Question

作为我正在开发的网站的一部分，我需要实现一个侧面导航栏（位于右侧），该侧面导航栏在切换以显示导航栏内容时会将页面内容推向左侧。

问题在于，动画中有一个小故障。再次单击切换开关以关闭导航栏时，会将网站的整个内容推向右侧。内容需要返回到单击切换开关之前的位置。

这是我的代码：

HTML

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  </head>
  <body>
    <div class="navbar sticky-top ">
    <img src="img/Vamos-Black.png" alt="" width="120px" class="d-sm-none d-md-block d-none d-sm-block">
    <a href="javascript:void(0);" class="menu_icon"></a>
    <div id="menu">
         <ul>
            <img src="img/vamoslogo2.png" alt="" width="120px" class="d-block d-sm-none" id="navbar-logo">
           <li><a href="#">home</a></li>
           <li><a href="#">work</a></li>
           <li><a href="#">contact us</a></li>
           <li><a href="#">about</a></li>
           <li><a href="#">blog</a></li>
         </ul>
       </div>
      <br>

      <div class="container">

      <h1>This is some text</h1><br>
      <h2>This is some more text</h2>

      </div>
</div>

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

CSS

#menu {
  padding-top: 80px;
  position: fixed;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: #000;
}


#menu ul {
  margin: 0;
  padding: 0;
}

#menu ul li {
  margin: 0 10px;
  list-style: none;
  display: block;
  line-height: 30px;
}

#menu ul li a {
  padding: 60px 0px 0px 200px;
  text-align: right;
  color: #FFF;
  font-size: 14px;
  font-weight: bold;
  display: block;
  text-decoration: none;
  -webkit-transition-property: all;
  -webkit-transition-duration: 0.1s;s
  -webkit-transition-timing-function: ease-out;
  -moz-transition-property: all;
  -moz-transition-duration: 0.1s;
  -moz-transition-timing-function: ease-out;
  -ms-transition-property: all;
  -ms-transition-duration: 0.1s;
  -ms-transition-timing-function: ease-out;
  -o-transition-property: all;
  -o-transition-duration: 0.1s;
  -o-transition-timing-function: ease-out;
  transition-property: all;
  transition-duration: 0.1s;
  transition-timing-function: ease-out;
}

#menu ul li:hover {
  border-bottom: 1px solid #000;
}

#menu ul li a:hover {
  color: #000;
}

.menu_icon {

  z-index: 3;
  margin-right: 80px!important;
  background: 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UVORK5CYII=') no-repeat;
  margin-top: -10px;
  width: 30px;
  height: 18px;
  display: flex;
  margin-left:auto;

}

JS

滚动时，这会将白色背景添加到导航栏。

$(function() {
    var header = $(".navbar");

    $(window).scroll(function() {    
        var scroll = $(window).scrollTop();
        if (scroll >= 50) {
            header.addClass("scrolled");
        } else {
            header.removeClass("scrolled");
        }
    });

});

这是关于将内容推到左侧的动画

$('#menu').css("right","-300px");
    $('.menu_icon').on('click',function(){
        if($('.menu_icon').hasClass('open')){
            $(this).removeClass('open');
            $(this).animate({
                "right":"20px",
                "background-position":"0px"
            });
            $('#menu').animate({"right":"-300px"});
            $('body').css("position","absolute");
            $('body').animate({
                "right":"0px",
                "z-index":"999"
            });
        }
        else{
            $(this).addClass('open');
            $(this).animate({
                "right":"310px",
                "background-position":"-40px"
            });
            $('#menu').animate({"right":"0px"});
            $('body').css("position","absolute");
            $('body').animate({
                "right":"300px",
                "z-index":"999"
            });

        }
    });

我尝试过的方法：

我已经更改了JS代码中的结束动画，但是我认为这不是实现此方法的正确方法。我将正确的间距更改为300px而不是0px

 $('#menu').animate({"right":"-300px"});
      $('body').css("position","absolute");
      $('body').animate({
          "right":"300px",
          "z-index":"999"
      });

这仍然不能解决导航栏对齐问题。

有什么想法可以解决此问题？我也将代码发布在了代码笔https://codepen.io/anon/pen/qGwpaG上。

Answer 1

除非应进行不允许的计算，否则应使用CSS为所有动画设置动画。在CPU上更容易实现，并且易于实现。

body {
  transition: margin 0.5s ease;
}

#menu {
  padding-top: 80px;
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100%;
  background: #000;
  transition: right 0.5s ease;
}

#menu.open {
  right: 0;
}

$(function() {
  var header = $(".navbar");

  $(window).scroll(function() {
    var scroll = $(window).scrollTop();
    if (scroll >= 50) {
      header.addClass("scrolled");
    } else {
      header.removeClass("scrolled");
    }
  });
});

$('#menu').css("right","-300px");
$('.menu_icon').on('click',function(){
  if($('.menu_icon').hasClass('open')){
    $(this).removeClass('open');
    $(this).animate({
      "right":"20px",
      "background-position":"0px"
    });
    $('#menu').animate({"right":"-300px"});
    $('body').css("margin-right","");
  }
  else{
    $(this).addClass('open');
    $(this).animate({
      "right":"310px",
      "background-position":"-40px"
    });
    $('#menu').animate({"right":"0px"});
    $('body').css("margin-right", "300px");
  }
});

这样，您只需要将open类添加到菜单中，其余的工作将由CSS负责。您需要弄乱布局以适应较小的尺寸，但这应该很容易。

切换时，侧面导航栏会更改页面内容的对齐方式

1 个答案: