Single Div Accordion Breakdown: Keyboard

In this example below you will see how to do a Single Div Accordion Breakdown: Keyboard with some HTML / CSS and Javascript

Thumbnail
This awesome code was written by danwilson, you can see more from this user in the personal repository.
You can find the original code on Codepen.io
Copyright danwilson ©
  • HTML
  • CSS
  • JavaScript
    <div></div>

<a href="https://codepen.io/danwilson/pen/BRdJVZ" target="_blank">See the full accordion</a>

/*Downloaded from https://www.codeseek.co/danwilson/single-div-accordion-breakdown-keyboard-VbQXjj */
    /*keyboard side*/
div {
  background:
    var(--shine),
    var(--shine),
    var(--button-key1, var(--button)),
    var(--button-key2, var(--button)),
    var(--button-key3, var(--button)),
    var(--the-black-keys),
    var(--white-keys),
    var(--keyboard-base);
  background-repeat: no-repeat;
  
  background-position:
    80% 0,
    85% 0,
    var(--button-key-x) var(--button-key1-y),
    var(--button-key-x) var(--button-key2-y),
    var(--button-key-x) var(--button-key3-y),
    var(--black-keys-position),
    var(--white-keys-position),
    0 0;
  
  background-size:
    1px 100%,
    2px 100%,
    100%,
    100%,
    100%,
    var(--black-keys-size),
    var(--white-keys-size),
    100%;
  
  width: calc(var(--bellow-width) * .36);
  height: calc(var(--height) + 5vmin);
  border-radius: 4vmin 1vmin 1vmin 4vmin;
  border: 0vmin solid var(--color2);
  
  box-shadow: inset 1vmin 0px 0 1vmin rgba(235,235,239,.2);
  
  color: rgba(0,0,0,0);
  font-size: 4vmin;
}

div {
  --color1: hsl(196, 50%, 50%);
  --color1alt: hsl(196, 50%, 33%);
  --color1alta: hsl(196, 50%, 73%);
  --color2: hsl(356, 70%, 50%);
  --color2alt: hsl(356, 70%, 40%);
  --color2alta: hsl(356, 70%, 80%);
  --color3: hsl(33, 80%, 60%);
  --color3alt: hsl(43, 80%, 50%);
  --white: #eaeaef;
  --white-between: hsla(0,0%,0%,.2);
  --black: var(--color1alt);
  
  --height: 40vmin;
  --bellow-y: 1vmin;
  --bellow-y-less: 39vmin;
  --bellow-width: 50vmin;
  
  --button-dim: 1.4vmin;
  --button: radial-gradient(circle, var(--color1) var(--button-dim), transparent var(--button-dim));
  
  --button-key-x: 5.5vmin;
  --button-key1-y: -6vmin;
  --button-key2-y: 0vmin;
  --button-key3-y: 6vmin;
   
  --shine: linear-gradient(to bottom, transparent 11.5%, var(--color2) 11.5%, var(--color2) 29.5%, transparent 29.5%, transparent 70.5%, var(--color2) 70.5%, var(--color2) 88.5%, transparent 88.5%);
  
  --the-black-keys: 
    linear-gradient(
      to bottom,
      transparent 3.5%,
      var(--black1, var(--black)) 3.5%,
      var(--black1, var(--black)) 6.5%,
      transparent 6.5%,
      transparent 8.5%,
      var(--black2, var(--black)) 8.5%,
      var(--black2, var(--black)) 11.5%,
      transparent 11.5%,
      transparent 13.5%,
      var(--black3, var(--black)) 13.5%,
      var(--black3, var(--black)) 16.5%,
      transparent 16.5%,
      
      transparent 23.5%,
      var(--black4, var(--black)) 23.5%,
      var(--black4, var(--black)) 26.5%,
      transparent 26.5%,
      transparent 28.5%,
      var(--black5, var(--black)) 28.5%,
      var(--black5, var(--black)) 31.5%,
      transparent 31.5%,
      
      transparent 38.5%,
      var(--black6, var(--black)) 38.5%,
      var(--black6, var(--black)) 41.5%,
      transparent 41.5%,
      transparent 43.5%,
      var(--black7, var(--black)) 43.5%,
      var(--black7, var(--black)) 46.5%,
      transparent 46.5%,
      transparent 48.5%,
      var(--black8, var(--black)) 48.5%,
      var(--black8, var(--black)) 51.5%,
      transparent 51.5%,
      
      transparent 58.5%,
      var(--black9, var(--black)) 58.5%,
      var(--black9, var(--black)) 61.5%,
      transparent 61.5%,
      transparent 63.5%,
      var(--black10, var(--black)) 63.5%,
      var(--black10, var(--black)) 66.5%,
      transparent 66.5%,
      
      
      transparent 73.5%,
      var(--black11, var(--black)) 73.5%,
      var(--black11, var(--black)) 76.5%,
      transparent 76.5%,
      transparent 78.5%,
      var(--black12, var(--black)) 78.5%,
      var(--black12, var(--black)) 81.5%,
      transparent 81.5%,
      transparent 83.5%,
      var(--black13, var(--black)) 83.5%,
      var(--black13, var(--black)) 86.5%,
      transparent 86.5%,
      
      transparent 93.5%,
      var(--black14, var(--black)) 93.5%,
      var(--black14, var(--black)) 96.5%,
      transparent 96.5%
    );
  
  /* If not animating, the keys can be done with a repeating linear gradient, breaking it out explicity (a few lines down) allows us more animation options 
  --white-keys: repeating-linear-gradient(to bottom, 
      var(--white-between) 0%,
      var(--white-between) 0.4%,
      var(--white) 0.4%,
      var(--white) 5%);
  */
  
  --white-keys: linear-gradient(to bottom, 
      var(--white-between) 0%,
      var(--white-between) 0.4%,
      var(--white1, var(--white)) 0.4%,
      var(--white1, var(--white)) 5%, 
      var(--white-between) 5%,
      var(--white-between) 5.4%,
      var(--white2, var(--white)) 5.4%,
      var(--white2, var(--white)) 10%, 
      var(--white-between) 10%,
      var(--white-between) 10.4%,
      var(--white3, var(--white)) 10.4%,
      var(--white3, var(--white)) 15%, 
      var(--white-between) 15%,
      var(--white-between) 15.4%,
      var(--white4, var(--white)) 15.4%,
      var(--white4, var(--white)) 20%, 
      var(--white-between) 20%,
      var(--white-between) 20.4%,
      var(--white5, var(--white)) 20.4%,
      var(--white5, var(--white)) 25%, 
      var(--white-between) 25%,
      var(--white-between) 25.4%,
      var(--white6, var(--white)) 25.4%,
      var(--white6, var(--white)) 30%, 
      var(--white-between) 30%,
      var(--white-between) 30.4%,
      var(--white7, var(--white)) 30.4%,
      var(--white7, var(--white)) 35%, 
      var(--white-between) 35%,
      var(--white-between) 35.4%,
      var(--white8, var(--white)) 35.4%,
      var(--white8, var(--white)) 40%, 
      var(--white-between) 40%,
      var(--white-between) 40.4%,
      var(--white9, var(--white)) 40.4%,
      var(--white9, var(--white)) 45%, 
      var(--white-between) 45%,
      var(--white-between) 45.4%,
      var(--white10, var(--white)) 45.4%,
      var(--white10, var(--white)) 50%, 
      var(--white-between) 50%,
      var(--white-between) 50.4%,
      var(--white11, var(--white)) 50.4%,
      var(--white11, var(--white)) 55%, 
      var(--white-between) 55%,
      var(--white-between) 55.4%,
      var(--white12, var(--white)) 55.4%,
      var(--white12, var(--white)) 60%, 
      var(--white-between) 60%,
      var(--white-between) 60.4%,
      var(--white13, var(--white)) 60.4%,
      var(--white13, var(--white)) 65%, 
      var(--white-between) 65%,
      var(--white-between) 65.4%,
      var(--white14, var(--white)) 65.4%,
      var(--white14, var(--white)) 70%, 
      var(--white-between) 70%,
      var(--white-between) 70.4%,
      var(--white15, var(--white)) 70.4%,
      var(--white15, var(--white)) 75%, 
      var(--white-between) 75%,
      var(--white-between) 75.4%,
      var(--white16, var(--white)) 75.4%,
      var(--white16, var(--white)) 80%, 
      var(--white-between) 80%,
      var(--white-between) 80.4%,
      var(--white17, var(--white)) 80.4%,
      var(--white17, var(--white)) 85%, 
      var(--white-between) 85%,
      var(--white-between) 85.4%,
      var(--white18, var(--white)) 85.4%,
      var(--white18, var(--white)) 90%, 
      var(--white-between) 90%,
      var(--white-between) 90.4%,
      var(--white19, var(--white)) 90.4%,
      var(--white19, var(--white)) 95%, 
      var(--white-between) 95%,
      var(--white-between) 95.4%,
      var(--white20, var(--white)) 95.4%,
      var(--white20, var(--white)) 100%);
  
  --keyboard-base: linear-gradient(to right, var(--color3alt), var(--color3alt));
  
  --black-keys-position: 45% center;
  --black-keys-size: 36% 84%;
  --white-keys-position: left center;
  --white-keys-size: 66% 84%;
}













body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
  background: hsl(33, 80%, 9%);
}
a {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 2vmin;
  background: hsla(43, 0%, 0%, .4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, --apple-system, 'Segoe UI', sans-serif;
  color: #fafaff;
  
  display: none;
}





/*Downloaded from https://www.codeseek.co/danwilson/single-div-accordion-breakdown-keyboard-VbQXjj */
    //Uncomment the following to show the `requestAnimationFrame` animation

/*
var div = document.querySelector('div');
var buttons = {};
const numBlackKeys = 14;
const numWhiteKeys = 20;

function pressKeys() {
  var now = Date.now();
  var blackKey = Math.ceil((now % 2800) / 200);
  var whiteKey = Math.ceil((now % 4000) / 200);
  div.style.setProperty('--black'+blackKey, 'var(--color2alt)');
  div.style.setProperty('--black'+((blackKey - 1) || numBlackKeys), 'var(--black)');
  div.style.setProperty('--white'+whiteKey, 'var(--color1alta)');
  div.style.setProperty('--white'+((whiteKey - 1) || numWhiteKeys), 'var(--white)');
  requestAnimationFrame(pressKeys);
}
pressKeys();
/**/

Comments