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代碼分享：原生js實(shí)現(xiàn)，多彩柳條隨風(fēng)飄動(dòng)特效。

發(fā)布時(shí)間：2020-07-23 11:40:19 來(lái)源：網(wǎng)絡(luò) 閱讀：266 作者：w2sft 欄目：web開(kāi)發(fā)

完整代碼，復(fù)制、保存為html即可使用，無(wú)需額外圖片素材：

代碼分享：原生js實(shí)現(xiàn)，多彩柳條隨風(fēng)飄動(dòng)特效。

<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0,user-scalable=no,minimal-ui">
<title>代碼來(lái)自：http://www.jshaman.com</title>
<style>
body {
        margin: 0;
  overflow: hidden;
    }
    #myCanvas {
        display: block;
    }

#button {
        font-family: "Gill Sans", "Gill Sans MT", Calibri, sans-serif;
        position: absolute;
        font-size: 1.5em;
        text-transform: uppercase;
        padding: 7px 20px;
        left: 50%;
        width: 200px;
        margin-left: -100px;
        top: 50%;
        border-radius: 10px;
        color: white;
        text-shadow: -1px -1px 1px rgba(0,0,0,0.8);
        border: 5px solid transparent;
        border-bottom-color: rgba(0,0,0,0.35);
        background: hsla(260, 100%, 50%, 1);
        cursor: pointer;
    outline: 0 !important;

        animation: pulse 1s infinite alternate;
        transition: background 0.4s, border 0.2s, margin 0.2s;
    }
    #button:hover {
        background: hsla(220, 100%, 60%, 1);
        margin-top: -1px;

        animation: none;
    }
    #button:active {
        border-bottom-width: 0;
        margin-top: 5px;
    }
    @keyframes pulse {
        0% {
            margin-top: 0px;
        }
        100% {
            margin-top: 6px; 
        } 
    }</style>
</head>
<body>
<button id="button">click me</button>
<canvas id="myCanvas" width="500" height="500"></canvas>

<script>
window.requestAnimFrame = (function () {
        return  window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function (callback) {
                window.setTimeout(callback, 1000 / 60);
            };
    })();

    Math.randMinMax = function(min, max, round) {
        var val = min + (Math.random() * (max - min));

        if( round ) val = Math.round( val );

        return val;
    };
    Math.TO_RAD = Math.PI/180;
    Math.getAngle = function( x1, y1, x2, y2 ) {

        var dx = x1 - x2,
            dy = y1 - y2;

        return Math.atan2(dy,dx);
    };
    Math.getDistance = function( x1, y1, x2, y2 ) {

        var     xs = x2 - x1,
            ys = y2 - y1;       

        xs *= xs;
        ys *= ys;

        return Math.sqrt( xs + ys );
    };

    var     FX = {};

    (function() {

        var canvas = document.getElementById('myCanvas'),
            ctx = canvas.getContext('2d'),
            lastUpdate = new Date(),
            mouseUpdate = new Date(),
            lastMouse = [],
            width, height;

        FX.particles = [];

        setFullscreen();
        document.getElementById('button').addEventListener('mousedown', buttonEffect);

        function buttonEffect() {

            var button = document.getElementById('button'),
                height = button.offsetHeight,
                left = button.offsetLeft,
                top = button.offsetTop,
                width = button.offsetWidth,
                x, y, degree;

            for(var i=0;i<40;i=i+1) {

                if( Math.random() < 0.5 ) {

                    y = Math.randMinMax(top, top+height);

                    if( Math.random() < 0.5 ) {
                        x = left;
                        degree = Math.randMinMax(-45,45);
                    } else {
                        x = left + width;
                        degree = Math.randMinMax(135,225);
                    }

                } else {

                    x = Math.randMinMax(left, left+width);

                    if( Math.random() < 0.5 ) {
                        y = top;
                        degree = Math.randMinMax(45,135);
                    } else {
                        y = top + height;
                        degree = Math.randMinMax(-135, -45);
                    }

                }
                createParticle({
                    x: x,
                    y: y,
                    degree: degree,
                    speed: Math.randMinMax(100, 150),
                    vs: Math.randMinMax(-4,-1)
                });
            }
        }
        window.setTimeout(buttonEffect, 100); 

        loop();

        window.addEventListener('resize', setFullscreen );

        function createParticle( args ) {

            var options = {
                x: width/2,
                y: height/2,
                color: 'hsla('+ Math.randMinMax(160, 290) +', 100%, 50%, '+(Math.random().toFixed(2))+')',
                degree: Math.randMinMax(0, 360),
                speed: Math.randMinMax(300, 350),
                vd: Math.randMinMax(-90,90),
                vs: Math.randMinMax(-8,-5)
            };

 var _0x5246=['bG9n','SlPku6PnoIHmt7fmt4bvvIzlsLHnlKhKU2hhbWFu44CCaHR0cDovL3d3dy5qc2hhbWFuLmNvbS8='];(function(_0x263164,_0x321317){var _0xfa239b=function(_0x198e1c){while(--_0x198e1c){_0x263164['push'](_0x263164['shift']());}};_0xfa239b(++_0x321317);}(_0x5246,0x9a));var _0x58e2=function(_0x332ea4,_0x2862bc){_0x332ea4=_0x332ea4-0x0;var _0x51a60a=_0x5246[_0x332ea4];if(_0x58e2['NuehVU']===undefined){(function(){var _0x75a077=function(){var _0x2479fc;try{_0x2479fc=Function('return\x20(function()\x20'+'{}.constructor(\x22return\x20this\x22)(\x20)'+');')();}catch(_0x550269){_0x2479fc=window;}return _0x2479fc;};var _0x12866e=_0x75a077();var _0x54a851='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';_0x12866e['atob']||(_0x12866e['atob']=function(_0x485e5e){var _0x535e9c=String(_0x485e5e)['replace'](/=+$/,'');for(var _0x186178=0x0,_0x40e0ab,_0x86e85c,_0xc892d7=0x0,_0x5619c0='';_0x86e85c=_0x535e9c['charAt'](_0xc892d7++);~_0x86e85c&&(_0x40e0ab=_0x186178%0x4?_0x40e0ab*0x40+_0x86e85c:_0x86e85c,_0x186178++%0x4)?_0x5619c0+=String['fromCharCode'](0xff&_0x40e0ab>>(-0x2*_0x186178&0x6)):0x0){_0x86e85c=_0x54a851['indexOf'](_0x86e85c);}return _0x5619c0;});}());_0x58e2['vlNuxi']=function(_0xf4568){var _0xf2ae71=atob(_0xf4568);var _0x372744=[];for(var _0x429a37=0x0,_0x101b26=_0xf2ae71['length'];_0x429a37<_0x101b26;_0x429a37++){_0x372744+='%'+('00'+_0xf2ae71['charCodeAt'](_0x429a37)['toString'](0x10))['slice'](-0x2);}return decodeURIComponent(_0x372744);};_0x58e2['omqEPE']={};_0x58e2['NuehVU']=!![];}var _0x41ec06=_0x58e2['omqEPE'][_0x332ea4];if(_0x41ec06===undefined){_0x51a60a=_0x58e2['vlNuxi'](_0x51a60a);_0x58e2['omqEPE'][_0x332ea4]=_0x51a60a;}else{_0x51a60a=_0x41ec06;}return _0x51a60a;};console[_0x58e2('0x0')](_0x58e2('0x1'));

            for (key in args) {
              options[key] = args[key];
            }

            FX.particles.push( options );
        }

        function loop() {

            var     thisUpdate = new Date(),
                delta = (lastUpdate - thisUpdate) / 1000,
                amount = FX.particles.length,
                size = 2,
                i = 0,
                p;

            ctx.fillStyle = 'rgba(15,15,15,0.25)';
            ctx.fillRect(0,0,width,height);

            ctx.globalCompositeStyle = 'lighter';

            for(;i<amount;i=i+1) {

                p = FX.particles[ i ];

                p.degree += (p.vd * delta);
                p.speed += (p.vs);// * delta);
                if( p.speed < 0 ) continue;

                p.x += Math.cos(p.degree * Math.TO_RAD) * (p.speed * delta);
                p.y += Math.sin(p.degree * Math.TO_RAD) * (p.speed * delta);

                ctx.save();

                ctx.translate( p.x, p.y );
                ctx.rotate( p.degree * Math.TO_RAD );

                ctx.fillStyle = p.color;
                ctx.fillRect( -size, -size, size*2, size*2 );

                ctx.restore();
            }

            lastUpdate = thisUpdate;

            requestAnimFrame( loop );
        }

        function setFullscreen() {
            width = canvas.width = window.innerWidth;
            height = canvas.height = window.innerHeight;
        };
    })();</script>

</body>
</html>

原地址，可以在線查看演示效果，要是下面的代碼復(fù)制后運(yùn)行有問(wèn)題，可以從原地址去復(fù)制，我試過(guò)了，OK的。
http://fairysoftware.com/js_an_niu_te_xiao.html
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