单击时关闭选项卡

Question

我正在尝试在我的网站上做一个标签功能，我希望有那个标签响应。所以我做了这样的代码：

null

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();

/* 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;}

<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>

null

现在我有两样东西，

>

首先，我希望在单击标题（伦敦、巴黎、东京）时关闭选项卡，然后在单击该标题时从该标题中删除活动类。

其次，我希望有两个标签在行的响应，第三个标签在第二行，然后单击打开被点击的标签，然后向下推第三个标签。

任何提示都会有帮助，提前谢谢

Answer 1

给你发行号。1、你可以从“开放”改为“切换”，通过检查当前城市是否显示->然后你隐藏，否则你显示。

null

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

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

/* 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;}

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

<div id="London" class="tabcontent">
  <span onclick="toggleCity(event, 'London')" class="topright">&times</span>
  <h3>London</h3>
  <p>London is the capital city of England.</p>
</div>

<div id="Paris" class="tabcontent">
  <span onclick="toggleCity(event, 'Paris')" class="topright">&times</span>
  <h3>Paris</h3>
  <p>Paris is the capital of France.</p> 
</div>

<div id="Tokyo" class="tabcontent">
  <span onclick="toggleCity(event, 'Tokyo')" class="topright">&times</span>
  <h3>Tokyo</h3>
  <p>Tokyo is the capital of Japan.</p>
</div>