如何将“活动”类添加到 WordPress 中的当前菜单项

Posted 2023-02-24

【中文标题】如何将“活动”类添加到 WordPress 中的当前菜单项

【英文标题】：How to add “active” class to current menu item in WordPress

【发布时间】：2018-06-30 02:33:35

【问题描述】：

我有一个基于 WordPress 的网站，我的主题通过向其中添加“current-menu-item”类来突出显示当前菜单项。

问题是我有一个包含 3 个子菜单项的菜单项，它们都指向具有不同容器 ID 的同一页面（它们的 href 包含容器 ID），因此它们都被突出显示。

如何仅突出显示 href 指向当前查看的容器的菜单项？

<ul>
<li><ahref="URL/who-we-are/"><span>WhoWeAre</span></a>
<ul>
    <li id="first"><ahref="URL/who-we-are/#wherewework"><span>WhereWeWork</span></a></li>
    <li id="second"><ahref="URL/who-we-are/#whatwebelieve"><span>WhatWeBelieve</span></a></li>
    <li id="third"><ahref="URL/who-we-are/#ourpartners"><span>OurPartners</span></a></li>
</ul>
</li>
<li><ahref="#"><span>GetInvolved</span></a>
<ul>
    <li><ahref="URL/vacancies/"><span>Vacancies</span></a></li>
    <li><ahref="URL/Become-Active/"><span>BecomeActive</span></a></li>
</ul>
</li>
<li><ahref="URL/contactus/"><span>ContactUs</span></a></li>
</ul>

我已经通过在标签之后插入以下内容来尝试这个answer：

function onVisibilityChange(el, callback) 
    var old_visible;
    return function () 
        var visible = isElementInViewport(el);
        if (visible != old_visible) 
            old_visible = visible;
            if (typeof callback == 'function') 
                callback();
            
        
    


var handler = onVisibilityChange(#whatwebelieve, function() 
    $( "#second" ).removeClass( "current-menu-item" )
);


//jQuery
$(window).on('DOMContentLoaded load resize scroll', handler);

【参考方案1】：

这是一个简单的卷轴间谍。

// Cache selectors
var lastId,
  topMenu = $("#top-menu"),
  topMenuHeight = topMenu.outerHeight() + 15,
  // All list items
  menuItems = topMenu.find("a"),
  // Anchors corresponding to menu items
  scrollItems = menuItems.map(function() 
    var item = $($(this).attr("href"));
    if (item.length) 
      return item;
    
  );

// Bind click handler to menu items
// so we can get a fancy scroll animation
menuItems.click(function(e) 
  var href = $(this).attr("href"),
    offsetTop = href === "#" ? 0 : $(href).offset().top - topMenuHeight + 1;
  $('html, body').stop().animate(
    scrollTop: offsetTop
  , 300);
  e.preventDefault();
);

// Bind to scroll
$(window).scroll(function() 
  // Get container scroll position
  var fromTop = $(this).scrollTop() + topMenuHeight;

  // Get id of current scroll item
  var cur = scrollItems.map(function() 
    if ($(this).offset().top < fromTop)
      return this;
  );
  // Get the id of the current element
  cur = cur[cur.length - 1];
  var id = cur && cur.length ? cur[0].id : "";

  if (lastId !== id) 
    lastId = id;
    // Set/remove active class
    menuItems
      .parent().removeClass("active")
      .end().filter("[href='#" + id + "']").parent().addClass("active");
  
);

body 
  height: 6000px;
  font-family: Helvetica, Arial;


#top-menu 
  position: fixed;
  z-index: 1;
  background: white;
  left: 0;
  right: 0;
  top: 0;


#top-menu li 
  float: left;


#top-menu a 
  display: block;
  padding: 5px 25px 7px 25px;
  width: 4em;
  text-align: center;
  -webkit-transition: .5s all ease-out;
  -moz-transition: .5s all ease-out;
  transition: .5s all ease-out;
  border-top: 3px solid white;
  color: #aaa;
  text-decoration: none;


#top-menu a:hover 
  color: #000;


#top-menu li.active a 
  border-top: 3px solid #333;
  color: #333;


#foo 
  position: absolute;
  top: 400px;


#bar 
  position: absolute;
  top: 800px;


#baz 
  position: absolute;
  top: 1200px;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="top-menu">
  <li class="active">
    <a href="#">Top</a>
  </li>
  <li>
    <a href="#foo">Foo</a>
  </li>
  <li>
    <a href="#bar">Bar</a>
  </li>
  <li>
    <a href="#baz">Baz</a>
  </li>
</ul>

<a id="foo">Foo</a>


<a id="bar">Bar</a>


<a id="baz">Baz</a>