粘性位置：标题在一段时间后滚动离开

问题描述 投票：0回答：3

在我的网站上，我已将 

<nav>
粘在顶部，但当我向下滚动时它只粘了几秒/像素，然后它就滚走了，请参阅下面的代码片段并向下滚动。我希望向下滚动时 
nav
始终粘在顶部，除非 
<header>
可见。

HTML

<!DOCTYPE html>
<html>
    <head>
        <title>Danis Website</title>
        <link href="reset.css" type="text/css" rel="stylesheet">
        <link href="style.css" type="text/css" rel="stylesheet">
    </head>
    <body>
        <div id="wrapper">
            <header>
                <h1>Danis Website</h1>
            </header>
            <nav>
                <ul>
                    <li><a href="index.html">Home</a></li>
                    <li><a href="rezepte.html">Rezepte</a></li>
                    <li><a href="zutaten.html">Zutaten</a></li>   
                </ul>
            </nav>
            <main>
                Main Main Main<!-- In the code snippet below here are more lines of Text, here if have omitted the lines for better readability.

            </main>
            <footer>
                Footer
            </footer>
            </div>
    </body>
</html>

CSS

*{
    margin: 0;
    padding: 0;
}
body, html{
    height: 100%;
    width: 90%;
    margin: 0 auto;
    background-color: #aaa;
}


#wrapper{
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: fuchsia;
}

header{
    flex: 0 0 50px;
    background-color: #888;
    text-align: center;
    position: sticky;
    top: 100px;
}

nav{
    flex: 0 0 50px;
    background-color: dodgerblue;
}

nav ul {
    display: flex;
    list-style-type: none;
    background-color: dodgerblue;
    height: 100%;
}

nav ul li {
    flex: 1;
    text-align: center;
    padding: 10px;
    border-left: 2px solid #aaa;
}

nav ul li:first-child {
    border-left: 0;
}

nav ul li a{
    color: white;   
    text-decoration: none;
}

nav ul li:hover {
    background-color: #888;
}

main{
    flex: 1;
    background-color: #ddd;
}

footer{
    flex: 0 0 50px;
    background-color: #888;
}

#list{
    display: flex;
    flex-wrap: wrap;
}

#list-item{
    flex: 0 1 300px;
    display: flex;
    border: 1px solid dodgerblue;
    margin: 10px;
    padding: 10px;
}

#list-item-img{
    flex: 0 0 auto;
    margin-right: 5px;
}

#list-item-text{
    flex: 1;
    margin-left: 5px;
}

#list-item-text p {
    margin: 5px;
}


*{
    margin: 0;
    padding: 0;
}
body, html{
    height: 100%;
    width: 90%;
    margin: 0 auto;
    background-color: #aaa;
}


#wrapper{
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: fuchsia;
}

header{
    flex: 0 0 50px;
    background-color: #888;
    text-align: center;
}

nav{
    flex: 0 0 50px;
    background-color: dodgerblue;
    position: sticky;
    top: 0px;
}

nav ul {
    display: flex;
    list-style-type: none;
    background-color: dodgerblue;
    height: 100%;
}

nav ul li {
    flex: 1;
    text-align: center;
    padding: 10px;
    border-left: 2px solid #aaa;
}

nav ul li:first-child {
    border-left: 0;
}

nav ul li a{
    color: white;   
    text-decoration: none;
}

nav ul li:hover {
    background-color: #888;
}

main{
    flex: 1;
    background-color: #ddd;
}

footer{
    flex: 0 0 50px;
    background-color: #888;
}

#list{
    display: flex;
    flex-wrap: wrap;
}

#list-item{
    flex: 0 1 300px;
    display: flex;
    border: 1px solid dodgerblue;
    margin: 10px;
    padding: 10px;
}

#list-item-img{
    flex: 0 0 auto;
    margin-right: 5px;
}

#list-item-text{
    flex: 1;
    margin-left: 5px;
}

#list-item-text p {
    margin: 5px;
}  
 
        <div id="wrapper">
            <header>
                <h1>Danis Website</h1>
            </header>
            <nav>
                <ul>
                    <li><a href="index.html">Home</a></li>
                    <li><a href="rezepte.html">Rezepte</a></li>
                    <li><a href="zutaten.html">Zutaten</a></li>   
                </ul>
            </nav>
            <main>
                Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main Main 
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            </main>
            <footer>
                Footer
            </footer>
            </div>
编辑：我在 Arch Linux 上使用 Firefx 37.0.2

html css scroll position sticky
3个回答
19
投票

我相信这可能是因为你的

height: 100%
上有
body
。当您的内容太长时，
body
不会环绕整个内容，而只是继承浏览器视口高度。因此，当您滚动经过 
body
的底部时，
nav
就会停止粘住。

顺便说一句，虽然我认为你还不应该使用

position: sticky
。它的支持率不到浏览器的 20%。 http://caniuse.com/#feat=css-sticky

解决方案： 将 #wrapper 中的 

height: 100%;
替换为 
min-height: 100%;
。刚刚删除 
height: 100%;
时，页面小于内容未填充视口的页面上的视口

0
投票

我这里也有同样的棘手问题。

正如DigitalDouble所说，是内容高度问题， 但不仅仅是身体造成的

我在我的 JavaScript 代码中找到了它......

改变 $(contentElement).style.高度 = "99px";

到 $(contentElement).style.minHeight = "99px";

我希望它有帮助。 =)

0
投票

只需显示我在哪里遇到此问题（运行代码片段以查看为什么会发生）

html, body {
  /*it takes 100vh always */
  height: 100%;
  border: 1px solid red;
}

.section {
  /*there was a problem, because it also set to 100vh */
  height: 100%;
  /*remove it or change to fit-context*/
}
.header {
  top: 0;
  position: sticky;
  background: green;
}
.main > div {
  height: 200vh;
}
<html>
  <body>
    <section class="section">
      <header class="header">Header</header>
      <main class="main">
        <div>Hello</div>
      </main>
    </section>
  </body>
</html>

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