【问题标题】:Query selector selecting an invisible element查询选择器选择不可见元素
【发布时间】:2021-08-29 05:45:18
【问题描述】:

目前有一个网站使用 JavaScript 使 CSS 元素可见和不可见。一个元素在 HTML 中,另一个在 CSS 中。这是汉堡菜单。

试图在容器外点击/点击关闭汉堡菜单。

选择当前打开状态的问题在于它不是 HTML 中的有效元素。不确定如何找到解决此问题的方法。任何帮助是极大的赞赏。谢谢

document.querySelector('#menu-icon').addEventListener('click', function() {
    document.querySelector('.nav-container').classList.toggle('nav-open')
})

document.querySelector('#close').addEventListener('click', function() {
    document.querySelector('.nav-container').classList.toggle('nav-open')
})

window.addEventListener('mouseup', function(event){
    var menu = document.querySelector('.nav-open');
    if (event.target != menu && event.target.parentNode != menu){
        menu.style.display = 'none';
    }
});
body {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100%;
    background-color:#000;
    font-family: 'EurostileBold', sans-serif;
}

#background{
    position:fixed;
    z-index:-1;
    top:0px;
    left:0px;
}
.header {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100px;
    z-index: 999;
}

.nav-container {
    position:absolute;
    top:0px;
    left:-340px;
    width: -340px;
    height:100%;
    background-color:#000;
    -webkit-transform: translateY(-340px,0);
    -ms-transform: translateY(-340px,0);
    transition: all 0.5s;
}

.nav-open {
    position:absolute;
    top:0px;
    left:0px;
    width:340px;
    height:100%;
    background-color:#000;
    -webkit-transform: translateY(340px,0);
    -ms-transform: translateY(340px,0);
    transition: all 0.5s;
}

.nav #close{
    position:absolute;
    top:35px;
    left:75px;
    width:20px;
    height:20px;
    background-size: 100% 100%;
    background-image:url(https://blacklist-rs.com/design/img/close.svg);
    background-repeat: no-repeat;
    cursor:pointer;
}

@media only screen and (max-width: 1280px) {
    .header #menu-icon{
        left: 35px;
        top: 46px;
        position: absolute;
        width: 30px;
        height: 30px;
        background-image:url(https://blacklist-rs.com/design/img/menu.svg);
        background-repeat: no-repeat;
        cursor:pointer;
    }   }
                <div class="header">
      <div id="menu-icon"></div>
                <div class="logo"></div>        
                <div class="nav">
                <div class="nav-container">
                    <div id="close"></div>
                    <div class="main-menu">
                    <ul class="menu">
        <li><a href="#home">Home</a> </li>
        <li><a href="#about">About</a> </li>
        <li><a href="#services">Services</a> </li>
        <li><a href="#contact">Contact</a> </li>
        </ul></div>
    </div>
  </div>

【问题讨论】:

    标签: javascript html css hamburger-menu


    【解决方案1】:

    我在 html 中看到一个错误。您忘记关闭一个 div 元素。最后在html中添加&lt;/div&gt;

    【讨论】:

      【解决方案2】:

      如果修复了您的代码,它基于this 答案。如果您在单击菜单项时不需要关闭菜单,则可以对其进行调整;)

      const navContainer = document.querySelector('.nav-container');
      const toggleMenu = (e, flag) => {
        e.stopPropagation();
        const isMenuShown = navContainer.classList
          .contains('nav-open');
        const shouldOpenMenu = flag === undefined 
          ? !isMenuShown
          : flag;
          
        navContainer.classList.toggle('nav-open', shouldOpenMenu);
      };
      
      window.addEventListener('click', (e) => toggleMenu(e, false));
      
      document.querySelector('#menu-icon')
        .addEventListener('click', (e) => toggleMenu(e))
      
      document.querySelector('#close')
        .addEventListener('click', (e) => toggleMenu(e));
      body {
          margin: 0px;
          padding: 0px;
          width: 100%;
          height: 100%;
          background-color:#000;
          font-family: 'EurostileBold', sans-serif;
      }
      
      #background{
          position:fixed;
          z-index:-1;
          top:0px;
          left:0px;
      }
      .header {
          position: absolute;
          top: 0px;
          left: 0px;
          width: 100%;
          height: 100px;
          z-index: 999;
      }
      
      .nav-container {
          position:absolute;
          top:0px;
          left:-340px;
          width: -340px;
          height:100%;
          background-color:#000;
          -webkit-transform: translateY(-340px,0);
          -ms-transform: translateY(-340px,0);
          transition: all 0.5s;
      }
      
      .nav-open {
          position:absolute;
          top:0px;
          left:0px;
          width:340px;
          height:100%;
          background-color:#000;
          -webkit-transform: translateY(340px,0);
          -ms-transform: translateY(340px,0);
          transition: all 0.5s;
      }
      
      .nav #close{
          position:absolute;
          top:35px;
          left:75px;
          width:20px;
          height:20px;
          background-size: 100% 100%;
          background-image:url(https://blacklist-rs.com/design/img/close.svg);
          background-repeat: no-repeat;
          cursor:pointer;
      }
      
      @media only screen and (max-width: 1280px) {
          .header #menu-icon{
              left: 35px;
              top: 46px;
              position: absolute;
              width: 30px;
              height: 30px;
              background-image:url(https://blacklist-rs.com/design/img/menu.svg);
              background-repeat: no-repeat;
              cursor:pointer;
          }   }
      <div class="header">
        <div id="menu-icon"></div>
        <div class="logo"></div>        
        <div class="nav">
        <div class="nav-container">
          <div id="close"></div>
          <div class="main-menu">
            <ul class="menu">
              <li><a href="#home">Home</a> </li>
              <li><a href="#about">About</a> </li>
              <li><a href="#services">Services</a> </li>
              <li><a href="#contact">Contact</a> </li>
            </ul>
          </div>
        </div>
      </div>

      【讨论】:

        【解决方案3】:

        设法只使用JQuery

        $('#bg-close').on('click', function() {
            
            let nav =  $('#nav-close');
            
            if(nav.attr('class') == 'nav-container nav-open'){
               nav.attr('class','nav-container');
            }
            
        });
        

        【讨论】:

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