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                <!DOCTYPE html>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />

    <script src=""></script>
    <script src=""></script>
    <script src=""></script>
    <script src=""></script>
      <div class="content">
        <div class="snap-images"></div>
        <button id="start-btn"> バイバイ!</button>
    var imageDataArray = [];
    var canvasCount = 35;
      html2canvas($(".content")[0]).then(canvas => {
        //capture all div data as image
        ctx = canvas.getContext("2d");
        var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
        var pixelArr =;
        //put pixel info to imageDataArray (Weighted Distributed)
        for (let i = 0; i < pixelArr.length; i+=4) {
          //find the highest probability canvas the pixel should be in
          let p = Math.floor((i/pixelArr.length) *canvasCount);
          let a = imageDataArray[weightedRandomDistrib(p)];
          a[i] = pixelArr[i];
          a[i+1] = pixelArr[i+1];
          a[i+2] = pixelArr[i+2];
          a[i+3] = pixelArr[i+3]; 
        //create canvas for each imageData and append to target element
        for (let i = 0; i < canvasCount; i++) {
          let c = newCanvasFromImageData(imageDataArray[i], canvas.width, canvas.height);
        //clear all children except the canvas
        //apply animation
        $(".dust").each( function(index){
          setTimeout(() => {
            animateTransform($(this),100,-100,chance.integer({ min: -15, max: 15 }),800+(110*index));
          }, 70*index); 
          //remove the canvas from DOM tree when faded
          $(this).delay(70*index).fadeOut((110*index)+800,"easeInQuint",()=> {$( this ).remove();});
    function weightedRandomDistrib(peak) {
      var prob = [], seq = [];
      for(let i=0;i<canvasCount;i++) {
      return chance.weighted(seq, prob);
    function animateBlur(elem,radius,duration) {
      var r =0;
      $({rad:0}).animate({rad:radius}, {
          duration: duration,
          easing: "easeOutQuad",
          step: function(now) {
                  filter: 'blur(' + now + 'px)'
    function animateTransform(elem,sx,sy,angle,duration) {
      var td = tx = ty =0;
      $({x: 0, y:0, deg:0}).animate({x: sx, y:sy, deg:angle}, {
          duration: duration,
          easing: "easeInQuad",
          step: function(now, fx) {
            if (fx.prop == "x") 
              tx = now;
            else if (fx.prop == "y") 
              ty = now;
            else if (fx.prop == "deg") 
              td = now;
                  transform: 'rotate(' + td + 'deg)' + 'translate(' + tx + 'px,'+ ty +'px)'
    function createBlankImageData(imageData) {
      for(let i=0;i<canvasCount;i++)
        let arr = new Uint8ClampedArray(;
        for (let j = 0; j < arr.length; j++) {
            arr[j] = 0;
    function newCanvasFromImageData(imageDataArray ,w , h) {
      var canvas = document.createElement('canvas');
          canvas.width = w;
          canvas.height = h;
          tempCtx = canvas.getContext("2d");
          tempCtx.putImageData(new ImageData(imageDataArray, w , h), 0, 0);
      return canvas;



                        * {
            box-sizing: border-box;
          body {
              margin: 0;
              min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background: #ddd;
          .content {
              display: flex;
              align-items: center;
            flex-direction: column;
            background: #ddd;
        content: "";
        background:url("")  #fff no-repeat;
        width: 400px;
        height: 400px;
        border-radius: 50%;
        #start-btn {
            font-size: 36px;
            padding: 20px 40px 20px 80px ;
            margin-top: 30px;
            border-radius: 10px;
            background:url("") #fff no-repeat;
          .dust {
              position: absolute;