Question

我使用Pure CSS结合layout作为垂直菜单。但是，如果最小屏幕宽度太低，我会尝试将代码调整为水平菜单，而不是垂直侧边菜单，它会消失在屏幕顶部。我似乎非常接近，但如果达到最小宽度，我无法让菜单消失。尝试在整个片段中进行全屏显示，并使窗口大小更小/更大。我做错了什么？

http://jsfiddle.net/ov3f2gLr/

＆＃13;

(function(window, document) {

  var layout = document.getElementById('layout'),
    menu = document.getElementById('menu'),
    menuLink = document.getElementById('menuLink');

  function toggleClass(element, className) {
    var classes = element.className.split(/\s+/),
      length = classes.length,
      i = 0;

    for (; i < length; i++) {
      if (classes[i] === className) {
        classes.splice(i, 1);
        break;
      }
    }
    // The className is not found
    if (length === classes.length) {
      classes.push(className);
    }

    element.className = classes.join(' ');
  }

  menuLink.onclick = function(e) {
    var active = 'active';

    e.preventDefault();
    toggleClass(layout, active);
    toggleClass(menu, active);
    toggleClass(menuLink, active);
  };

}(this, this.document));

＆＃13;

body {
    background-color: black;
}

.pure-img-responsive {
    max-width: 100%;
    height: auto;
}

/*
Add transition to containers so they can push in and out.
*/
#layout,
#menu,
.menu-link {
    -webkit-transition: all 0.2s ease-out;
    -moz-transition: all 0.2s ease-out;
    -ms-transition: all 0.2s ease-out;
    -o-transition: all 0.2s ease-out;
    transition: all 0.2s ease-out;
}

/*
This is the parent `<div>` that contains the menu and the content area.
*/
#layout {
    position: relative;
    padding-left: 0;
}

#layout.active {
    position: relative;
    left: 150px;
}

#layout.active #menu {
    left: 150px;
    width: 150px;
}

#layout.active .menu-link {
    left: 150px;
}
/*
The content `<div>` is where all your content goes.
*/
.content {
    margin: 0 auto;
    padding: 0 2em;
    max-width: 800px;
    margin-bottom: 50px;
    line-height: 1.6em;
}

.header {
    margin: 0;
    color: #333;
    text-align: center;
    padding: 2.5em 2em 0;
    border-bottom: 1px solid #eee;
}

.header h1 {
    margin: 0.2em 0;
    font-size: 3em;
    font-weight: 300;
}

.header h2 {
    font-weight: 300;
    color: #ccc;
    padding: 0;
    margin-top: 0;
}

.content-subhead {
    margin: 50px 0 20px 0;
    font-weight: 300;
    color: #888;
}



/*
The `#menu` `<div>` is the parent `<div>` that contains the `.pure-menu` that
appears on the left side of the page.
*/

/* -- Dynamic Button For Responsive Menu -------------------------------------*/

/*
The button to open/close the Menu is custom-made and not part of Pure. Here's
how it works:
*/

/*
`.menu-link` represents the responsive menu toggle that shows/hides on
small screens.
*/
.menu-link {
    position: fixed;
    display: block; /* show this only on small screens */
    top: 0;
    left: 0; /* "#menu width" */
    background: #000;
    background: rgba(0,0,0,0.7);
    font-size: 10px; /* change this value to increase/decrease button size */
    z-index: 10;
    width: 2em;
    height: auto;
    padding: 2.1em 1.6em;
}

.menu-link:hover,
.menu-link:focus {
    background: #000;
}

.menu-link span {
    position: relative;
    display: block;
}

.menu-link span,
.menu-link span:before,
.menu-link span:after {
    background-color: #fff;
    width: 100%;
    height: 0.2em;
}

.menu-link span:before,
.menu-link span:after {
    position: absolute;
    margin-top: -0.6em;
    content: " ";
}

.menu-link span:after {
    margin-top: 0.6em;
}


/* -- Responsive Styles (Media Queries) ------------------------------------- */

/*
Hides the menu at `48em`, but modify this based on your app's needs.
*/
@media (min-width: 48em) {

    .header,
    .content {
        padding-left: 2em;
        padding-right: 2em;
        padding-bottom: 2em;
    }

    #layout {
        left: 0;
    }

    #menu {
        left: 150px;
    }

    .menu-link {
        position: fixed;
        left: 150px;
        display: none;
    }

    #layout.active .menu-link {
        left: 150px;
    }
}

/*!
Pure v0.5.0
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
https://github.com/yui/pure/blob/master/LICENSE.md
*/
/*!
normalize.css v1.1.3 | MIT License | git.io/normalize
Copyright (c) Nicolas Gallagher and Jonathan Neal
*/
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li.pure-menu-disabled a:focus{background:#fff;color:#bfbfbf}.pure-menu .pure-menu-disabled>a{background-image:none;border-color:transparent;cursor:default}.pure-menu .pure-menu-disabled>a,.pure-menu .pure-menu-can-have-children.pure-menu-disabled>a:after{color:#bfbfbf}.pure-menu .pure-menu-heading{color:#565d64;text-transform:uppercase;font-size:90%;margin-top:.5em;border-bottom-width:1px;border-bottom-style:solid;border-bottom-color:#dfdfdf}.pure-menu .pure-menu-selected a{color:#000}.pure-menu.pure-menu-open.pure-menu-fixed{border:0;border-bottom:1px solid #b7b7b7}.pure-paginator{letter-spacing:-.31em;*letter-spacing:normal;*word-spacing:-.43em;text-rendering:optimizespeed;list-style:none;margin:0;padding:0}.opera-only :-o-prefocus,.pure-paginator{word-spacing:-.43em}.pure-paginator li{display:inline-block;*display:inline;zoom:1;letter-spacing:normal;word-spacing:normal;vertical-align:top;text-rendering:auto}.pure-paginator .pure-button{border-radius:0;padding:.8em 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td{background-color:transparent}.pure-table-odd td{background-color:#f2f2f2}.pure-table-striped tr:nth-child(2n-1) td{background-color:#f2f2f2}.pure-table-bordered td{border-bottom:1px solid #cbcbcb}.pure-table-bordered tbody>tr:last-child td,.pure-table-horizontal tbody>tr:last-child td{border-bottom-width:0}.pure-table-horizontal td,.pure-table-horizontal th{border-width:0 0 1px;border-bottom:1px solid #cbcbcb}.pure-table-horizontal tbody>tr:last-child td{border-bottom-width:0}

＆＃13;

<div id="layout">
  <!-- Menu toggle -->
  <a href="#menu" id="menuLink" class="menu-link">
    <!-- Hamburger icon -->
    <span></span>
  </a>
  <div id="menu" class="pure-menu pure-menu-open pure-menu-horizontal">
    <a href="#" class="pure-menu-heading">Site Title</a>
    <ul>
      <li><a href="#">Home</a>
      </li>
      <li><a href="#">News</a>
      </li>
      <li><a href="#">Information</a>
      </li>
      <li><a href="#">Bla bla</a>
      </li>
      <li><a href="#">Etcetera</a>
      </li>
      <li><a href="#">Tony the pony</a>
      </li>
      <li><a href="#">He is coming</a>
      </li>
    </ul>
  </div>
</div>

Lorem Ipsum bla bla bla

＆＃13;

Answer 1

(function(window, document) {

  var layout = document.getElementById('layout'),
    menu = document.getElementById('menu'),
    menuLink = document.getElementById('menuLink');

  function toggleClass(element, className) {
    var classes = element.className.split(/\s+/),
      length = classes.length,
      i = 0;

    for (; i < length; i++) {
      if (classes[i] === className) {
        classes.splice(i, 1);
        break;
      }
    }
    // The className is not found
    if (length === classes.length) {
      classes.push(className);
    }

    element.className = classes.join(' ');
  }

  menuLink.onclick = function(e) {
    var active = 'active';

    e.preventDefault();
    toggleClass(layout, active);
    toggleClass(menu, active);
    toggleClass(menuLink, active);
  };

}(this, this.document));

body {
    background-color: black;
}

.pure-img-responsive {
    max-width: 100%;
    height: auto;
}

/*
Add transition to containers so they can push in and out.
*/
#layout,
#menu,
.menu-link {
    -webkit-transition: all 0.2s ease-out;
    -moz-transition: all 0.2s ease-out;
    -ms-transition: all 0.2s ease-out;
    -o-transition: all 0.2s ease-out;
    transition: all 0.2s ease-out;
}

/*
This is the parent `<div>` that contains the menu and the content area.
*/
#layout {
    position: relative;
    padding-left: 0;
}

#layout.active {
    position: relative;
    left: 150px;
}

#layout.active #menu {
    left: 150px;
    width: 150px;
display:block;
}

#layout.active .menu-link {
    left: 150px;
}
/*
The content `<div>` is where all your content goes.
*/
.content {
    margin: 0 auto;
    padding: 0 2em;
    max-width: 800px;
    margin-bottom: 50px;
    line-height: 1.6em;
}

.header {
    margin: 0;
    color: #333;
    text-align: center;
    padding: 2.5em 2em 0;
    border-bottom: 1px solid #eee;
}

.header h1 {
    margin: 0.2em 0;
    font-size: 3em;
    font-weight: 300;
}

.header h2 {
    font-weight: 300;
    color: #ccc;
    padding: 0;
    margin-top: 0;
}

.content-subhead {
    margin: 50px 0 20px 0;
    font-weight: 300;
    color: #888;
}
#menu{
display:none;    
}

/*
The `#menu` `<div>` is the parent `<div>` that contains the `.pure-menu` that
appears on the left side of the page.
*/

/* -- Dynamic Button For Responsive Menu -------------------------------------*/

/*
The button to open/close the Menu is custom-made and not part of Pure. Here's
how it works:
*/

/*
`.menu-link` represents the responsive menu toggle that shows/hides on
small screens.
*/
.menu-link {
    position: fixed;
    display: block; /* show this only on small screens */
    top: 0;
    left: 0; /* "#menu width" */
    background: #000;
    background: rgba(0,0,0,0.7);
    font-size: 10px; /* change this value to increase/decrease button size */
    z-index: 10;
    width: 2em;
    height: auto;
    padding: 2.1em 1.6em;
}

.menu-link:hover,
.menu-link:focus {
    background: #000;
}

.menu-link span {
    position: relative;
    display: block;
}

.menu-link span,
.menu-link span:before,
.menu-link span:after {
    background-color: #fff;
    width: 100%;
    height: 0.2em;
}

.menu-link span:before,
.menu-link span:after {
    position: absolute;
    margin-top: -0.6em;
    content: " ";
}

.menu-link span:after {
    margin-top: 0.6em;
}


/* -- Responsive Styles (Media Queries) ------------------------------------- */

/*
Hides the menu at `48em`, but modify this based on your app's needs.
*/
@media (min-width: 48em) {

    .header,
    .content {
        padding-left: 2em;
        padding-right: 2em;
        padding-bottom: 2em;
    }

    #layout {
        left: 0;
    }

    #menu {
        left: 150px;
display:block;
    }

    .menu-link {
        position: fixed;
        left: 150px;
        display: none;
    }

    #layout.active .menu-link {
        left: 150px;
    }
}

/*!
Pure v0.5.0
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
https://github.com/yui/pure/blob/master/LICENSE.md
*/
/*!
normalize.css v1.1.3 | MIT License | git.io/normalize
Copyright (c) Nicolas Gallagher and Jonathan Neal
*/
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<div id="layout">
  <!-- Menu toggle -->
  <a href="#menu" id="menuLink" class="menu-link">
    <!-- Hamburger icon -->
    <span></span>
  </a>
  <div id="menu" class="pure-menu pure-menu-open pure-menu-horizontal">
    <a href="#" class="pure-menu-heading">Site Title</a>
    <ul>
      <li><a href="#">Home</a>
      </li>
      <li><a href="#">News</a>
      </li>
      <li><a href="#">Information</a>
      </li>
      <li><a href="#">Bla bla</a>
      </li>
      <li><a href="#">Etcetera</a>
      </li>
      <li><a href="#">Tony the pony</a>
      </li>
      <li><a href="#">He is coming</a>
      </li>
    </ul>
  </div>
</div>

Lorem Ipsum bla bla bla

只需在以下三个位置将显示css属性添加到 #menu div ：

1.在活动班级中显示用户点击菜单按钮时的菜单

#layout.active #menu {
    left: 150px;
    width: 150px;
    display:block;
}

2.媒体查询中宽度 超过48em 显示菜单

@media (min-width: 48em) { 
 #menu {
        left: 150px;
         display:block;
    }
}

3。 隐藏菜单 宽度小于48em ，可以在没有媒体查询的情况下编写，因为媒体查询中已经提到了一个条件

#menu{
display:none;
}

水平响应导航栏纯CSS麻烦

1 个答案: