本文实例讲述了JS+CSS实现的漂亮渐变背景特效代码。分享给大家供大家参考，具体如下：
运行效果截图如下： 具体代码如下： <html>
<head>
<title>
JS配合CSS实现的漂亮渐变背景特效6个实例 </title> <script>
var setGradient = (function() {
var p_dCanvas = document.createElement('canvas');
var p_useCanvas = !!(typeof(p_dCanvas.getContext) == 'function');
var p_dCtx = p_useCanvas ? p_dCanvas.getContext('2d') : null;
var p_isIE = /*@cc_on!@*/ false; try {
p_dCtx.canvas.toDataURL() } catch(err) {
p_useCanvas = false; };
if (p_useCanvas) {
return function(dEl, sColor1, sColor2, bRepeatY) { if (typeof(dEl) == 'string') dEl = document.getElementById(dEl);
if (!dEl) return false;
var nW = dEl.offsetWidth; var nH = dEl.offsetHeight; p_dCanvas.width = nW; p_dCanvas.height = nH; var dGradient; var sRepeat; if (bRepeatY) {
dGradient = p_dCtx.createLinearGradient(0, 0, nW, 0);
sRepeat = 'repeat-y'; } else {
dGradient = p_dCtx.createLinearGradient(0, 0, 0, nH);
sRepeat = 'repeat-x'; }
dGradient.addColorStop(0, sColor1); dGradient.addColorStop(1, sColor2); p_dCtx.fillStyle = dGradient; p_dCtx.fillRect(0, 0, nW, nH); var sDataUrl = p_dCtx.canvas.toDataURL('image/png');
with(dEl.style) {
backgroundRepeat = sRepeat;
backgroundImage = 'url(' + sDataUrl + ')';
backgroundColor = sColor2; }; }
} else if (p_isIE) {
p_dCanvas = p_useCanvas = p_dCtx = null;
return function(dEl, sColor1, sColor2, bRepeatY) { if (typeof(dEl) == 'string') dEl = document.getElementById(dEl);
if (!dEl) return false; dEl.style.zoom = 1;
var sF = dEl.currentStyle.filter;
dEl.style.filter += ' ' + ['progid:DXImageTransform.Microsoft.gradient( GradientType=', +( !! bRepeatY), ',enabled=true,startColorstr=', sColor1, ', endColorstr=', sColor2, ')'].join(''); }; } else {
p_dCanvas = p_useCanvas = p_dCtx = null; return function(dEl, sColor1, sColor2) {
if (typeof(dEl) == 'string') dEl = document.getElementById(dEl);
if (!dEl) return false; with(dEl.style) {
backgroundColor = sColor2; }; } } })(); </script> <style>
body{font:0.75em/1.4 Arial;text-align:left;margin:20px;} hr{clear:both;visibility:hidden;}
xmp{font:12px/12px \New\
border:solid
1px #ccc;} div.example{ border:solid 1px #555;margin:0 20px 20px 0;float:left; display:inline;margin:1em;background:#fff;width:300px;padding:40px;color:#222;font:xx-small/1.2
\ </style> <body>
<div id=\ CSS特效代码。 </div>
<div id=\ 各类编程源码、 </div>
<div id=\ 精品软件 </div>
<div id=\ 上海世博园 </div>
<div id=\ 我家北京天安门 </div>
<div id=\ 北京欢迎您！ </div> <script>
setGradient('example1', '#4ddbbe', '#d449cc', 1); setGradient('example2', '#46ddbd', '#d8b617', 0); setGradient('example3', '#c81fc1', '#bf445f', 1); setGradient('example4', '#2285e5', '#d769eb', 0); setGradient('example5', '#8b4286', '#eac87d', 1); setGradient('example6', 'black', 'white', 0); </script> </body> </html>
希望本文所述对大家JavaScript程序设计有所帮助。
JS CSS实现的漂亮渐变背景特效代码(6个渐变效果)
