CSS overflow
属性控制什么 内容太大而无法放入某个区域。
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
#overflowTest {
background: #4CAF50;
color: white;
padding: 15px;
width: 50%;
height: 100px;
overflow: scroll;
border: 1px solid #ccc;
}
</style>
</head>
<body>
<h2>CSS Overflow</h2>
<p>The overflow property controls what happens to content that is too big to fit into an area.</p>
<div id="overflowTest">This text is really long and the height of its container is only 100 pixels. Therefore, a scrollbar is added to help the reader to scroll the content. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem vel eum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi. Nam liber tempor cum soluta nobis eleifend option congue nihil imperdiet doming id quod mazim placerat facer possim assum. Typi non habent claritatem insitam; est usus legentis in iis qui facit eorum claritatem.</div>
</body>
</html>
overflow
属性指定是否裁剪 内容或 当元素的内容太大而无法容纳指定的内容时添加滚动条 区域。
overflow
属性具有以下值:
visible
- 默认。溢出不会被剪裁。内容呈现在元素框之外
hidden
- 溢出部分被剪掉,其余内容将不可见
scroll
- 溢出部分被剪掉,并添加滚动条以查看其余内容
auto
- 与 scroll
类似,但仅在必要时添加滚动条
注意: overflow
属性仅适用于具有指定高度的块元素。
注意:在 OS X Lion(Mac 上)中,滚动条默认隐藏,仅在使用时显示(即使设置了“overflow:scroll”)。
溢出:可见
默认情况下,溢出是可见
,这意味着它不会被剪切并且会呈现在元素框之外:
div {
width: 200px;
height:
65px;
background-color: coral;
overflow: visible;
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
div {
background-color: coral;
width: 200px;
height: 65px;
border: 1px solid;
overflow: visible;
}
</style>
</head>
<body>
<h2>Overflow: visible</h2>
<p>By default, the overflow is visible, meaning that it is not clipped and it renders outside the element's box:</p>
<div>You can use the overflow property when you want to have better control of the layout. The overflow property specifies what happens if content overflows an element's box.</div>
</body>
</html>
溢出:隐藏
使用 hidden
值,溢出将被剪掉,其余内容将被隐藏:
div {
overflow: hidden;
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
div {
background-color: coral;
width: 200px;
height: 65px;
border: 1px solid black;
overflow: hidden;
}
</style>
</head>
<body>
<h2>Overflow: hidden</h2>
<p>With the hidden value, the overflow is clipped, and the rest of the content is hidden:</p>
<p>Try to remove the overflow property to understand how it works.</p>
<div>You can use the overflow property when you want to have better control of the layout. The overflow property specifies what happens if content overflows an element's box.</div>
</body>
</html>
溢出:滚动
将值设置为 scroll
,溢出将被剪裁,并添加滚动条以在框内滚动。请注意,这将添加水平和垂直滚动条(即使您不需要它):
div {
overflow: scroll;
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
div {
background-color: coral;
width: 200px;
height: 100px;
border: 1px solid black;
overflow: scroll;
}
</style>
</head>
<body>
<h2>Overflow: scroll</h2>
<p>Setting the overflow value to scroll, the overflow is clipped and a scrollbar is added to scroll inside the box. Note that this will add a scrollbar both horizontally and vertically (even if you do not need it):</p>
<div>You can use the overflow property when you want to have better control of the layout. The overflow property specifies what happens if content overflows an element's box.</div>
</body>
</html>
溢出:自动
auto
值与 scroll
类似,但它仅在必要时添加滚动条:
div {
overflow: auto;
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
div {
background-color: coral;
width: 200px;
height: 65px;
border: 1px solid black;
overflow: auto;
}
</style>
</head>
<body>
<h2>Overflow: auto</h2>
<p>The auto value is similar to scroll, only it add scrollbars when necessary:</p>
<div>You can use the overflow property when you want to have better control of the layout. The overflow property specifies what happens if content overflows an element's box.</div>
</body>
</html>
overflow-x
和 overflow-y
overflow-x
和 overflow-y
属性指定 是否仅水平或垂直更改内容的溢出(或 两个都):
overflow-x
指定如何处理左/右边缘 内容。
overflow-y
指定如何处理顶部/底部边缘 内容。
div {
overflow-x: hidden; /* Hide horizontal scrollbar
*/
overflow-y: scroll; /* Add vertical scrollbar */
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
div {
background-color: coral;
width: 200px;
height: 65px;
border: 1px solid black;
overflow-x: hidden;
overflow-y: scroll;
}
</style>
</head>
<body>
<h2>Overflow-x and overflow-y</h2>
<p>You can also change the overflow of content horizontally or vertically.</p>
<p>overflow-x specifies what to do with the left/right edges of the content.</p>
<p>overflow-y specifies what to do with the top/bottom edges of the content.</p>
<div>You can use the overflow property when you want to have better control of the layout. The overflow property specifies what happens if content overflows an element's box.</div>
</body>
</html>
指定如果内容溢出元素的框会发生什么
指定浏览器是否可以用长单词换行,如果 它们溢出了容器
指定当内容的左/右边缘溢出元素的内容区域时如何处理
指定当内容的顶部/底部边缘溢出元素的内容区域时如何处理