如何打开带有URL的标签？

Question

我在这里有这些标签：

 function openCity(evt, cityName) { // Declare all variables var i, tabcontent, tablinks; // Get all elements with class="tabcontent" and hide them tabcontent = document.getElementsByClassName("tabcontent"); for (i = 0; i < tabcontent.length; i++) { tabcontent[i].style.display = "none"; } // Get all elements with class="tablinks" and remove the class "active" tablinks = document.getElementsByClassName("tablinks"); for (i = 0; i < tablinks.length; i++) { tablinks[i].className = tablinks[i].className.replace(" active", ""); } // Show the current tab, and add an "active" class to the button that opened the tab document.getElementById(cityName).style.display = "block"; evt.currentTarget.className += " active"; } 

 /* Style the tab */ .tab { overflow: hidden; border: 1px solid #ccc; background-color: #f1f1f1; } /* Style the buttons that are used to open the tab content */ .tab button { background-color: inherit; float: left; border: none; outline: none; cursor: pointer; padding: 14px 16px; transition: 0.3s; } /* 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; } 

 <!-- Tab links --> <div class="tab"> <button class="tablinks" onclick="openCity(event, 'London')">London</button> <button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button> <button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button> </div> <!-- Tab content --> <div id="London" class="tabcontent"> <h3>London</h3> <p>London is the capital city of England.</p> </div> <div id="Paris" class="tabcontent"> <h3>Paris</h3> <p>Paris is the capital of France.</p> </div> <div id="Tokyo" class="tabcontent"> <h3>Tokyo</h3> <p>Tokyo is the capital of Japan.</p> </div> 

我现在如何通过URL引用，例如使用＃指向特定标签？ 这样，当我单击选项卡时，URL更改为选项卡，并且当我重新加载页面或共享特定选项卡被打开的URL时？

Answer 1

您可以像这样从URL提取锚：

function getAnchor() {
    return (document.URL.split('#').length > 1) ? document.URL.split('#')[1] : null;
}

然后，在页面加载时，您可以将活动标签设置为相应的锚点。
location.hash.substr(1)将返回与上面相同的结果。