在Bootstrap网站标题中使用的图像类型

Image type used in the Bootstrap websites header

本文关键字：图像 类型 Bootstrap 网站 标题      更新时间：2023-09-26

直接进入以下链接:

http://twitter.github.io/bootstrap/

看页面顶部的大背景图像。(它是蓝色和紫色)。我查看了那一页的源代码。但是我找不到那个背景的任何图像文件。所以我很好奇。

Any Help ?

试试这个Demo

ColorZilla是创建cross-browser兼容渐变的好工具。

.test{
    background: #020031;
    background: -moz-linear-gradient(45deg, #020031 0%, #6d3353 100%);
    background: -webkit-gradient(linear, left bottom, right top, color-stop(0%,#020031), color-stop(100%,#6d3353));
    background: -webkit-linear-gradient(45deg, #020031 0%,#6d3353 100%);
    background: -o-linear-gradient(45deg, #020031 0%,#6d3353 100%);
    background: -ms-linear-gradient(45deg, #020031 0%,#6d3353 100%);
    background: linear-gradient(45deg, #020031 0%,#6d3353 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#020031', endColorstr='#6d3353',GradientType=1 );
    height: 400px;
    width:100%;
}
.test:after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: url(http://twitter.github.io/bootstrap/assets/img/bs-docs-masthead-pattern.png) repeat center center;
    opacity: .4;
}

他们正在使用css3渐变和png图像与:after psedo类的组合

参见css

类
.jumbotron {
    position: relative;
    padding: 40px 0;
    color: #fff;
    text-align: center;
    text-shadow: 0 1px 3px rgba(0,0,0,.4), 0 0 30px rgba(0,0,0,.075);
    background: #020031;
    background: -moz-linear-gradient(45deg, #020031 0%, #6d3353 100%);
    background: -webkit-gradient(linear, left bottom, right top, color-stop(0%,#020031), color-stop(100%,#6d3353));
    background: -webkit-linear-gradient(45deg, #020031 0%,#6d3353 100%);
    background: -o-linear-gradient(45deg, #020031 0%,#6d3353 100%);
    background: -ms-linear-gradient(45deg, #020031 0%,#6d3353 100%);
    background: linear-gradient(45deg, #020031 0%,#6d3353 100%);
    filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#020031', endColorstr='#6d3353',GradientType=1 );
    -webkit-box-shadow: inset 0 3px 7px rgba(0,0,0,.2), inset 0 -3px 7px rgba(0,0,0,.2);
    -moz-box-shadow: inset 0 3px 7px rgba(0,0,0,.2), inset 0 -3px 7px rgba(0,0,0,.2);
    box-shadow: inset 0 3px 7px rgba(0,0,0,.2), inset 0 -3px 7px rgba(0,0,0,.2);
}

.jumbotron:after {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: url(../img/bs-docs-masthead-pattern.png) repeat center center;
    opacity: .4;
}
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