SyedImtiyazAli's button

About SyedImtiyazAli's button

SyedImtiyazAli's button is an animated CSS button by @SyedImtiyazAli. Preview the interaction, customize its HTML, styles and JavaScript, or download the files with creator credit.

Effects and categories

Hover effects, Animated

Using this example

Copy the HTML or download index.html, style.css and app.js. Test keyboard focus, motion and contrast in your own project.

Usage, Tailwind and licensing questions

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./style.css">
</head>
<body>
    
    <a href="#">
        <span>Button</span>
        <div class="liquid"></div>
      </a>
  
  <script src="./script.js"></script>
  
</body>
</html>

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #0c0c0c;
  }
  
  a {
    position: relative;
    padding: 20px 50px;
    display: block;
    text-decoration: none;
    text-transform: uppercase;
    width: 200px;
    overflow: hidden;
    border-radius: 40px;
  }
  
  a span {
    position: relative;
    color: #fff;
    font-size: 20px;
    font-family: Arial;
    letter-spacing: 8px;
    z-index: 1;
  }
  
  a .liquid {
    position: absolute;
    top: -80px;
    left: 0;
    width: 200px;
    height: 200px;
    background: #4973ff;
    box-shadow: inset 0 0 50px rgba(0, 0, 0, .5);
    transition: .5s;
  }
  
  a .liquid::after,
  a .liquid::before {
    content: '';
    width: 200%;
    height: 200%;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -75%);
    background: #000;
  }
  
  a .liquid::before {
    
    border-radius: 45%;
    background: rgba(20, 20, 20, 1);
    animation: animate 5s linear infinite;
  }
  
  a .liquid::after {
    
    border-radius: 40%;
    background: rgba(20, 20, 20, .5);
    animation: animate 10s linear infinite;
  }
  
  a:hover .liquid{
    top: -120px;
  }
  
  @keyframes animate {
    0% {
      transform: translate(-50%, -75%) rotate(0deg);
    }
    100% {
      transform: translate(-50%, -75%) rotate(360deg);
    }
  }

const tipButtons = document.querySelectorAll('.tip-button')

// Loop through all buttons (allows for multiple buttons on page)
tipButtons.forEach((button) => {
  let coin = button.querySelector('.coin')

  // The larger the number, the slower the animation
  coin.maxMoveLoopCount = 90

  button.addEventListener('click', () => {
    if (button.clicked) return

    button.classList.add('clicked')

    // Wait to start flipping the coin because of the button tilt animation
    setTimeout(() => {
      // Randomize the flipping speeds just for fun
      coin.sideRotationCount = Math.floor(Math.random() * 5) * 90
      coin.maxFlipAngle = (Math.floor(Math.random() * 4) + 3) * Math.PI
      button.clicked = true
      flipCoin()
    }, 50)
  })

  const flipCoin = () => {
    coin.moveLoopCount = 0
    flipCoinLoop()
  }

  const resetCoin = () => {
    coin.style.setProperty('--coin-x-multiplier', 0)
    coin.style.setProperty('--coin-scale-multiplier', 0)
    coin.style.setProperty('--coin-rotation-multiplier', 0)
    coin.style.setProperty('--shine-opacity-multiplier', 0.4)
    coin.style.setProperty('--shine-bg-multiplier', '50%')
    coin.style.setProperty('opacity', 1)
    // Delay to give the reset animation some time before you can click again
    setTimeout(() => {
      button.clicked = false
    }, 300)
  }

  const flipCoinLoop = () => {
    coin.moveLoopCount++
    let percentageCompleted = coin.moveLoopCount / coin.maxMoveLoopCount
    coin.angle = -coin.maxFlipAngle * Math.pow((percentageCompleted - 1), 2) + coin.maxFlipAngle
    
    // Calculate the scale and position of the coin moving through the air
    coin.style.setProperty('--coin-y-multiplier', -11 * Math.pow(percentageCompleted * 2 - 1, 4) + 11)
    coin.style.setProperty('--coin-x-multiplier', percentageCompleted)
    coin.style.setProperty('--coin-scale-multiplier', percentageCompleted * 0.6)
    coin.style.setProperty('--coin-rotation-multiplier', percentageCompleted * coin.sideRotationCount)

    // Calculate the scale and position values for the different coin faces
    // The math uses sin/cos wave functions to similate the circular motion of 3D spin
    coin.style.setProperty('--front-scale-multiplier', Math.max(Math.cos(coin.angle), 0))
    coin.style.setProperty('--front-y-multiplier', Math.sin(coin.angle))

    coin.style.setProperty('--middle-scale-multiplier', Math.abs(Math.cos(coin.angle), 0))
    coin.style.setProperty('--middle-y-multiplier', Math.cos((coin.angle + Math.PI / 2) % Math.PI))

    coin.style.setProperty('--back-scale-multiplier', Math.max(Math.cos(coin.angle - Math.PI), 0))
    coin.style.setProperty('--back-y-multiplier', Math.sin(coin.angle - Math.PI))

    coin.style.setProperty('--shine-opacity-multiplier', 4 * Math.sin((coin.angle + Math.PI / 2) % Math.PI) - 3.2)
    coin.style.setProperty('--shine-bg-multiplier', -40 * (Math.cos((coin.angle + Math.PI / 2) % Math.PI) - 0.5) + '%')

    // Repeat animation loop
    if (coin.moveLoopCount < coin.maxMoveLoopCount) {
      if (coin.moveLoopCount === coin.maxMoveLoopCount - 6) button.classList.add('shrink-landing')
      window.requestAnimationFrame(flipCoinLoop)
    } else {
      button.classList.add('coin-landed')
      coin.style.setProperty('opacity', 0)
      setTimeout(() => {
        button.classList.remove('clicked', 'shrink-landing', 'coin-landed')
        setTimeout(() => {
          resetCoin()
        }, 300)
      }, 1500)
    }
  }
})