Syntax usage scenarios of contain in CSS
In CSS, contain is a useful attribute used to specify whether the content of an element is independent of its external style and layout . It helps developers better control page layout and optimize performance. This article will introduce the syntax usage scenarios of the contain attribute and provide specific code examples. The syntax of the
contain attribute is as follows:
contain: layout|paint|size|style|'none'|'strict'|'content';
<style> .container { contain: layout; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
<style> .container { contain: paint; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
<style> .container { contain: size; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
<style> .container { contain: style; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
<style> .container { contain: none; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
<style> .container { contain: strict; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
<style> .container { contain: content; } .box { width: 100px; height: 100px; background-color: red; } </style> <div class="container"> <div class="box"></div> </div>
To sum up, the usage scenarios of the contain attribute in CSS can be optimized from aspects such as layout, drawing, size, style and content. . By setting the contain attribute, we can make an element independent of other elements in specific aspects, thereby improving the performance and efficiency of the page.
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