html和CSS中一些方法

占据页面空间

visibility: hidden;

不占据页面空间

display: none;

.el:after {content:"", display: table; clear:both;}

视口宽度

<meta name="viewport" content="width=device-width,initial-scale=1" />

视口宽度最小为980px时，即大于等于

@media only screen and (min-width: 980px) { }

word-wrap: break-word;

table-layout: fixed;

overflow: auto;