you can get the width or height attribute of the element with javascript. But sometimes this method may not work, and the width or height of element is defined in the Css style. They cannot be got in this method. How should this be done?
AI代码解释 .box:after{content:"";position:absolute;z-index:-1;/* hide shadow behind image */box-shadow:015px 20pxrgba(0,0,0,0.3);width:70%;left:15%;/* one half of the remaining 30% (see width above) */height:100px;bottom:0;} 3.text-shadow 与 类似 box-shadow,它必须应用于文...
AI代码解释 html,body,div{margin:0;padding:0}.box{position:relative;margin:20px auto;display:table;width:200px;height:200px;background:#ddf;}.content{_position:relative;_top:50%;display:table-cell;vertical-align:middle;text-align:center;}.content>div{_position:relative;_top:-50%;}This is ...
width: 200px;/*不允许出现半汉字截断,不允许超出宽度*/overflow: hidden;/*自动隐藏文字*/text-overflow: ellipsis;/*文字隐藏后添加省略号*/white-space: nowrap;/*强制不换行*/}//多行省略.box { overflow: hidden;-webkit-line-clamp:2;//行数-webkit-box-orient: vertical; display:-webkit-box; } ...
document.getElementById("main").style.backgroundColor="blue"; 1. 使用CSS 控制页面的四种方式,分别为行内样式(内联样式)、内嵌式、链接式、导入式。 行内样式(内联样式)即写在 HTML 标签中的 style 属性中控制元素样式,如下代码示例: 1. 内嵌样式即写在 style 标签中,如下代码示例: div...
Font size of the root element! 很多时候,我们可以把rem作为em的替代品。特别是在font-size属性上的运用,但rem和em有一个最大的区别:任何值为1rem的元素都等于16px,当然,其前提是浏览器默认的font-size没有被用户重置,或者未显式的给html元素设置font-size值;另外,rem可以不管它的父元素的font-size*如何!
PropertyDescription height Sets the height of an element max-height Sets the maximum height of an element max-width Sets the maximum width of an element min-height Sets the minimum height of an element min-width Sets the minimum width of an element width Sets the width of an element...
border-box: padding和border被包含在定义的width和height之内。对象的实际宽度就等于设置的width值,即使定义有border和padding也不会改变对象的实际宽度,即 ( Element width = width ) 此属性表现为怪异模式下的盒模型。 示例代码: <!DOCTYPE html> 盒子模型 #box{ width: 100px; height: 100px; padding...
To horizontally center a block element (like ), usemargin: auto; Setting the width of the element will prevent it from stretching out to the edges of its container. The element will then take up the specified width, and the remaining space will be split equally between the two margins:...
max-width: The maximum width of an element* max-height: The maximum height of an element* padding: The space around the element's content (Note:Setting a background paints the padded space of an element) border: The border surrounding an element's padded space ...