将过渡添加到侧面导航栏

问题描述 投票：0回答：1

我有一个带有侧面导航栏的站点，该站点应通过右侧过渡，然后在您将其关闭时，它会过渡回该侧。即使我使用了这段代码，当我以0.5s的过渡关闭侧边栏时，它也可以工作，但是当我打开菜单时，它不会过渡，而只是显示！任何帮助，将不胜感激！

这是我的代码

window.onclick = function(event){if(event.target == document.getElementById('outerNav')){closeNav();}};

function openNav() {
    document.getElementById("outerNav").style.display = "block";
    document.getElementById("mySidenav").style.transition = "0.5s";//I try to add the transition again. But it still doesn't display
    document.getElementById("mySidenav").style.width = "250px";
    document.getElementById("main").style.marginLeft = "250px";
    document.body.style.backgroundColor = "rgba(0,0,0,0.4)";
}

function closeNav() {
    document.getElementById("mySidenav").style.width = "0";
    document.getElementById("main").style.marginLeft= "0";
    document.body.style.backgroundColor = "white";
    setTimeout(function(){
        document.getElementById("outerNav").style.display = "none";
    },500);
}

body {
    font-family: "Lato", sans-serif;
    transition: background-color .5s;
}

.sidenav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
}

.sidenav a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
}

.sidenav a:hover {
    color: #f1f1f1;
}

.sidenav .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
}

#main {
    transition: margin-left .5s;
    padding: 16px;
}

@media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
}.outerNav {
    display:none;
    position:fixed;
    left:0;
    top:0;
    width:100%;
    height:100%;
    overflow:hidden;
    background-color:transparent;
}

<body>
    <div id="outerNav" class="outerNav">
        <div id="mySidenav" class="sidenav">
            <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">&times;</a>
            <a href="#">About</a>
            <a href="#">Services</a>
            <a href="#">Clients</a>
            <a href="#">Contact</a>
        </div>
    </div>
    <div id="main">
        <h2>Sidenav Push Example</h2>
        <p>Click on the element below to open the side navigation menu, and push this content to the right. Notice that we add a black see-through background-color to body when the sidenav is opened.</p>
        <span style="font-size:30px;cursor:pointer" onclick="openNav()">&#9776; open</span>
    </div>
</body>
javascript html css css-transitions nav
1个回答
0
投票

问题是您的外部资产。当您打开菜单时，将其设置为“ display：block”-无需过渡即可进行。如果您还通过过渡将其大小从0％调整为100％，则它应该起作用。请参阅摘要：

window.onclick = function(event) {
  if (event.target == document.getElementById('outerNav')) {
    closeNav();
  }
};

function openNav() {
  document.getElementById("outerNav").style.display = "block";
  document.getElementById("outerNav").style.width = "100%"; //added this for opening the menu
  document.getElementById("mySidenav").style.transition = "0.5s"; //I try to add the transition again. But it still doesn't display
  document.getElementById("mySidenav").style.width = "250px";
  document.getElementById("main").style.marginLeft = "250px";
  document.body.style.backgroundColor = "rgba(0,0,0,0.4)";
}

function closeNav() {
  document.getElementById("mySidenav").style.width = "0";
  document.getElementById("main").style.marginLeft = "0";
  document.body.style.backgroundColor = "white";
  setTimeout(function() {
    document.getElementById("outerNav").style.display = "none";
  }, 500);
}
body {
  font-family: "Lato", sans-serif;
  transition: background-color .5s;
}

.sidenav {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: #111;
  overflow-x: hidden;
  transition: 0.5s;
  padding-top: 60px;
}

.sidenav a {
  padding: 8px 8px 8px 32px;
  text-decoration: none;
  font-size: 25px;
  color: #818181;
  display: block;
  transition: 0.3s;
}

.sidenav a:hover {
  color: #f1f1f1;
}

.sidenav .closebtn {
  position: absolute;
  top: 0;
  right: 25px;
  font-size: 36px;
  margin-left: 50px;
}

#main {
  transition: margin-left .5s;
  padding: 16px;
}

@media screen and (max-height: 450px) {
  .sidenav {
    padding-top: 15px;
  }
  .sidenav a {
    font-size: 18px;
  }
}

.outerNav {
  display: block;
  position: fixed;
  left: 0;
  top: 0;
  width: 0%;
  /* 0% when Menu is closed */
  height: 100%;
  overflow: hidden;
  background-color: transparent;
}
<body>
  <div id="outerNav" class="outerNav">
    <div id="mySidenav" class="sidenav">
      <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">&times;</a>
      <a href="#">About</a>
      <a href="#">Services</a>
      <a href="#">Clients</a>
      <a href="#">Contact</a>
    </div>
  </div>
  <div id="main">
    <h2>Sidenav Push Example</h2>
    <p>Click on the element below to open the side navigation menu, and push this content to the right. Notice that we add a black see-through background-color to body when the sidenav is opened.</p>
    <span style="font-size:30px;cursor:pointer" onclick="openNav()">&#9776; open</span>
  </div>
</body>
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