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CSS

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JavaScript

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HTML 

              
                <figure></figure>
<canvas id=eye-l width=800 height=668></canvas>
<canvas id=eye-r width=800 height=668></canvas>
<canvas id=mouth width=800 height=668></canvas>
!

CSS 

              
                $scale: 0.5;
$width: 800px * $scale;
$height: 668px * $scale;

figure {
  background-image: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/111863/ja-face-bg-full.png");
  background-size: contain;
  background-position: center;
  margin: 0;
}

figure,
canvas {
  width: $width;
  height: $height;
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
}

html,body {
  height: 100%;
}
body {
  background: #fff;
  overflow: hidden;
}
!

JS 

              
                var ja_face = new JAFace();

function JAFace() {
  var JAF = {};
  
  init();
  
  return JAF;
  
  function init() {
    loadGlobals();
    loadCanvases();
    var load_mouth = loadMouth();
    const promises = [loadMouth(), loadEyes()];
    Promise.all(promises).then(() => {
      resetEyes();
      frameUpdate();
    })
  } 
  
  function loadGlobals() {
    JAF.frames = 10;
    JAF.index = 0;
    JAF.direction = 'up';
  }
  
  function loadCanvases() {
    JAF.cvs_mouth = document.getElementById("mouth");
    JAF.ctx_mouth = JAF.cvs_mouth.getContext("2d");
    JAF.cvs_eye_l = document.getElementById("eye-l");
    JAF.ctx_eye_l = JAF.cvs_eye_l.getContext("2d");
    JAF.cvs_eye_r = document.getElementById("eye-r");
    JAF.ctx_eye_r = JAF.cvs_eye_r.getContext("2d");
    JAF.width = 800;
    JAF.height = 668;
  }
  
  function loadMouth() {
    JAF.images = {
      mouth: {},
      eyes: {}
    };
    
    return new Promise(function(res, rej) {
      var url = "//s3-us-west-2.amazonaws.com/s.cdpn.io/111863/",
          prefix = "ja-face-",
          file_type = "png",
          frames = JAF.frames,
          total_frames = frames,
          loaded = 0;

      for(var i = 0; i < frames; i++) {
        var mouth_file_name = url + prefix + "mouth-0" + i + "." + file_type;
        var mouth_img = new Image();
        mouth_img.setAttribute("data-mouth-index", i);
        JAF.images.mouth[i] = mouth_img;
        mouth_img.src = mouth_file_name;
        mouth_img.crossOrigin = "Anonymous";
        mouth_img.onload = function(e) {
          loaded++;
          if(loaded === total_frames) res(JAF.images);
        }
        mouth_img.onerror = function(e) {
          rej("cannot load images.");          
        };
      }
      
      // res(JAF.images);
    });
  }
        
  function loadEyes() {
    return new Promise(function(res, rej) {
      var url = "//s3-us-west-2.amazonaws.com/s.cdpn.io/111863/",
          prefix = "ja-face-",
          file_type = "png",
          eyes = "left right".split(" "),
          dirs = "up down left right".split(" "),
          frames = JAF.frames,
          total_frames = frames * eyes.length * dirs.length,
          loaded = 0;

      for(var i = 0; i < frames; i++) {    
        for(var e = 0; e < eyes.length; e++) {
          for(var d = 0; d < dirs.length; d++) {
            var name = eyes[e] + "_" + dirs[d];
            if(!JAF.images.eyes[name]) JAF.images.eyes[name] = {};
            var file_name = url + prefix + eyes[e] + "-eye-" + dirs[d] + "-0" + i + "." + file_type;
            var img = new Image();
            img.setAttribute("data-eye-type", name);
            img.setAttribute("data-eye-index", i);
            img.src = file_name;
            img.crossOrigin = "Anonymous";
            JAF.images.eyes[name][i] = img;            
            img.onload = function(e) {
              loaded++;
              if(loaded === total_frames) res(JAF.images);
            }
            
            img.onerror = function(e) {
              rej("cannot load images.");          
            };
          }
        }
      }
      
      //res(JAF.images);
      
    });
  }
  
  function frameUpdate() {
    drawParts();
    updateIndex();
    window.requestAnimationFrame(function() {
      frameUpdate();
    });
  }
  
  function drawImage(context, image, x, y) {
    if(image) {
      context.clearRect(0, 0, JAF.width, JAF.height);
      context.drawImage(image, x, y)
    }
  }
  
  function drawParts() {
    drawImage(JAF.ctx_mouth, JAF.images.mouth[JAF.index], JAF.width / 4, JAF.height / 2);
    if(JAF.left_eye)  drawImage(JAF.ctx_eye_l, JAF.left_eye[JAF.index], 200, 0);
    if(JAF.right_eye) drawImage(JAF.ctx_eye_r, JAF.right_eye[JAF.index], JAF.width / 2, 0);
  }
  
  function updateIndex() {
    if(JAF.direction === 'up') {
      if(JAF.index < JAF.frames - 1) { 
        JAF.index++;
      } else {
        JAF.direction = 'down';
        JAF.index--;
      }
    } else {
      if(JAF.index > 0) { 
        JAF.index--;
      } else {
        resetEyes();
        JAF.direction = 'up';
        JAF.index++;
      }
    }
  }
  
  function resetEyes() {
    var dirs = "left right up down".split(" ");
    JAF.left_eye = JAF.images.eyes["left_" + dirs[Math.floor(Math.random() * dirs.length)]];
    JAF.right_eye = JAF.images.eyes["right_" + dirs[Math.floor(Math.random() * dirs.length)]];
  }
}


// see stats on people that visit my profile?
// am i breaking internet?
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');

ga('create', 'UA-69440799-1', 'auto');
ga('send', 'pageview');
!
999px

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