += " active";
}

这是 CSS:

.tab {
 float: left;
 padding:0!important;
 margin:0!important;
}

.tab button {
 padding: 15px;
 width: 100%;
 text-align: left;
 transition: 0.3s;
}

.tab button:last-child {margin-bottom:0;}
.tab button:hover {background-color: #ddd;}
.tab button.active {background-color: #ccc;}

.tab-content {
 width:70.8%!important;
 margin-left:2%!important;
 margin-bottom:0;
 padding:0!important;
}

因此，如果单击第一个选项卡并打开内容，我需要在再次单击时关闭内容。

Answer 1

您必须检查点击按钮上的 active 类。我只是用 if condition 更新了你的代码。谢谢

function openSubSvc(evt, subSvcName) {
    var activeClass = evt.target.classList.contains("active")
    if(!activeClass){
      var i, tabcontent, tablinks;
      tabcontent = document.getElementsByClassName("tab-content");
      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(subSvcName).style.display = "block";
      evt.currentTarget.className += " active";
    } else {
      document.getElementById(subSvcName).style.display = "none";
      evt.target.classList.remove("active");
    }
}

<div class="tab w-30 ml-100 mp-100">
 <button class="tablinks" id="tab1" onclick="openSubSvc(event, 'srv1-sub1')" >Sub-Service 1</button>
 <button class="tablinks" id="tab2" onclick="openSubSvc(event, 'srv1-sub2')">Sub-Service 2</button>
 <button class="tablinks" id="tab3" onclick="openSubSvc(event, 'srv1-sub3')">Sub-Service 3</button>
</div>

<div id="srv1-sub1" class="tab-content">
 <p>Text 1</p>
</div>

<div id="srv1-sub2" class="tab-content">
 <p>Text 2</p>
</div>

<div id="srv1-sub3" class="tab-content">
 <p>Text 3</p>
</div>