有没有一种方法可以在CSS中创建颜色渐变而不使用图像文件?
我正在尝试为一个DIV设置背景色渐变,使其看起来光滑。
Safari(Webkit)支持它: http://webkit.org/blog/175/introducing-css-gradients/
Firefox 3.6+ 支持它: https://developer.mozilla.org/en/CSS/-moz-linear-gradient
W3规范定义了对它的支持: http://dev.w3.org/csswg/css3-images/#gradients-
您可以使用Modernizr检测支持并回退到图像: http://www.modernizr.com/docs/#cssgradients
以“Sure Is”(使用Royal Blue颜色,十六进制代码为#002366作为例子(例子来自:http://www.99colors.net/name/royal-blue):
<div class="gradient">[Your DIV text and what not]</div>
/* CSS Background Gradient */
.gradient
{
background-color: #628AD9;
/* For WebKit (Safari, Chrome, etc) */
background: #628AD9 -webkit-gradient(linear, left top, left bottom, from(#001640), to(#628AD9)) no-repeat;
/* Mozilla,Firefox/Gecko */
background: #628AD9 -moz-linear-gradient(top, #001640, #628AD9) no-repeat;
/* IE 5.5 - 7 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#001640, endColorstr=#628AD9) no-repeat;
/* IE 8 */
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#001640, endColorstr=#001640)" no-repeat;
}
前往http://www.colorzilla.com/gradient-editor/#ffffff+0,e5e5e5+100;White+3D
您将看到它生成了显示的光泽渐变的以下代码。您可以更改渐变并复制新代码。
background: rgb(255,255,255); /* Old browsers */
/* IE9 SVG, needs conditional override of 'filter' to 'none' */
background: url(data:image/svg+xml;base64,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);
background: -moz-linear-gradient(top, rgba(255,255,255,1) 0%, rgba(229,229,229,1) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,1)), color-stop(100%,rgba(229,229,229,1))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(229,229,229,1) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(229,229,229,1) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(255,255,255,1) 0%,rgba(229,229,229,1) 100%); /* IE10+ */
background: linear-gradient(to bottom, rgba(255,255,255,1) 0%,rgba(229,229,229,1) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#e5e5e5',GradientType=0 ); /* IE6-8 */
Webkit浏览器支持纯CSS渐变,如此(在Safari或Chrome中查看此示例)-但实际上,为了跨浏览器实现,您需要使用图像。