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jquery网页下雪特效插件实例
年底为了体现过年的气氛,很多网页会做各种喜气的特效,现在我们来学习一下jquery网页下雪特效插件,这样你的网页也可以有冬天的年味了。
又到了年底,从圣诞节开始,可以发现各大网站的活动是越来越多,都变的银装素裹,本人由于业务需求也需要做这么一个效果,所以就通过google大神找了一下相关资源,结果就出现了N种雪花效果的方式。种类繁多,最后找到了本文看到的这种效果,原作者写的可以说已经满足了我的需求,但是为了符合更多的场景,又再原作者的基础上做了调整。
声明:本文核心代码归原作者@Ivan Lazarevic(https://github.com/kopipejst)所有,本人只增加了一些参数和效果
兼容性:除IE外各主流浏览器(当然也可以调整代码,支持IE高版本浏览器,本文实例不支持IE)
经过调整的代码如下,上半部分为jquery-easing,下半部分为雪花效果.
- (function($){
- /*
- * jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/
- *
- * Uses the built in easing capabilities added In jQuery 1.1
- * to offer multiple easing options
- *
- * TERMS OF USE - jQuery Easing
- *
- * Open source under the BSD License.
- *
- * Copyright © 2008 George McGinley Smith
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this list of
- * conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright notice, this list
- * of conditions and the following disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * Neither the name of the author nor the names of contributors may be used to endorse
- * or promote products derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
- // t: current time, b: begInnIng value, c: change In value, d: duration
- jQuery.easing['jswing'] = jQuery.easing['swing'];
- jQuery.extend( jQuery.easing,
- {
- def: 'easeOutQuad',
- swing: function (x, t, b, c, d) {
- //alert(jQuery.easing.default);
- return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
- },
- easeInQuad: function (x, t, b, c, d) {
- return c*(t/=d)*t + b;
- },
- easeOutQuad: function (x, t, b, c, d) {
- return -c *(t/=d)*(t-2) + b;
- },
- easeInOutQuad: function (x, t, b, c, d) {
- if ((t/=d/2) < 1) return c/2*t*t + b;
- return -c/2 * ((--t)*(t-2) - 1) + b;
- },
- easeInCubic: function (x, t, b, c, d) {
- return c*(t/=d)*t*t + b;
- },
- easeOutCubic: function (x, t, b, c, d) {
- return c*((t=t/d-1)*t*t + 1) + b;
- },
- easeInOutCubic: function (x, t, b, c, d) {
- if ((t/=d/2) < 1) return c/2*t*t*t + b;
- return c/2*((t-=2)*t*t + 2) + b;
- },
- easeInQuart: function (x, t, b, c, d) {
- return c*(t/=d)*t*t*t + b;
- },
- easeOutQuart: function (x, t, b, c, d) {
- return -c * ((t=t/d-1)*t*t*t - 1) + b;
- },
- easeInOutQuart: function (x, t, b, c, d) {
- if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
- return -c/2 * ((t-=2)*t*t*t - 2) + b;
- },
- easeInQuint: function (x, t, b, c, d) {
- return c*(t/=d)*t*t*t*t + b;
- },
- easeOutQuint: function (x, t, b, c, d) {
- return c*((t=t/d-1)*t*t*t*t + 1) + b;
- },
- easeInOutQuint: function (x, t, b, c, d) {
- if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
- return c/2*((t-=2)*t*t*t*t + 2) + b;
- },
- easeInSine: function (x, t, b, c, d) {
- return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
- },
- easeOutSine: function (x, t, b, c, d) {
- return c * Math.sin(t/d * (Math.PI/2)) + b;
- },
- easeInOutSine: function (x, t, b, c, d) {
- return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
- },
- easeInExpo: function (x, t, b, c, d) {
- return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
- },
- easeOutExpo: function (x, t, b, c, d) {
- return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
- },
- easeInOutExpo: function (x, t, b, c, d) {
- if (t==0) return b;
- if (t==d) return b+c;
- if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
- return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
- },
- easeInCirc: function (x, t, b, c, d) {
- return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
- },
- easeOutCirc: function (x, t, b, c, d) {
- return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
- },
- easeInOutCirc: function (x, t, b, c, d) {
- if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
- return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
- },
- easeInElastic: function (x, t, b, c, d) {
- var s=1.70158;var p=0;var a=c;
- if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
- if (a < Math.abs(c)) { a=c; var s=p/4; }
- else var s = p/(2*Math.PI) * Math.asin (c/a);
- return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
- },
- easeOutElastic: function (x, t, b, c, d) {
- var s=1.70158;var p=0;var a=c;
- if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
- if (a < Math.abs(c)) { a=c; var s=p/4; }
- else var s = p/(2*Math.PI) * Math.asin (c/a);
- return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
- },
- easeInOutElastic: function (x, t, b, c, d) {
- var s=1.70158;var p=0;var a=c;
- if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5);
- if (a < Math.abs(c)) { a=c; var s=p/4; }
- else var s = p/(2*Math.PI) * Math.asin (c/a);
- if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
- return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
- },
- easeInBack: function (x, t, b, c, d, s) {
- if (s == undefined) s = 1.70158;
- return c*(t/=d)*t*((s+1)*t - s) + b;
- },
- easeOutBack: function (x, t, b, c, d, s) {
- if (s == undefined) s = 1.70158;
- return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
- },
- easeInOutBack: function (x, t, b, c, d, s) {
- if (s == undefined) s = 1.70158;
- if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
- return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
- },
- easeInBounce: function (x, t, b, c, d) {
- return c - jQuery.easing.easeOutBounce (x, d-t, 0, c, d) + b;
- },
- easeOutBounce: function (x, t, b, c, d) {
- if ((t/=d) < (1/2.75)) {
- return c*(7.5625*t*t) + b;
- } else if (t < (2/2.75)) {
- return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
- } else if (t < (2.5/2.75)) {
- return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
- } else {
- return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
- }
- },
- easeInOutBounce: function (x, t, b, c, d) {
- if (t < d/2) return jQuery.easing.easeInBounce (x, t*2, 0, c, d) * .5 + b;
- return jQuery.easing.easeOutBounce (x, t*2-d, 0, c, d) * .5 + c*.5 + b;
- }
- });
- /*
- *
- * TERMS OF USE - EASING EQUATIONS
- *
- * Open source under the BSD License.
- *
- * Copyright © 2001 Robert Penner
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this list of
- * conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright notice, this list
- * of conditions and the following disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * Neither the name of the author nor the names of contributors may be used to endorse
- * or promote products derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
- $.fn.snow = function(options){
- //处理浏览器
- var na = window.navigator;
- var ua = na.userAgent.toLowerCase();
- var browserTester = /(webkit|gecko|presto|opera|safari|firefox|chrome|applewebkit)[ /os]*([d_.]+)/ig
- if(!browserTester.test(ua)) {
- return;
- }
- var winHeight = $(window).height();
- var docHeight = $(document).height();
- var docWidth = $(document).width();
- var defaults = {
- minSize: 20, //雪花的最小尺寸
- maxSize: 50, //雪花的最大尺寸
- speed: docHeight * 10, //雪花掉落速度
- frequency: 500, //雪花出现的频率
- color: "#FFFFFF", //雪花颜色
- easing: 'linear', //雪花动画效果
- position: 'absolute' //定位方式
- };
- var options = $.extend({}, defaults, options);
- var $snow = $('<div>').css({'position': options.position, 'top': '-50px', 'z-index':9999999999}).html('❄');
- var height = options.position == "fixed" ? winHeight : docHeight;
- var width = docWidth;
- $('body').css('overflow-x', 'hidden');
- var interval = setInterval( function(){
- var startPositionLeft = Math.random() * width - 100;
- var startOpacity = 0.5 + Math.random();
- var size = options.minSize + Math.random() * options.maxSize;
- var endPositionTop = height - 40;
- var endPositionLeft = startPositionLeft + (Math.random()*10 > 5 ? -500 : 500);
- $snow.clone().appendTo('body').css({
- left: startPositionLeft,
- opacity: startOpacity,
- 'font-size': size,
- color: options.color
- }).animate({
- top: endPositionTop,
- left: endPositionLeft,
- opacity: 0.2
- },options.speed, options.easing,function(){
- $(this).remove()
- }
- );
- }, options.frequency);
- };
- })(jQuery);
调整点有:
增加speed参数,指的是每个雪花的生命周期时长
增加frequency参数,指的是每个雪花之间的间隔时长
增加easing参数,支持jquery-easing插件的所有动画,定义每个雪花的动画
增加position参数,支持雪花随屏幕下落