❮ CSS Functions Reference Example Use calc() to calculate the width of a element: #div1{ position:absolute; left:50px; width:calc(100% - 100px); border:1px solid black; background-color:yellow; padding:5px; text-align:center; } Try...
The width CSS property sets an element's width. By default, it sets the width of the content area, but if box-sizing is set to border-box, it sets the width of the border area.
percentage Percentage value div { width: 100%; } auto Browser will calculate the width for the element div { width: auto; } inherit Element will inherit the width from its parent element div { width: inherit; }Note The content area of an element is inside the padding, border, and margin...
Even you aren’t using a feature that is uniquely possible only withcalc(), it can be used to“show your work” inside CSS. For example, say you need to calculate exactly1⁄7th the width of an element… .el{/* This is easier to understand */width:calc(100%/7);/* Than this is...
properties tell the browser to look at the content of the element in order to determine its width. For instance, if we have the text: “hello CSS encyclopedia, nice to meet you!”, the browser would calculate the space that text would take up on the screen, and use it as the width....
width:200px; height:150px; padding:20px; font-size:1.5em; } HowwideamI? View Output The CSSwidthproperty is used to specify the width of an element. More specifically, thewidthproperty sets the width of thecontent areaorborder area(depending on the value of thebox-sizingproperty) of...
Let’s look at a concrete example usingdisplay: flex;. Our goal is to create 3 side by side elements that are tied to the width (100%) of the container. We also want to add a 30px gap between each element, and of course, we need it to be responsive!
calc() 函数用于动态计算长度值。 需要注意的是,运算符前后都需要保留一个空格,例如:width:calc(100% - 10px); 任何长度值都可以使用calc()函数进行计算;calc()函数支持 "+", "-", "*", "/" 运算;calc()函数使用标准的数学运算优先级规 ... ...
The height CSS property specifies the height of an element. By default, the property defines the height of the content area. If box-sizing is set to border-box, however, it instead determines the height of the border area.
width: 50%; } /* set other CSS properties, like text size */ strong { font-size: 150%; } Em emis the relative unit: it depends upon the value of the element'sfont-size. 例如父元素字体大小为 24px, 而子元素的字体大小定义为font-size: 0.5em, 则子元素的字体大小为 12px, 该单位通常...