网页背景动态渐变色
今天分享一段实现网页背景动态渐变的代码。 让你网站背景动态渐变起来！
效果还是十分不错的。 利用了jQuery实现的 将js代码放到你想加入的网页顶部即可。也可以单独写成一个js文件，然后引入那个js文件即可 下面是js代码：
代码语言：javascript复制window.Modernizr=function(Z,Y,X){function F(b){R.cssText=b}function E(d,c){return F(O.join(d ";") (c||""))}function D(d,c){return typeof d===c}function C(d,c){return !!~("" d).indexOf(c)}function B(g,c,j){for(var i in g){var h=c[g[i]];if(h!==X){return j===!1?g[i]:D(h,"function")?h.bind(j||c):h}}return !1}var W="2.8.3",V={},U=Y.documentElement,T="modernizr",S=Y.createElement(T),R=S.style,Q,P={}.toString,O=" -webkit- -moz- -o- -ms- ".split(" "),N={},M={},L={},K=[],J=K.slice,I,H={}.hasOwnProperty,G;!D(H,"undefined")&&!D(H.call,"undefined")?G=function(d,c){return H.call(d,c)}:G=function(d,c){return c in d&&D(d.constructor.prototype[c],"undefined")},Function.prototype.bind||(Function.prototype.bind=function(a){var h=this;if(typeof h!="function"){throw new TypeError}var g=J.call(arguments,1),f=function(){if(this instanceof f){var b=function(){};b.prototype=h.prototype;var d=new b,c=h.apply(d,g.concat(J.call(arguments)));return Object(c)===c?c:d}return h.apply(a,g.concat(J.call(arguments)))};return f}),N.cssgradients=function(){var e="background-image:",d="gradient(linear,left top,right bottom,from(#9f9),to(white));",f="linear-gradient(left top,#9f9, white);";return F((e "-webkit- ".split(" ").join(d e) O.join(f e)).slice(0,-e.length)),C(R.backgroundImage,"gradient")};for(var A in N){G(N,A)&&(I=A.toLowerCase(),V[I]=N[A](),K.push((V[I]?"":"no-") I))}return V.addTest=function(e,c){if(typeof e=="object"){for(var f in e){G(e,f)&&V.addTest(f,e[f])}}else{e=e.toLowerCase();if(V[e]!==X){return V}c=typeof c=="function"?c():c,typeof enableClasses!="undefined"&&enableClasses&&(U.className =" " (c?"":"no-") e),V[e]=c}return V},F(""),S=Q=null,V._version=W,V._prefixes=O,V}(this,this.document);
(function(e,c,a,g){var d="gradientify",f={angle:"0deg",fps:60,gradients:{},transition_time:8};function b(i,h){this.element=i;this.settings=e.extend({},f,h);this._defaults=f;this._name=d;this.init()}e.extend(b.prototype,{init:function(){if(!Modernizr.cssgradients){return}this.currentIndex=0;this.nextIndex=1;this.steps_count=0;this.steps_total=Math.round(this.settings.transition_time*this.settings.fps);this.rgb_steps={start:[0,0,0],stop:[0,0,0]};this.rgb_values={start:[0,0,0],stop:[0,0,0]};this.prefixes=["-webkit-","-moz-","-o-","-ms-",""];this.color1=null;this.color2=null;this.calculateSteps();setInterval(function(){this.updateGradient.apply(this)}.bind(this),Math.round(1000/this.settings.fps))},setNext:function(h){return(h 1<this.settings.gradients.length)?h 1:0},calculateStepSize:function(i,h){return(i-h)/this.steps_total},calculateSteps:function(){for(var j in this.rgb_values){if(this.rgb_values.hasOwnProperty(j)){for(var h=0;h<3;h ){this.rgb_values[j][h]=this.settings.gradients[this.currentIndex][j][h];this.rgb_steps[j][h]=this.calculateStepSize(this.settings.gradients[this.nextIndex][j][h],this.rgb_values[j][h])}}}},updateGradient:function(){var k;for(var j in this.rgb_values){if(this.rgb_values.hasOwnProperty(j)){for(k=0;k<3;k ){this.rgb_values[j][k] =this.rgb_steps[j][k]}}}var l="rgb(" (this.rgb_values.start[0]|0) "," (this.rgb_values.start[1]|0) "," (this.rgb_values.start[2]|0) ")";var h="rgb(" (this.rgb_values.stop[0]|0) "," (this.rgb_values.stop[1]|0) "," (this.rgb_values.stop[2]|0) ")";if(l!=this.color1||h!=this.color2){this.color1=l;this.color2=h;e(this.element).css("background-image","-webkit-gradient(linear, left bottom, right top, from(" this.color1 "), to(" this.color2 "))");for(k=0;k<4;k ){e(this.element).css("background-image",this.prefixes[k] "linear-gradient(" this.settings.angle ", " this.color1 ", " this.color2 ")")}}this.steps_count ;if(this.steps_count>this.steps_total){this.steps_count=0;this.currentIndex=this.setNext(this.currentIndex);this.nextIndex=this.setNext(this.nextIndex);this.calculateSteps()}}});e.fn[d]=function(h){return this.each(function(){if(!e.data(this,"plugin_" d)){e.data(this,"plugin_" d,new b(this,h))}})}})(jQuery,window,document);
$(document).ready(function() {
$("body").gradientify({
gradients: [
{ start: [49,76,172], stop: [242,159,191] },
{ start: [255,103,69], stop: [240,154,241] },
{ start: [33,229,241], stop: [235,236,117] }
]
});
});本文共 97 个字数,平均阅读时长 ≈ 1分钟
