我在定位ul div時遇到了問題。我嘗試將它浮動到左側以將其放置在那裏。但它在標題,容器和導航欄div下面。而divs完全在ul div之上。爲什麼?爲什麼header,container和navbar div在ul div之上?
html {
height: 100%;
}
body {
height: 100%;
width: 100%;
background-color: grey;
margin: 0;
padding: 0;
}
#container {
width: 80%;
margin: auto;
height: auto;
border: 1px solid red;
}
#header {
width: 100%;
border: 2px solid blue;
}
.navbar {
width: 100%;
border: 2px solid green;
}
ul {
margin: 0;
padding: 0;
float: left;
}
li {
display: inline;
font-size: 20px;
}
<div id="container">
<div class="header">
<div class="navbar">
<ul>
<li><a href="#">NAV1</a></li>
<li><a href="#">NAV2</a></li>
<li><a href="#">NAV3</a></li>
</ul>
</div>
</div>
</div>
您可能需要閱讀本https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Block_formatting_context和https:// CSS-技巧。 com/all-about-floats/:)(overflow:hiden,or float:left;或display:table or elsse from your reading applied to header will fix the behavior of header and wrap the floatinging child –