需要基本的HTML帮助

时间:2019-04-07 14:56:30

标签: html css

我只是想将导航栏拉伸到最大高度。

我是html,css的新手,对此一无所知。我已经尝试了互联网上几乎所有的解决方案,但还是一无所获。下面是样式和html代码。我给所有父容器都加了全高。不知道是什么原因引起的。我从互联网上挑选了样式,并了解了大多数样式。

body,
html {
  height: 100vh;
}

div {
  overflow: hidden;
  height: 100%;
  position: relative;
  background-color: aqua;
}

nav {
  display: block;
  text-align: center;
  height: 100vh !important;
  float: left;
  position: absolute;
}

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  height: unset !important;
}

.nav a {
  display: block;
  background: #111;
  color: #fff;
  text-decoration: none;
  padding: 0.8em 1.8em;
  text-transform: uppercase;
  font-size: 80%;
  letter-spacing: 2px;
  text-shadow: 0 -1px 0 #000;
  position: relative;
}

.nav {
  vertical-align: top;
  display: inline-block;
  box-shadow: 1px -1px -1px 1px #000, -1px 1px -1px 1px #fff, 0 0 6px 3px #fff;
  border-radius: 6px;
  height: 100vh !important;
}

.nav li {
  position: relative;
}

.nav>li {
  float: left;
  border-bottom: 4px #aaa solid;
  margin-right: 1px;
}

.nav>li>a {
  margin-bottom: 1px;
  box-shadow: inset 0 2em .33em -0.5em #555;
}

.nav>li:hover,
.nav>li:hover>a {
  border-bottom-color: orange;
}

.nav li:hover>a {
  color: orange;
}

.nav>li:first-child {
  border-radius: 4px 0 0 4px;
}

.nav>li:first-child>a {
  border-radius: 4px 0 0 0;
}

.nav>li:last-child {
  border-radius: 0 0 4px 0;
  margin-right: 0;
}

.nav>li:last-child>a {
  border-radius: 0 4px 0 0;
}

.nav li li a {
  margin-top: 1px;
}

.nav li a:first-child:nth-last-child(2):before {
  content: "";
  position: absolute;
  height: 0;
  width: 0;
  border: 5px solid transparent;
  top: 50%;
  right: 5px;
}
/* submenu positioning*/

.nav ul {
  position: absolute;
  white-space: nowrap;
  border-bottom: 5px solid orange;
  z-index: 1;
  left: -99999em;
}

.nav>li:hover>ul {
  left: auto;
  margin-top: 5px;
  min-width: 100%;
}

.nav>li li:hover>ul {
  left: 100%;
  margin-left: 1px;
  top: -1px;
}
/* arrow hover styling */

.nav>li>a:first-child:nth-last-child(2):before {
  border-top-color: #aaa;
}

.nav>li:hover>a:first-child:nth-last-child(2):before {
  border: 5px solid transparent;
  border-bottom-color: orange;
  margin-top: -5px
}

.nav li li>a:first-child:nth-last-child(2):before {
  border-left-color: #aaa;
  margin-top: -5px
}

.nav li li:hover>a:first-child:nth-last-child(2):before {
  border: 5px solid transparent;
  border-right-color: orange;
  right: 10px;
}
<div>
  <nav>
    <ul class="nav">
      <li><a href="#">About</a></li>
      <li>
        <a href="#">Portfolio</a>
        <ul>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
        </ul>
      </li>
      <li>
        <a href="#">Resume</a>
        <ul>
          <li><a href="#">item a lonng submenu</a></li>
          <li>
            <a href="#">item</a>
            <ul>
              <li><a href="#">Ray</a></li>
              <li><a href="#">Veronica</a></li>
              <li><a href="#">Bushy</a></li>
              <li><a href="#">Havoc</a></li>
            </ul>
          </li>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
        </ul>
      </li>
      <li><a href="#">Download</a></li>
      <li>
        <a href="#">Rants</a>
        <ul>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
          <li><a href="#">item</a></li>
        </ul>
      </li>
      <li><a href="#">Contact</a></li>




    </ul>
  </nav>
</div>

1 个答案:

答案 0 :(得分:0)

为什么要将nav元素的最大高度设置为100vh?如果要使用全宽,则需要设置宽度:100vw; vw =“相对于视口宽度的1%”,vh是高度。

一个简单的栏将是:

<body>
<nav></nav>
</body>

<script>
    body { padding: 0; margin: 0}
    nav { width: 100vw;height: 50px;background-color: blue;position: fixed;top: 0}
</script>