将div的80%背景颜色设置为一种颜色

Question

我有一个div和背景颜色是红色.现在我想留下80%保持红色,在右边部分保持20%没有颜色或透明.是否可以仅在不添加更多div或更改div的填充的情况下更改css？我希望div保持原始尺寸.

Answer 1

.myClass
{
    background: -moz-linear-gradient(top, rgba(30,87,153,0) 0%, rgba(41,137,216,0) 20%, rgba(255,48,48,1) 21%, rgba(255,0,0,1) 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(30,87,153,0)), color-stop(20%,rgba(41,137,216,0)), color-stop(21%,rgba(255,48,48,1)), color-stop(100%,rgba(255,0,0,1))); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, rgba(30,87,153,0) 0%,rgba(41,137,216,0) 20%,rgba(255,48,48,1) 21%,rgba(255,0,0,1) 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, rgba(30,87,153,0) 0%,rgba(41,137,216,0) 20%,rgba(255,48,48,1) 21%,rgba(255,0,0,1) 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, rgba(30,87,153,0) 0%,rgba(41,137,216,0) 20%,rgba(255,48,48,1) 21%,rgba(255,0,0,1) 100%); /* IE10+ */
    background: linear-gradient(to bottom, rgba(30,87,153,0) 0%,rgba(41,137,216,0) 20%,rgba(255,48,48,1) 21%,rgba(255,0,0,1) 100%); /* W3C */
}

结果: