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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <!-- include a single button, to be absolute positioned in the center of the viewport
the columns of different colors are added through the script
-->
<button>
  🌈 Sort <span>🌈</span>
</button>
            
          
!
            
              @import url("https://fonts.googleapis.com/css?family=Luckiest+Guy");

* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
/* specify the width and height of the body to encompass the viewport */
body {
  width: 100vw;
  height: 100vh;
  /* include a grid whose items are automatically added as column and occupy a fraction of the width */
  display: grid;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
}

/* absolute position the button in the center of teh viewport */
button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 0.6rem 1.25rem;
  background: hsl(0, 0%, 100%);
  border: none;
  border-radius: 10px;
  box-shadow: 0 2px 5px hsla(0, 0%, 0%, 0.3);
  color: #1c2d4a;
  text-transform: uppercase;
  font-family: "Luckiest Guy", cursive;
  font-size: 2rem;
  letter-spacing: 0.3rem;
  /* transition for the transform and box-shadow properties */
  transition: all 0.3s ease-out;
}
/* on hover slightly elevate the button */
button:hover {
  transform: translate(-50%, calc(-50% - 2px));
  box-shadow: 0 2px 7px hsla(0, 0%, 0%, 0.4);
}
/* when a class of .clicked is added (through the script) animate the button out of sight */
button.clicked {
  animation: clicked 0.8s cubic-bezier(0.13, 1.03, 0.72, 1.32) forwards;
}

/* animation to have the button pushed downward and then disappear as it returns to its original location */
@keyframes clicked {
  10%,
  35% {
    transform: translate(-50%, calc(-50% + 8px)) scaleY(0.95);
    box-shadow: 0 1px 5px hsla(0, 0%, 0%, 0.2);
    opacity: 1;
    visibility: visible;
  }
  80%,
  100% {
    opacity: 0;
    visibility: hidden;
  }
}


button span {
  display: inline-block;
  transform: rotateY(180deg);
}
            
          
!
            
              /*
variables tweaking the design

- numberOfColumns: the number of columns to be included in the viewport
  ! the value is capped to 360 to have at most one color for each hue in the [0-360] color wheel
- duration: the number of seconds it takes to complete the bubble sort
  ! this does not account for the animation of the button, but the animation of the columns only

- lightness and saturation: default values for the hsl color
*/
const numberOfColumns = 359;
const duration = 7.5;
const saturation = 70;
const lightness = 70;

// array describing the hues of the different columns, to avoid doubles
const hues = [];
// function returning a random hue, which is not already in the hues array
const uniqueHue = () => {
  const hue = Math.floor(Math.random() * 360);
  // if the hue is already present re-run the function
  if (hues.includes(hue)) {
    return uniqueHue();
  }
  // else add the hue to the array and return its value
  hues.push(hue);
  return hue;
};

// select the node in which to add the columns
const body = document.querySelector('body');

// in the body include as many div elements as specified by the columns variable
for (let i = 0; i < Math.min(numberOfColumns, 359); i += 1) {
  const columns = document.createElement('div');
  // with a unique hue
  const hue = uniqueHue();
  columns.style.background = `hsl(${hue}, ${saturation}%, ${lightness}%)`;
  // with a transition incrementally delayed for each successive column
  // ! ultimately this has the effect of swapping the columns one after the other
  columns.style.transition = `all 0.2s ${duration / numberOfColumns * i}s ease-out`;
  // add a data attribute to rapidly order the columns according to the hue value
  columns.setAttribute('data-hue', hue);
  body.appendChild(columns);
}

// target the button
const button = document.querySelector('button');

// function called to sort the items of an array according to data-hue attribute
function bubbleSort(arr) {
  // bubble sort algorithm
  // instead of swapping the items based on their values, swap them on the basis of the data-hue attribute
  for (let n = arr.length; n >= 0; n -= 1) {
    for (let i = 0; i < n - 1; i += 1) {
      const currentPosition = i;
      const nextPosition = i + 1;

      const current = arr[currentPosition];
      const next = arr[nextPosition];

      const currentHue = Number.parseInt(current.getAttribute('data-hue'), 10);
      const nextHue = Number.parseInt(next.getAttribute('data-hue'), 10);

      if (currentHue > nextHue) {
        [arr[currentPosition], arr[nextPosition]] = [arr[nextPosition], arr[currentPosition]];
      }
    }
  }
  return arr;
}

// function called when the button is pressed
function handleClick() {
  // add the class prompting the transition
  button.classList.add('clicked');
  // once the button's animation is complete
  button.addEventListener('animationend', () => {
    // target all the columns
    const columns = body.querySelectorAll('div');
    // sort an copy of the node list, converting it first to an array
    const sortedColumns = bubbleSort([...columns]);

    // loop through the sortedColumns array
    for (let i = 0; i < sortedColumns.length; i += 1) {
      // find the column in the unsorted data structure with the data-hue attribute matching the sorted value
      const sortedColumn = sortedColumns[i];
      const matchingColumn = [...columns].find(column => column.getAttribute('data-hue') === sortedColumn.getAttribute('data-hue'));
      // apply a property of order beginning with the smallest values, pushing the smaller hues to the beginning of the grid
      matchingColumn.style.order = i - sortedColumns.length;
    }
  });
}

// on click call the function prompting the sorting and the application of the order property according to the hue
button.addEventListener('click', handleClick);

            
          
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999px
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