Corange Loading Screen

corange-loading-screen.markdown

Corange Loading Screen

A Pen by anthony rivera on CodePen.

License.

index.html

<div id="page">
  <div id="phrase_box">
  <svg width="100%" height="100%">
    <defs>
      <!--<style type="text/css">
        @font-face {
          font-family: "Proxima";
          src: url('');
        }
      </style>-->
      <mask id="mask" maskUnits="userSpaceOnUse" maskContentUnits="userSpaceOnUse">
        <linearGradient id="linearGradient" gradientUnits="objectBoundingBox" x2="0" y2="1">
          <stop stop-color="white" stop-opacity="0" offset="0%"/>
          <stop stop-color="white" stop-opacity="1" offset="30%"/>
          <stop stop-color="white" stop-opacity="1" offset="70%"/>
          <stop stop-color="white" stop-opacity="0" offset="100%"/>
        </linearGradient>
        <rect width="100%" height="100%" fill="url(#linearGradient)"/>
      </mask>
    </defs>
    <g width="100%" height="100%" style="mask: url(#mask);">
      <g id="phrases"></g>
    </g>
  </svg>
  </div>
  <div id="footer">
    <div id="logo"></div>Company
  </div>
</div>

script.js

var checkmarkIdPrefix = "loadingCheckSVG-";
var checkmarkCircleIdPrefix = "loadingCheckCircleSVG-";
var verticalSpacing = 50;

function shuffleArray(array) {
    for (var i = array.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var temp = array[i];
        array[i] = array[j];
        array[j] = temp;
    }
    return array;
}

function createSVG(tag, properties, opt_children) {
  var newElement = document.createElementNS("http://www.w3.org/2000/svg", tag);
  for(prop in properties) {
    newElement.setAttribute(prop, properties[prop]);
  }
  if (opt_children) {
    opt_children.forEach(function(child) {
      newElement.appendChild(child);
    })
  }
  return newElement;
}

function createPhraseSvg(phrase, yOffset) {
  var text = createSVG("text", {
    fill: "white",
    x: 50,
    y: yOffset,
    "font-size": 18,
    "font-family": "Arial"
  });
  text.appendChild(document.createTextNode(phrase + "..."));
  return text;
}
function createCheckSvg(yOffset, index) {
  var check = createSVG("polygon", {
    points: "21.661,7.643 13.396,19.328 9.429,15.361 7.075,17.714 13.745,24.384 24.345,9.708 ",
    fill: "rgba(255,255,255,1)",
    id: checkmarkIdPrefix + index
  });
  var circle_outline = createSVG("path", {
    d: "M16,0C7.163,0,0,7.163,0,16s7.163,16,16,16s16-7.163,16-16S24.837,0,16,0z M16,30C8.28,30,2,23.72,2,16C2,8.28,8.28,2,16,2 c7.72,0,14,6.28,14,14C30,23.72,23.72,30,16,30z",
    fill: "white"
  })
  var circle = createSVG("circle", {
    id: checkmarkCircleIdPrefix + index,
    fill: "rgba(255,255,255,0)",
    cx: 16,
    cy: 16,
    r: 15
  })
  var group = createSVG("g", {
    transform: "translate(10 " + (yOffset - 20) + ") scale(.9)"
  }, [circle, check, circle_outline]);
  return group;
}

function addPhrasesToDocument(phrases) {
  phrases.forEach(function(phrase, index) {
    var yOffset = 30 + verticalSpacing * index;
    document.getElementById("phrases").appendChild(createPhraseSvg(phrase, yOffset));
    document.getElementById("phrases").appendChild(createCheckSvg(yOffset, index));
  });
}

function easeInOut(t) {
  var period = 200;
  return (Math.sin(t / period + 100) + 1) /2;
}

document.addEventListener("DOMContentLoaded", function(event) {
  var phrases = shuffleArray(["Feeding unicorns", "Grabbing tasks", "Collating conversations", "Reticulating splines", "Pondering emptiness", "Considering alternatives", "Shuffling bits", "Celebrating moments", "Generating phrases", "Simulating workflow", "Empowering humanity", "Being aspirational", "Doing the hokey pokey", "Bueller", "Cracking jokes", "Slacking off"]);
  addPhrasesToDocument(phrases);
  var start_time = new Date().getTime();
  var upward_moving_group = document.getElementById("phrases");
  upward_moving_group.currentY = 0;
  var checks = phrases.map(function(_, i) { 
    return {check: document.getElementById(checkmarkIdPrefix + i), circle: document.getElementById(checkmarkCircleIdPrefix + i)};
  });
  function animateLoading() {
    var now = new Date().getTime();
    upward_moving_group.setAttribute("transform", "translate(0 " + upward_moving_group.currentY + ")");
    upward_moving_group.currentY -= 1.35 * easeInOut(now);
    checks.forEach(function(check, i) {
      var color_change_boundary = - i * verticalSpacing + verticalSpacing + 15;
      if (upward_moving_group.currentY < color_change_boundary) {
        var alpha = Math.max(Math.min(1 - (upward_moving_group.currentY - color_change_boundary + 15)/30, 1), 0);
        check.circle.setAttribute("fill", "rgba(255, 255, 255, " + alpha + ")");
        var check_color = [Math.round(255 * (1-alpha) + 120 * alpha), Math.round(255 * (1-alpha) + 154 * alpha)];
        check.check.setAttribute("fill", "rgba(255, " + check_color[0] + "," + check_color[1] + ", 1)");
      }
    })
    if (now - start_time < 30000 && upward_moving_group.currentY > -710) {
      requestAnimationFrame(animateLoading);
    }
  }
  //animateLoading();
});

style.scss

$gold: #FFB900;
$coral: #FC636B;
$brightCoral: #FF6D92;

#page {
  $opacity: 90%;
  align-items: center;
  background: linear-gradient(
                  to top right,
                  mix($coral, white, $opacity) 10%,
                  mix($brightCoral, white, $opacity) 65%,
                  mix($gold, white, $opacity) 125%);
  bottom: 0;
  display: flex;
  justify-content: center;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
  transition: opacity 1s;
}


#phrase_box {  
  display: flex;
  flex-flow: column;
  height: 150px;
  overflow: hidden;
  width: 260px;
}

#phrases {
  animation: slide-phrases-upward 20s;
}

#footer {
  bottom: 30px;
  color: white;
  display: flex;
  justify-content: center;
  left: 0;
  position: fixed;
  right: 0;
}

@keyframes slide-phrases-upward {
  @for $i from 0 through 20 {
    #{$i * 5%} {
      transform: translateY($i * -50px);
    }
  }
}

@for $i from 0 through 20 {
  #loadingCheckCircleSVG-#{$i} {
    animation: fill-to-white 5000ms;
    animation-delay: ($i - 1.5) * 1s;
    fill: white;
    opacity: 0;
  }
}
@keyframes fill-to-white {
  0% {
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@for $i from 0 through 20 {
  #loadingCheckSVG-#{$i} {
    animation: fill-to-coral 5000ms;
    animation-delay: ($i - 1.5) * 1s;    
  }
}
@keyframes fill-to-coral {
  0% {
    fill: white;
  }
  10% {
    fill: $brightCoral;
  }
  100% {
    fill: $brightCoral;
  }
}