时光荏苒，白驹过隙。

2022这一年又在忙碌中度过了，过去的一年，我们同努力，我们共欢笑，每一次成功都蕴藏着我们辛勤的劳动。

新的一年即将来到，我们不能停滞不前，一味只是骄傲。愿大家与时俱进，拼搏不懈，共创新的辉煌！

借着新年到来的喜庆，给大家分享一个新年烟花的前端代码，快拿着代码展示给你的朋友们看吧！！

转眼间已经到了2022的尾巴，这一年对于国家来说丰富充实,冬奥会在北京举行、中国共产党第二十次全国代表大会召开、社会共同抗击疫情的第三年、我国完成天宫空间站建造……对于我们每一个个体，2022也承载着我们的快乐与悲伤，它是无法替代的。

新的一年马上就要到了，让我们告别2022，迎接2023！

希望2023,全糖去冰。

二、跨年烟花

本文是一篇简单的前端代码，主要内容有html，JS，CSS等内容

1、HTML代码

2、JS代码

3、CSS样式

4、插件等

5、可根据需求自定义文字

6、背景音乐

7、倒计时

三、效果展示

文末有完整代码，只需要下载压缩包，解压运行即可。接下来我们一起来看看效果吧！！！

倒计时

2023

兔圆圆

包含背景音乐，自定义文字，倒计时等

四、编码实现

index.html

烟花，雪花，背景音乐，页面样式

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>时光荏苒，白驹过隙！</title>

    <style>
      html,
      body 
        margin: 0px;
        width: 100%;
        height: 100%;
        overflow: hidden;
        background: #000;
      
    </style>
  </head>
  <body>
    <canvas
      id="canvas"
      style="position: absolute; width: 100%; height: 100%; z-index: 8888"
    ></canvas>
    <canvas
      style="position: absolute; width: 100%; height: 100%; z-index: 9999"
      class="canvas"
    ></canvas>
    <div class="overlay">
      <div class="tabs">
        <div class="tabs-labels">
          <span class="tabs-label">Commands</span
          ><span class="tabs-label">Info</span
          ><span class="tabs-label">Share</span>
        </div>

        <div class="tabs-panels">
          <ul class="tabs-panel commands"></ul>
        </div>
      </div>
    </div>
    <script>
      function initVars() 
        pi = Math.PI;
        ctx = canvas.getContext("2d");
        canvas.width = canvas.clientWidth;
        canvas.height = canvas.clientHeight;
        cx = canvas.width / 2;
        cy = canvas.height / 2;
        playerZ = -25;
        playerX =
          playerY =
          playerVX =
          playerVY =
          playerVZ =
          pitch =
          yaw =
          pitchV =
          yawV =
            0;
        scale = 600;
        seedTimer = 0;
        (seedInterval = 5), (seedLife = 100);
        gravity = 0.02;
        seeds = new Array();
        sparkPics = new Array();
        s = "https://cantelope.org/NYE/";
        for (i = 1; i <= 10; ++i) 
          sparkPic = new Image();
          sparkPic.src = s + "spark" + i + ".png";
          sparkPics.push(sparkPic);
        
        sparks = new Array();
        pow1 = new Audio(s + "pow1.ogg");
        pow2 = new Audio(s + "pow2.ogg");
        pow3 = new Audio(s + "pow3.ogg");
        pow4 = new Audio(s + "pow4.ogg");
        frames = 0;
      

      function rasterizePoint(x, y, z) 
        var p, d;
        x -= playerX;
        y -= playerY;
        z -= playerZ;
        p = Math.atan2(x, z);
        d = Math.sqrt(x * x + z * z);
        x = Math.sin(p - yaw) * d;
        z = Math.cos(p - yaw) * d;
        p = Math.atan2(y, z);
        d = Math.sqrt(y * y + z * z);
        y = Math.sin(p - pitch) * d;
        z = Math.cos(p - pitch) * d;
        var rx1 = -1000,
          ry1 = 1,
          rx2 = 1000,
          ry2 = 1,
          rx3 = 0,
          ry3 = 0,
          rx4 = x,
          ry4 = z,
          uc = (ry4 - ry3) * (rx2 - rx1) - (rx4 - rx3) * (ry2 - ry1);
        if (!uc) return  x: 0, y: 0, d: -1 ;
        var ua = ((rx4 - rx3) * (ry1 - ry3) - (ry4 - ry3) * (rx1 - rx3)) / uc;
        var ub = ((rx2 - rx1) * (ry1 - ry3) - (ry2 - ry1) * (rx1 - rx3)) / uc;
        if (!z) z = 0.000000001;
        if (ua > 0 && ua < 1 && ub > 0 && ub < 1) 
          return 
            x: cx + (rx1 + ua * (rx2 - rx1)) * scale,
            y: cy + (y / z) * scale,
            d: Math.sqrt(x * x + y * y + z * z),
          ;
         else 
          return 
            x: cx + (rx1 + ua * (rx2 - rx1)) * scale,
            y: cy + (y / z) * scale,
            d: -1,
          ;
        
      

      function spawnSeed() 
        seed = new Object();
        seed.x = -50 + Math.random() * 100;
        seed.y = 25;
        seed.z = -50 + Math.random() * 100;
        seed.vx = 0.1 - Math.random() * 0.2;
        seed.vy = -1.5; //*(1+Math.random()/2);
        seed.vz = 0.1 - Math.random() * 0.2;
        seed.born = frames;
        seeds.push(seed);
      

      function splode(x, y, z) 
        t = 5 + parseInt(Math.random() * 150);
        sparkV = 1 + Math.random() * 2.5;
        type = parseInt(Math.random() * 3);
        switch (type) 
          case 0:
            pic1 = parseInt(Math.random() * 10);
            break;
          case 1:
            pic1 = parseInt(Math.random() * 10);
            do 
              pic2 = parseInt(Math.random() * 10);
             while (pic2 == pic1);
            break;
          case 2:
            pic1 = parseInt(Math.random() * 10);
            do 
              pic2 = parseInt(Math.random() * 10);
             while (pic2 == pic1);
            do 
              pic3 = parseInt(Math.random() * 10);
             while (pic3 == pic1 || pic3 == pic2);
            break;
        
        for (m = 1; m < t; ++m) 
          spark = new Object();
          spark.x = x;
          spark.y = y;
          spark.z = z;
          p1 = pi * 2 * Math.random();
          p2 = pi * Math.random();
          v = sparkV * (1 + Math.random() / 6);
          spark.vx = Math.sin(p1) * Math.sin(p2) * v;
          spark.vz = Math.cos(p1) * Math.sin(p2) * v;
          spark.vy = Math.cos(p2) * v;
          switch (type) 
            case 0:
              spark.img = sparkPics[pic1];
              break;
            case 1:
              spark.img = sparkPics[parseInt(Math.random() * 2) ? pic1 : pic2];
              break;
            case 2:
              switch (parseInt(Math.random() * 3)) 
                case 0:
                  spark.img = sparkPics[pic1];
                  break;
                case 1:
                  spark.img = sparkPics[pic2];
                  break;
                case 2:
                  spark.img = sparkPics[pic3];
                  break;
              
              break;
          
          spark.radius = 25 + Math.random() * 50;
          spark.alpha = 1;
          spark.trail = new Array();
          sparks.push(spark);
        
        switch (parseInt(Math.random() * 4)) 
          case 0:
            pow = new Audio(s + "pow1.ogg");
            break;
          case 1:
            pow = new Audio(s + "pow2.ogg");
            break;
          case 2:
            pow = new Audio(s + "pow3.ogg");
            break;
          case 3:
            pow = new Audio(s + "pow4.ogg");
            break;
        
        d = Math.sqrt(
          (x - playerX) * (x - playerX) +
            (y - playerY) * (y - playerY) +
            (z - playerZ) * (z - playerZ)
        );
        pow.volume = 1.5 / (1 + d / 10);
        pow.play();
      

      function doLogic() 
        if (seedTimer < frames) 
          seedTimer = frames + seedInterval * Math.random() * 10;
          spawnSeed();
        
        for (i = 0; i < seeds.length; ++i) 
          seeds[i].vy += gravity;
          seeds[i].x += seeds[i].vx;
          seeds[i].y += seeds[i].vy;
          seeds[i].z += seeds[i].vz;
          if (frames - seeds[i].born > seedLife) 
            splode(seeds[i].x, seeds[i].y, seeds[i].z);
            seeds.splice(i, 1);
          
        
        for (i = 0; i < sparks.length; ++i) 
          if (sparks[i].alpha > 0 && sparks[i].radius > 5) 
            sparks[i].alpha -= 0.01;
            sparks[i].radius /= 1.02;
            sparks[i].vy += gravity;
            point = new Object();
            point.x = sparks[i].x;
            point.y = sparks[i].y;
            point.z = sparks[i].z;
            if (sparks[i].trail.length) 
              x = sparks[i].trail[sparks[i].trail.length - 1].x;
              y = sparks[i].trail[sparks[i].trail.length - 1].y;
              z = sparks[i].trail[sparks[i].trail.length - 1].z;
              d =
                (point.x - x) * (point.x - x) +
                (point.y - y) * (point.y - y) +
                (point.z - z) * (point.z - z);
              if (d > 9) 
                sparks[i].trail.push(point);
              
             else 
              sparks[i].trail.push(point);
            
            if (sparks[i].trail.length > 5) sparks[i].trail.splice(0, 1);
            sparks[i].x += sparks[i].vx;
            sparks[i].y += sparks[i].vy;
            sparks[i].z += sparks[i].vz;
            sparks[i].vx /= 1.075;
            sparks[i].vy /= 1.075;
            sparks[i].vz /= 1.075;
           else 
            sparks.splice(i, 1);
          
        
        p = Math.atan2(playerX, playerZ);
        d = Math.sqrt(playerX * playerX + playerZ * playerZ);
        d += Math.sin(frames / 80) / 1.25;
        t = Math.sin(frames / 200) / 40;
        playerX = Math.sin(p + t) * d;
        playerZ = Math.cos(p + t) * d;
        yaw = pi + p + t;
      

      function rgb(col) 
        var r = parseInt((0.5 + Math.sin(col) * 0.5) * 16);
        var g = parseInt((0.5 + Math.cos(col) * 0.5) * 16);
        var b = parseInt((0.5 - Math.sin(col) * 0.5) * 16);
        return "#" + r.toString(16) + g.toString(16) + b.toString(16);
      

      function draw() 
        ctx.clearRect(0, 0, cx * 2, cy * 2);

        ctx.fillStyle = "#ff8";
        for (i = -100; i < 100; i += 3) 
          for (j = -100; j < 100; j += 4) 
            x = i;
            z = j;
            y = 25;
            point = rasterizePoint(x, y, z);
            if (point.d != -1) 
              size = 250 / (1 + point.d);
              d = Math.sqrt(x * x + z * z);
              a = 0.75 - Math.pow(d / 100, 6) * 0.75;
              if (a > 0) 
                ctx.globalAlpha = a;
                ctx.fillRect(
                  point.x - size / 2,
                  point.y - size / 2,
                  size,
                  size
                );
              
            
          
        
        ctx.globalAlpha = 1;
        for (i = 0; i < seeds.length; ++i) 
          point = rasterizePoint(seeds[i].x, seeds[i].y, seeds[i].z);
          if (point.d != -1) 
            size = 200 / (1 + point.d);
            ctx.fillRect(point.x - size / 2, point.y - size / 2, size, size);
          
        
        point1 = new Object();
        for (i = 0; i < sparks.length; ++i) 
          point = rasterizePoint(sparks[i].x, sparks[i].y, sparks[i].z);
          if (point.d != -1) 
            size = (sparks[i].radius * 200) / (1 + point.d);
            if (sparks[i].alpha < 0) sparks[i].alpha = 0;
            if (sparks[i].trail.length) 
              point1.x = point.x;
              point1.y = point.y;
              switch (sparks[i].img) 
                case sparkPics[0]:
                  ctx.strokeStyle = "#f84";
                  break;
                case sparkPics[1]:
                  ctx.strokeStyle = "#84f";
                  break;
                case sparkPics[2]:
                  ctx.strokeStyle = "#8ff";
                  break;
                case sparkPics[3]:
                  ctx.strokeStyle = "#fff";
                  break;
                case sparkPics[4]:
                  ctx.strokeStyle = "#4f8";
                  break;
                case sparkPics[5]:
                  ctx.strokeStyle = "#f44";
                  break;
                case sparkPics[6]:
                  ctx.strokeStyle = "#f84";
                  break;
                case sparkPics[7]:
                  ctx.strokeStyle = "#84f";
                  break;
                case sparkPics[8]:
                  ctx.strokeStyle = "#fff";
                  break;
                case sparkPics[9]:
                  ctx.strokeStyle = "#44f";
                  break;
              
              for (j = sparks[i].trail.length - 1; j >= 0; --j) 
                point2 = rasterizePoint(
                  sparks[i].trail[j].x,
                  sparks[i].trail[j].y,
                  sparks[i].trail[j].z
                );
                if (point2.d != -1) 
                  ctx.globalAlpha =
                    ((j / sparks[i].trail.length) * sparks[i].alpha) / 2;
                  ctx.beginPath();
                  ctx.moveTo(point1.x, point1.y);
                  ctx.lineWidth =
                    1 +
                    (sparks[i].radius * 10) /
                      (sparks[i].trail.length - j) /
                      (1 + point2.d);
                  ctx.lineTo(point2.x, point2.y);
                  ctx.stroke();
                  point1.x = point2.x;
                  point1.y = point2.y;
                
              
            
            ctx.globalAlpha = sparks[i].alpha;
            ctx.drawImage(
              sparks[i].img,
              point.x - size / 2,
              point.y - size / 2,
              size,
              size
            );
          
        
      

      function frame() 
        if (frames > 100000) 
          seedTimer = 0;
          frames = 0;
        
        frames++;
        draw();
        doLogic();
        requestAnimationFrame(frame);
      

      window.addEventListener("resize", () => 
        canvas.width = canvas.clientWidth;
        canvas.height = canvas.clientHeight;
        cx = canvas.width / 2;
        cy = canvas.height / 2;
      );

      initVars();
      frame();
    </script>
    <script src="js/index.js"></script>
    <div id="page_end_html">
      <!--放大图片-->
      <link
        rel="stylesheet"
        type="text/css"
        href="https://blog-static.cnblogs.com/files/zouwangblog/zoom.css"
      />
      <script src="https://cdn.bootcss.com/jquery/1.8.3/jquery.min.js"></script>
      <script src="https://cdn.bootcss.com/bootstrap/3.2.0/js/transition.js"></script>
      <script src="https://blog-static.cnblogs.com/files/zouwangblog/zoom.js"></script>
      <script type="text/javascript">
        $("#cnblogs_post_body img").attr("data-action", "zoom");
      </script>
      <!--放大图片end-->
    
      <!--鼠标特效-->
      <script src="https://blog-static.cnblogs.com/files/zouwangblog/mouse-click.js"></script>
      <canvas
        width="1777"
        height="841"
        style="
          position: fixed;
          left: 0px;
          top: 0px;
          z-index: 2147483647;
          pointer-events: none;
        "
      ></canvas>
      <!--鼠标特效 end-->
      <!-- require APlayer -->
      <link
        rel="stylesheet"
        href="https://cdn.jsdelivr.net/npm/aplayer/dist/APlayer.min.css"
      />
      <script src="https://cdn.jsdelivr.net/npm/aplayer/dist/APlayer.min.js"></script>
      <!-- require MetingJS -->
      <script src="https://cdn.jsdelivr.net/npm/meting@2/dist/Meting.min.js"></script>
    
      <!-- // 随机线条 -->
      <script>
        !(function () 
          function n(n, e, t) 
            return n.getAttribute(e) || t;
          
          function e(n) 
            return document.getElementsByTagName(n);
          
          function t() 
            var t = e("script"),
              o = t.length,
              i = t[o - 1];
            return 
              l: o,
              z: n(i, "zIndex", -1),
              o: n(i, "opacity", 0.6),
              c: n(i, "color", "148,0,211"),
              n: n(i, "count", 99),
            ;
          
          function o() 
            (a = m.width =
              window.innerWidth ||
              document.documentElement.clientWidth ||
              document.body.clientWidth),
              (c = m.height =
                window.innerHeight ||
                document.documentElement.clientHeight ||
                document.body.clientHeight);
          
          function i() 
            r.clearRect(0, 0, a, c);
            var n, e, t, o, m, l;
            s.forEach(function (i, x) 
              for (
                i.x += i.xa,
                  i.y += i.ya,
                  i.xa *= i.x > a || i.x < 0 ? -1 : 1,
                  i.ya *= i.y > c || i.y < 0 ? -1 : 1,
                  r.fillRect(i.x - 0.5, i.y - 0.5, 1, 1),
                  e = x + 1;
                e < u.length;
                e++
              )
                (n = u[e]),
                  null !== n.x &&
                    null !== n.y &&
                    ((o = i.x - n.x),
                    (m = i.y - n.y),
                    (l = o * o + m * m),
                    l < n.max &&
                      (n === y &&
                        l >= n.max / 2 &&
                        ((i.x -= 0.03 * o), (i.y -= 0.03 * m)),
                      (t = (n.max - l) / n.max),
                      r.beginPath(),
                      (r.lineWidth = t / 2),
                      (r.strokeStyle = "rgba(" + d.c + "," + (t + 0.2) + ")"),
                      r.moveTo(i.x, i.y),
                      r.lineTo(n.x, n.y),
                      r.stroke()));
            ),
              x(i);
          
          var a,
            c,
            u,
            m = document.createElement("canvas"),
            d = t(),
            l = "c_n" + d.l,
            r = m.getContext("2d"),
            x =
              window.requestAnimationFrame ||
              window.webkitRequestAnimationFrame ||
              window.mozRequestAnimationFrame ||
              window.oRequestAnimationFrame ||
              window.msRequestAnimationFrame ||
              function (n) 
                window.setTimeout(n, 1e3 / 45);
              ,
            w = Math.random,
            y =  x: null, y: null, max: 2e4 ;
          (m.id = l),
            (m.style.cssText =
              "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o),
            e("body")[0].appendChild(m),
            o(),
            (window.onresize = o),
            (window.onmousemove = function (n) 
              (n = n || window.event), (y.x = n.clientX), (y.y = n.clientY);
            ),
            (window.onmouseout = function () 
              (y.x = null), (y.y = null);
            );
          for (var s = [], f = 0; d.n > f; f++) 
            var h = w() * a,
              g = w() * c,
              v = 2 * w() - 1,
              p = 2 * w() - 1;
            s.push( x: h, y: g, xa: v, ya: p, max: 6e3 );
          
          (u = s.concat([y])),
            setTimeout(function () 
              i();
            , 100);
        )();
      </script>
    
      <!-- 雪花特效 -->
      <script type="text/javascript">
        (function ($) 
          $.fn.snow = function (options) 
            var $flake = $('<div id="snowbox" />')
                .css( position: "absolute", "z-index": "9999", top: "-50px" )
                .html("❄"),
              documentHeight = $(document).height(),
              documentWidth = $(document).width(),
              defaults = 
                minSize: 10,
                maxSize: 20,
                newOn: 1000,
                flakeColor:
                  "#00CED1" /* 此处可以定义雪花颜色，若要白色可以改为#FFFFFF */,
              ,
              options = $.extend(, defaults, options);
            var interval = setInterval(function () 
              var startPositionLeft = Math.random() * documentWidth - 100,
                startOpacity = 0.5 + Math.random(),
                sizeFlake = options.minSize + Math.random() * options.maxSize,
                endPositionTop = documentHeight - 200,
                endPositionLeft = startPositionLeft - 500 + Math.random() * 500,
                durationFall = documentHeight * 10 + Math.random() * 5000;
              $flake
                .clone()
                .appendTo("body")
                .css(
                  left: startPositionLeft,
                  opacity: startOpacity,
                  "font-size": sizeFlake,
                  color: options.flakeColor,
                )
                .animate(
                  
                    top: endPositionTop,
                    left: endPositionLeft,
                    opacity: 0.2,
                  ,
                  durationFall,
                  "linear",
                  function () 
                    $(this).remove();
                  
                );
            , options.newOn);
          ;
        )(jQuery);
        $(function () 
          $.fn.snow(
            minSize: 5 /* 定义雪花最小尺寸 */,
            maxSize: 80 /* 定义雪花最大尺寸 */,
            newOn: 200 /* 定义密集程度，数字越小越密集 */,
          );
        );
      </script>
  </body>
</html>

index.js

自定义文字



var S = 
  init: function () 
    var action = window.location.href,
        i = action.indexOf('?a=');

    S.Drawing.init('.canvas');
    document.body.classList.add('body--ready');

    if (i !== -1) 
      S.UI.simulate(decodeURI(action).substring(i + 3));
     else 
      S.UI.simulate('|#countdown 3||2023|兔圆圆||#rectangle|');
      // S.UI.simulate('|写|尽|千|山|落|笔|是|你|#rectangle|');
    

    S.Drawing.loop(function () 
      S.Shape.render();
    );
  
;


S.Drawing = (function () 
  var canvas,
      context,
      renderFn
      requestFrame = window.requestAnimationFrame       ||
                     window.webkitRequestAnimationFrame ||
                     window.mozRequestAnimationFrame    ||
                     window.oRequestAnimationFrame      ||
                     window.msRequestAnimationFrame     ||
                     function(callback) 
                       window.setTimeout(callback, 1000 / 60);
                     ;

  return 
    init: function (el) 
      canvas = document.querySelector(el);
      context = canvas.getContext('2d');
      this.adjustCanvas();

      window.addEventListener('resize', function (e) 
        S.Drawing.adjustCanvas();
      );
    ,

    loop: function (fn) 
      renderFn = !renderFn ? fn : renderFn;
      this.clearFrame();
      renderFn();
      requestFrame.call(window, this.loop.bind(this));
    ,

    adjustCanvas: function () 
      canvas.width = window.innerWidth;
      canvas.height = window.innerHeight;
    ,

    clearFrame: function () 
      context.clearRect(0, 0, canvas.width, canvas.height);
    ,

    getArea: function () 
      return  w: canvas.width, h: canvas.height ;
    ,

    drawCircle: function (p, c) 
      context.fillStyle = c.render();
      context.beginPath();
      context.arc(p.x, p.y, p.z, 0, 2 * Math.PI, true);
      context.closePath();
      context.fill();
    
  
());


S.UI = (function () 
  var canvas = document.querySelector('.canvas'),
      interval,
      isTouch = false, //('ontouchstart' in window || navigator.msMaxTouchPoints),
      currentAction,
      resizeTimer,
      time,
      maxShapeSize = 30,
      firstAction = true,
      sequence = [],
      cmd = '#';

  function formatTime(date) 
    var h = date.getHours(),
        m = date.getMinutes(),
    m = m < 10 ? '0' + m : m;
    return h + ':' + m;
  

  function getValue(value) 
    return value && value.split(' ')[1];
  

  function getAction(value) 
    value = value && value.split(' ')[0];
    return value && value[0] === cmd && value.substring(1);
  

  function timedAction(fn, delay, max, reverse) 
    clearInterval(interval);
    currentAction = reverse ? max : 1;
    fn(currentAction);

    if (!max || (!reverse && currentAction < max) || (reverse && currentAction > 0)) 
      interval = setInterval(function () 
        currentAction = reverse ? currentAction - 1 : currentAction + 1;
        fn(currentAction);

        if ((!reverse && max && currentAction === max) || (reverse && currentAction === 0)) 
          clearInterval(interval);
        
      , delay);
    
  

  function reset(destroy) 
    clearInterval(interval);
    sequence = [];
    time = null;
    destroy && S.Shape.switchShape(S.ShapeBuilder.letter(''));
  

  function performAction(value) 
    var action,
        value,
        current;

    // overlay.classList.remove('overlay--visible');
    sequence = typeof(value) === 'object' ? value : sequence.concat(value.split('|'));
    // input.value = '';
    // checkInputWidth();

    timedAction(function (index) 
      current = sequence.shift();
      action = getAction(current);
      value = getValue(current);

      switch (action) 
        case 'countdown':
          value = parseInt(value) || 10;
          value = value > 0 ? value : 10;

          timedAction(function (index) 
            if (index === 0) 
              if (sequence.length === 0) 
                S.Shape.switchShape(S.ShapeBuilder.letter(''));
               else 
                performAction(sequence);
              
             else 
              S.Shape.switchShape(S.ShapeBuilder.letter(index), true);
            
          , 1000, value, true);
          break;

        case 'rectangle':
          value = value && value.split('x');
          value = (value && value.length === 2) ? value : [maxShapeSize, maxShapeSize / 2];

          S.Shape.switchShape(S.ShapeBuilder.rectangle(Math.min(maxShapeSize, parseInt(value[0])), Math.min(maxShapeSize, parseInt(value[1]))));
          break;

        case 'circle':
          value = parseInt(value) || maxShapeSize;
          value = Math.min(value, maxShapeSize);
          S.Shape.switchShape(S.ShapeBuilder.circle(value));
          break;

        case 'time':
          var t = formatTime(new Date());

          if (sequence.length > 0) 
            S.Shape.switchShape(S.ShapeBuilder.letter(t));
           else 
            timedAction(function () 
              t = formatTime(new Date());
              if (t !== time) 
                time = t;
                S.Shape.switchShape(S.ShapeBuilder.letter(time));
              
            , 1000);
          
          break;

        default:
          S.Shape.switchShape(S.ShapeBuilder.letter(current[0] === cmd ? 'What?' : current));
      
    , 2000, sequence.length);
  

  function checkInputWidth(e) 
    if (input.value.length > 18) 
      ui.classList.add('ui--wide');
     else 
      ui.classList.remove('ui--wide');
    

    if (firstAction && input.value.length > 0) 
      ui.classList.add('ui--enter');
     else 
      ui.classList.remove('ui--enter');
    
  

  function bindEvents() 
    document.body.addEventListener('keydown', function (e) 
      input.focus();

      if (e.keyCode === 13) 
        firstAction = false;
        reset();
        performAction(input.value);
      
    );

    canvas.addEventListener('click', function (e) 
      overlay.classList.remove('overlay--visible');
    );
  

  function init() 
    bindEvents();
    // input.focus();
    isTouch && document.body.classList.add('touch');
  

  // Init
  init();

  return 
    simulate: function (action) 
      performAction(action);
    
  
());


S.UI.Tabs = (function () 
  var tabs = document.querySelector('.tabs'),
      labels = document.querySelector('.tabs-labels'),
      triggers = document.querySelectorAll('.tabs-label'),
      panels = document.querySelectorAll('.tabs-panel');

  function activate(i) 
    triggers[i].classList.add('tabs-label--active');
    panels[i].classList.add('tabs-panel--active');
  

  function bindEvents() 
    labels.addEventListener('click', function (e) 
      var el = e.target,
          index;

      if (el.classList.contains('tabs-label')) 
        for (var t = 0; t < triggers.length; t++) 
          triggers[t].classList.remove('tabs-label--active');
          panels[t].classList.remove('tabs-panel--active');

          if (el === triggers[t]) 
            index = t;
          
        

        activate(index);
      
    );
  

  function init() 
    activate(0);
    bindEvents();
  

  // Init
  init();
());


S.Point = function (args) 
  this.x = args.x;
  this.y = args.y;
  this.z = args.z;
  this.a = args.a;
  this.h = args.h;
;


S.Color = function (r, g, b, a) 
  this.r = r;
  this.g = g;
  this.b = b;
  this.a = a;
;

S.Color.prototype = 
  render: function () 
    return 'rgba(' + this.r + ',' +  + this.g + ',' + this.b + ',' + this.a + ')';
  
;


S.Dot = function (x, y) 
  this.p = new S.Point(
    x: x,
    y: y,
    z: 5,
    a: 1,
    h: 0
  );

  this.e = 0.07;
  this.s = true;

  this.c = new S.Color(255, 255, 255, this.p.a);

  this.t = this.clone();
  this.q = [];
;

S.Dot.prototype = 
  clone: function () 
    return new S.Point(
      x: this.x,
      y: this.y,
      z: this.z,
      a: this.a,
      h: this.h
    );
  ,

  _draw: function () 
    this.c.a = this.p.a;
    S.Drawing.drawCircle(this.p, this.c);
  ,

  _moveTowards: function (n) 
    var details = this.distanceTo(n, true),
        dx = details[0],
        dy = details[1],
        d = details[2],
        e = this.e * d;

    if (this.p.h === -1) 
      this.p.x = n.x;
      this.p.y = n.y;
      return true;
    

    if (d > 1) 
      this.p.x -= ((dx / d) * e);
      this.p.y -= ((dy / d) * e);
     else 
      if (this.p.h > 0) 
        this.p.h--;
       else 
        return true;
      
    

    return false;
  ,

  _update: function () 
    if (this._moveTowards(this.t)) 
      var p = this.q.shift();

      if (p) 
        this.t.x = p.x || this.p.x;
        this.t.y = p.y || this.p.y;
        this.t.z = p.z || this.p.z;
        this.t.a = p.a || this.p.a;
        this.p.h = p.h || 0;
       else 
        if (this.s) 
          this.p.x -= Math.sin(Math.random() * 3.142);
          this.p.y -= Math.sin(Math.random() * 3.142);
         else 
          this.move(new S.Point(
            x: this.p.x + (Math.random() * 50) - 25,
            y: this.p.y + (Math.random() * 50) - 25,
          ));
        
      
    

    d = this.p.a - this.t.a;
    this.p.a = Math.max(0.1, this.p.a - (d * 0.05));
    d = this.p.z - this.t.z;
    this.p.z = Math.max(1, this.p.z - (d * 0.05));
  ,

  distanceTo: function (n, details) 
    var dx = this.p.x - n.x,
        dy = this.p.y - n.y,
        d = Math.sqrt(dx * dx + dy * dy);

    return details ? [dx, dy, d] : d;
  ,

  move: function (p, avoidStatic) 
    if (!avoidStatic || (avoidStatic && this.distanceTo(p) > 1)) 
      this.q.push(p);
    
  ,

  render: function () 
    this._update();
    this._draw();
  



S.ShapeBuilder = (function () 
  var gap = 13,
      shapeCanvas = document.createElement('canvas'),
      shapeContext = shapeCanvas.getContext('2d'),
      fontSize = 500,
      fontFamily = 'Avenir, Helvetica Neue, Helvetica, Arial, sans-serif';

  function fit() 
    shapeCanvas.width = Math.floor(window.innerWidth / gap) * gap;
    shapeCanvas.height = Math.floor(window.innerHeight / gap) * gap;
    shapeContext.fillStyle = 'red';
    shapeContext.textBaseline = 'middle';
    shapeContext.textAlign = 'center';
  

  function processCanvas() 
    var pixels = shapeContext.getImageData(0, 0, shapeCanvas.width, shapeCanvas.height).data;
        dots = [],
        pixels,
        x = 0,
        y = 0,
        fx = shapeCanvas.width,
        fy = shapeCanvas.height,
        w = 0,
        h = 0;

    for (var p = 0; p < pixels.length; p += (4 * gap)) 
      if (pixels[p + 3] > 0) 
        dots.push(new S.Point(
          x: x,
          y: y
        ));

        w = x > w ? x : w;
        h = y > h ? y : h;
        fx = x < fx ? x : fx;
        fy = y < fy ? y : fy;
      

      x += gap;

      if (x >= shapeCanvas.width) 
        x = 0;
        y += gap;
        p += gap * 4 * shapeCanvas.width;
      
    

    return  dots: dots, w: w + fx, h: h + fy ;
  

  function setFontSize(s) 
    shapeContext.font = 'bold ' + s + 'px ' + fontFamily;
  

  function isNumber(n) 
    return !isNaN(parseFloat(n)) && isFinite(n);
  

  function init() 
    fit();
    window.addEventListener('resize', fit);
  

  // Init
  init();

  return 
    imageFile: function (url, callback) 
      var image = new Image(),
          a = S.Drawing.getArea();

      image.onload = function () 
        shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
        shapeContext.drawImage(this, 0, 0, a.h * 0.6, a.h * 0.6);
        callback(processCanvas());
      ;

      image.onerror = function () 
        callback(S.ShapeBuilder.letter('What?'));
      

      image.src = url;
    ,

    circle: function (d) 
      var r = Math.max(0, d) / 2;
      shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
      shapeContext.beginPath();
      shapeContext.arc(r * gap, r * gap, r * gap, 0, 2 * Math.PI, false);
      shapeContext.fill();
      shapeContext.closePath();

      return processCanvas();
    ,

    letter: function (l) 
      var s = 0;

      setFontSize(fontSize);
      s = Math.min(fontSize,
                  (shapeCanvas.width / shapeContext.measureText(l).width) * 0.8 * fontSize,
                  (shapeCanvas.height / fontSize) * (isNumber(l) ? 1 : 0.45) * fontSize);
      setFontSize(s);

      shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height);
      shapeContext.fillText(l, shapeCanvas.width / 2, shapeCanvas.height / 2);

      return processCanvas();
    ,

    rectangle: function (w, h) 
      var dots = [],
          width = gap * w,
          height = gap * h;

      for (var y = 0; y < height; y += gap) 
        for (var x = 0; x < width; x += gap) 
          dots.push(new S.Point(
            x: x,
            y: y,
          ));
        
      

      return  dots: dots, w: width, h: height ;
    
  ;
());


S.Shape = (function () 
  var dots = [],
      width = 0,
      height = 0,
      cx = 0,
      cy = 0;

  function compensate() 
    var a = S.Drawing.getArea();

    cx = a.w / 2 - width / 2;
    cy = a.h / 2 - height / 2;
  

  return 
    shuffleIdle: function () 
      var a = S.Drawing.getArea();

      for (var d = 0; d < dots.length; d++) 
        if (!dots[d].s) 
          dots[d].move(
            x: Math.random() * a.w,
            y: Math.random() * a.h
          );
        
      
    ,

    switchShape: function (n, fast) 
      var size,
          a = S.Drawing.getArea();

      width = n.w;
      height = n.h;

      compensate();

      if (n.dots.length > dots.length) 
        size = n.dots.length - dots.length;
        for (var d = 1; d <= size; d++) 
          dots.push(new S.Dot(a.w / 2, a.h / 2));
        
      

      var d = 0,
          i = 0;

      while (n.dots.length > 0) 
        i = Math.floor(Math.random() * n.dots.length);
        dots[d].e = fast ? 0.25 : (dots[d].s ? 0.14 : 0.11);

        if (dots[d].s) 
          dots[d].move(new S.Point(
            z: Math.random() * 20 + 10,
            a: Math.random(),
            h: 18
          ));
         else 
          dots[d].move(new S.Point(
            z: Math.random() * 5 + 5,
            h: fast ? 18 : 30
          ));
        

        dots[d].s = true;
        dots[d].move(new S.Point(
          x: n.dots[i].x + cx,
          y: n.dots[i].y + cy,
          a: 1,
          z: 5,
          h: 0
        ));

        n.dots = n.dots.slice(0, i).concat(n.dots.slice(i + 1));
        d++;
      

      for (var i = d; i < dots.length; i++) 
        if (dots[i].s) 
          dots[i].move(new S.Point(
            z: Math.random() * 20 + 10,
            a: Math.random(),
            h: 20
          ));

          dots[i].s = false;
          dots[i].e = 0.04;
          dots[i].move(new S.Point(
            x: Math.random() * a.w,
            y: Math.random() * a.h,
            a: 0.3, //.4
            z: Math.random() * 4,
            h: 0
          ));
        
      
    ,

    render: function () 
      for (var d = 0; d < dots.length; d++) 
        dots[d].render();
      
    
  
());


S.init();

以上就是我们跨年烟花的全部代码了，能否看懂呢？🐒

2023跨年代码（烟花+自定义文字+背景音乐+雪花+倒计时）-Actionscript文档类资源-CSDN文库https://download.csdn.net/download/m0_63244368/87346455