Konfetti-Knopf

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HTML

<button id="button" class="ready" onclick="clickButton();">
  
  <div class="message submitMessage">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 13 12.2">
      <polyline stroke="currentColor" points="2,7.1 6.5,11.1 11,7.1 "/>
      <line stroke="currentColor" x1="6.5" y1="1.2" x2="6.5" y2="10.3"/>
    </svg> <span class="button-text">Submit</span>
  </div>
  
  <div class="message loadingMessage">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 19 17">
      <circle class="loadingCircle" cx="2.2" cy="10" r="1.6"/>
      <circle class="loadingCircle" cx="9.5" cy="10" r="1.6"/>
      <circle class="loadingCircle" cx="16.8" cy="10" r="1.6"/>
    </svg>
  </div>
  
  <div class="message successMessage">
    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 13 11">
      <polyline stroke="currentColor" points="1.4,5.8 5.1,9.5 11.6,2.1 "/>
    </svg> <span class="button-text">Success</span>
  </div>
</button>

<a class="website-link" href="https://codepen.io/coopergoeke" target="_blank" rel="noopener noreferrer">
  <svg class="website-link__icon" viewBox="0 0 936.86 1054.94">
    <circle cx="468.43" cy="607.07" r="395.02" fill="#fff" stroke="#8aa8c5" stroke-width="55" stroke-miterlimit="10"/>
    <path d="M235.76 936.24l9.7-135.08c3.7-53.1 43.2-96.01 96.01-93.96h250.85c52.81-2.05 92.33 41.65 96.01 93.96l10.73 135.81s-98.94 65.12-231.06 65.12-232.24-65.85-232.24-65.85z" fill="#293b67"/>
    <circle cx="468.43" cy="607.07" r="395.02" fill="none" stroke="#8aa8c5" stroke-width="55" stroke-miterlimit="10"/>
    <path d="M532.23 716.09c0 23.61-35.44 30-64.23 30s-64.23-8.39-64.23-30V607.76h128.46v108.33z" fill="#e2cfbb"/>
    <path d="M532.23 678.63s-35.44 8.46-64.23 8.46-64.23-7.83-64.23-7.83v-130.5h128.46v129.87z" fill="#d3c2b2"/>
    <path d="M722.57 326.26c0 193.67-79.11 350.67-255.53 350.67s-253.25-157-253.25-350.67 156.76-210.31 253.25-210.31c126.23 0 255.53 16.64 255.53 210.31z" fill="#ffe8cc"/>
    <path d="M604.47 634.6c-11.18 8.23-23.2 15.37-36.06 21.33-29.33 13.58-63.06 20.99-101.38 20.99-31.91 0-60.57-5.14-86.1-14.7-50.16-18.78-88.26-54.66-115.33-102.22-35.3-62.04-51.82-143.95-51.82-233.74 0-83.76 29.32-134.41 70.41-164.91-90.46 362.86 101.1 570.06 320.28 473.25z" fill="#f3ddc3"/>
    <path d="M701.59 182.44c-6.72-15.99-8.89-39.53-18.6-51.9-1.69-2.16-6.62-3.91-12.43-5.52-15.99-16.61-43.59-39.48-65.94-49.1-7.45-3.21-49.94-38.95-58.11-41.45-6.06-1.85-3.35 25.38-19.3 18.59-31.38-13.36-71.2-32.91-85.46-34.43-17.17-1.84 6.77 41.39-12.69 41.39-36.11 0-65.27-23.14-82.97-25.55-1.48 22.91-9.35 37.78-24.01 44.8-12.97 6.21-42.51.74-53.19 9.43 8.93 20.86-.31 22.93-1.87 37.18-7.32 3.08-17.47 5.36-17.47 5.36-11.17 13.67-10.86 35.77-18.24 54.03-7.44 18.42-12.96 39.27-16.63 62.75-3.65 23.39-3.52 72.17-3.52 101 0 96.83 56.25-132.84 91.88-160.87 35.63-28.02 164-32.7 164-32.7S620 163.71 648.95 193.9c28.95 30.18 75.9 249.36 75.9 160.96 0-59.25-7.63-135.22-23.26-172.42z" fill="#f2cf6f"/>
    <path d="M441.75 18.63c-15.02-1.61 1.38 31.23-7.26 39.53 15.28-3.58 10.26-39.58 7.26-39.53z" fill="#d8b45c"/>
    <path d="M346.09 34.47c-1.48 22.91-12.06 43.85-33.99 47.54 12.81-1.1 21.29 3.03 34.75-2.18 17.45-6.76 16.94-42.95-.76-45.36z" fill="#d8b45c"/>
    <path d="M268.89 88.7c8.93 20.86-.31 22.93-1.87 37.18-7.32 3.08-17.47 5.36-17.47 5.36-11.17 13.67-10.86 35.77-18.24 54.03-7.44 18.42-12.96 39.27-16.63 62.75-3.65 23.39 15.73-33.35 48.77-64.39 32.36-30.39 16.12-103.62 5.44-94.93z" fill="#d8b45c"/>
    <path d="M505.31 460.4c0-10.8-16.63-19.55-37.14-19.55s-37.14 8.75-37.14 19.55 74.28 10.79 74.28 0z" fill="#d3bfae"/>
    <path d="M330.65 366.32c28.67-30.62 53.86-31.06 82.1 0" fill="none" stroke="#000" stroke-width="14" stroke-linecap="round" stroke-miterlimit="10"/>
    <path d="M521.65 366.32c28.67-30.62 53.86-31.06 82.1 0" fill="none" stroke="#000" stroke-width="14" stroke-linecap="round" stroke-miterlimit="10"/>
    <path d="M468.01 617.93c-35.42 0-71.93-28.05-71.93-55.82 0-12.56 10.52-18.84 23.38-18.84h97.43c12.86 0 23.38 6.31 23.38 18.84 0 30.2-36.84 55.82-72.26 55.82z" fill="#824446"/>
    <defs>
      <path id="a" d="M468.01 617.93c-35.42 0-71.93-28.05-71.93-55.82 0-12.56 10.52-18.84 23.38-18.84h97.43c12.86 0 23.38 6.31 23.38 18.84 0 30.2-36.84 55.82-72.26 55.82z"/>
    </defs>
    <clipPath id="b">
      <use xlink:href="#a" overflow="visible"/>
    </clipPath>
    <circle cx="468.17" cy="614.05" r="30" clip-path="url(#b)" fill="#f37879"/>
  </svg>
  <span class="website-link__name">Cooper <span class="website-link__last-name">Goeke</span></span>
  <span class="website-link__message">Check out more of my work</span>
</a>

CSS

@keyframes loading {
  0%   { cy: 10; }
  25%  { cy: 3; }
  50%  { cy: 10; }
}

body {
  -webkit-font-smoothing: antialiased;
  background-color: #f4f7ff;
}

canvas {
  height: 100vh;
  pointer-events: none;
  position: fixed;
  width: 100%;
  z-index: 2;
}

button {
  background: none;
  border: none;
  color: #f4f7ff;
  cursor: pointer;
  font-family: 'Quicksand', sans-serif;
  font-size: 14px;
  font-weight: 500;
  height: 40px;
  left: 50%;
  outline: none;
  overflow: hidden;
  padding: 0 10px;
  position: fixed;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 190px;
  -webkit-tap-highlight-color: transparent;
  z-index: 1;

&::before {
    background: #1f2335;
    border-radius: 50px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, .4) inset;
    content: '';
    display: block;
    height: 100%;
    margin: 0 auto;
    position: relative;
    transition: width .2s cubic-bezier(.39,1.86,.64,1) .3s;
    width: 100%;
  }
}

// READY STATE
button.ready {
  .submitMessage svg {
    opacity: 1;
    top: 1px;
    transition: top .4s ease 600ms, opacity .3s linear 600ms;
  }

.submitMessage .button-text span {
    top: 0;
    opacity: 1;
    transition: all .2s ease calc(var(--dr) + 600ms);
  }
}

// LOADING STATE
button.loading {
  &::before {
    transition: width .3s ease;
    width: 80%;
  }

.loadingMessage {
    opacity: 1;
  }

.loadingCircle {
    animation-duration: 1s;
    animation-iteration-count: infinite;
    animation-name: loading;
    cy: 10;
  }
}

// COMPLETE STATE
button.complete {
  .submitMessage svg {
    top: -30px;
    transition: none;
  }

.submitMessage .button-text span {
    top: -8px;
    transition: none;
  }

.loadingMessage {
    top: 80px;
  }

.successMessage .button-text span {
    left: 0;
    opacity: 1;
    transition: all .2s ease calc(var(--d) + 1000ms);
  }

.successMessage svg { 
    stroke-dashoffset: 0;
    transition: stroke-dashoffset .3s ease-in-out 1.4s;
  }
}

.button-text span {
  opacity: 0;
  position: relative;
}

.message {
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
}

.message svg {
  display: inline-block;
  fill: none;
  margin-right: 5px;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.submitMessage {
  .button-text span {
    top: 8px;
    transition: all .2s ease var(--d);
  }

svg {
    color: #5c86ff;
    margin-left: -1px;
    opacity: 0;
    position: relative;
    top: 30px;
    transition: top .4s ease, opacity .3s linear;
    width: 14px;
  }
}

.loadingMessage {
  opacity: 0;
  transition: opacity .3s linear .3s, top .4s cubic-bezier(.22,0,.41,-0.57);

svg {
    fill: #5c86ff;
    margin: 0;
    width: 22px;
  }
}

.successMessage {
  .button-text span {
    left: 5px;
    transition: all .2s ease var(--dr);
  }
  
  svg {
    color: #5cffa1;
    stroke-dasharray: 20;
    stroke-dashoffset: 20;
    transition: stroke-dashoffset .3s ease-in-out;
    width: 14px;
  }
}

.loadingCircle:nth-child(2) { animation-delay: .1s }
.loadingCircle:nth-child(3) { animation-delay: .2s }

/* Website Link */
.website-link {
  background: #f8faff;
  border-radius: 50px 0 0 50px;
  bottom: 30px;
  color: #324b77;
  cursor: pointer;
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  height: 34px;
  filter: drop-shadow(2px 3px 4px rgba(#000, .1));
  padding: 0 20px 0 40px;
  position: fixed;
  right: 0;
  text-align: left;
  text-decoration: none;

&__icon {
    left: -10px;
    position: absolute;
    top: -12px;
    width: 44px;
  }

&__name {
    display: block;
    font-size: 14px;
    line-height: 14px;
    margin: 5px 0 3px;
  }

&__last-name {
    color: #55bada;
  }

&__message {
    color: #8aa8c5;
    display: block;
    font-size: 7px;
    line-height: 7px;
  }
}

JS

// ammount to add on each button press
const confettiCount = 20
const sequinCount = 10

// "physics" variables
const gravityConfetti = 0.3
const gravitySequins = 0.55
const dragConfetti = 0.075
const dragSequins = 0.02
const terminalVelocity = 3

// init other global elements
const button = document.getElementById('button')
var disabled = false
const canvas = document.getElementById('canvas')
const ctx = canvas.getContext('2d')
canvas.width = window.innerWidth
canvas.height = window.innerHeight
let cx = ctx.canvas.width / 2
let cy = ctx.canvas.height / 2

// add Confetto/Sequin objects to arrays to draw them
let confetti = []
let sequins = []

// colors, back side is darker for confetti flipping
const colors = [
  { front : '#7b5cff', back: '#6245e0' }, // Purple
  { front : '#b3c7ff', back: '#8fa5e5' }, // Light Blue
  { front : '#5c86ff', back: '#345dd1' }  // Darker Blue
]

// helper function to pick a random number within a range
randomRange = (min, max) => Math.random() * (max - min) + min

// helper function to get initial velocities for confetti
// this weighted spread helps the confetti look more realistic
initConfettoVelocity = (xRange, yRange) => {
  const x = randomRange(xRange[0], xRange[1])
  const range = yRange[1] - yRange[0] + 1
  let y = yRange[1] - Math.abs(randomRange(0, range) + randomRange(0, range) - range)
  if (y >= yRange[1] - 1) {
    // Occasional confetto goes higher than the max
    y += (Math.random() < .25) ? randomRange(1, 3) : 0
  }
  return {x: x, y: -y}
}

// Confetto Class
function Confetto() {
  this.randomModifier = randomRange(0, 99)
  this.color = colors[Math.floor(randomRange(0, colors.length))]
  this.dimensions = {
    x: randomRange(5, 9),
    y: randomRange(8, 15),
  }
  this.position = {
    x: randomRange(canvas.width/2 - button.offsetWidth/4, canvas.width/2 + button.offsetWidth/4),
    y: randomRange(canvas.height/2 + button.offsetHeight/2 + 8, canvas.height/2 + (1.5 * button.offsetHeight) - 8),
  }
  this.rotation = randomRange(0, 2 * Math.PI)
  this.scale = {
    x: 1,
    y: 1,
  }
  this.velocity = initConfettoVelocity([-9, 9], [6, 11])
}
Confetto.prototype.update = function() {
  // apply forces to velocity
  this.velocity.x -= this.velocity.x * dragConfetti
  this.velocity.y = Math.min(this.velocity.y + gravityConfetti, terminalVelocity)
  this.velocity.x += Math.random() > 0.5 ? Math.random() : -Math.random()
  
  // set position
  this.position.x += this.velocity.x
  this.position.y += this.velocity.y

// spin confetto by scaling y and set the color, .09 just slows cosine frequency
  this.scale.y = Math.cos((this.position.y + this.randomModifier) * 0.09)    
}

// Sequin Class
function Sequin() {
  this.color = colors[Math.floor(randomRange(0, colors.length))].back,
  this.radius = randomRange(1, 2),
  this.position = {
    x: randomRange(canvas.width/2 - button.offsetWidth/3, canvas.width/2 + button.offsetWidth/3),
    y: randomRange(canvas.height/2 + button.offsetHeight/2 + 8, canvas.height/2 + (1.5 * button.offsetHeight) - 8),
  },
  this.velocity = {
    x: randomRange(-6, 6),
    y: randomRange(-8, -12)
  }
}
Sequin.prototype.update = function() {
  // apply forces to velocity
  this.velocity.x -= this.velocity.x * dragSequins
  this.velocity.y = this.velocity.y + gravitySequins
  
  // set position
  this.position.x += this.velocity.x
  this.position.y += this.velocity.y   
}

// add elements to arrays to be drawn
initBurst = () => {
  for (let i = 0; i < confettiCount; i++) {
    confetti.push(new Confetto())
  }
  for (let i = 0; i < sequinCount; i++) {
    sequins.push(new Sequin())
  }
}

// draws the elements on the canvas
render = () => {
  ctx.clearRect(0, 0, canvas.width, canvas.height)
  
  confetti.forEach((confetto, index) => {
    let width = (confetto.dimensions.x * confetto.scale.x)
    let height = (confetto.dimensions.y * confetto.scale.y)
    
    // move canvas to position and rotate
    ctx.translate(confetto.position.x, confetto.position.y)
    ctx.rotate(confetto.rotation)

// update confetto "physics" values
    confetto.update()
    
    // get front or back fill color
    ctx.fillStyle = confetto.scale.y > 0 ? confetto.color.front : confetto.color.back
    
    // draw confetto
    ctx.fillRect(-width / 2, -height / 2, width, height)
    
    // reset transform matrix
    ctx.setTransform(1, 0, 0, 1, 0, 0)

// clear rectangle where button cuts off
    if (confetto.velocity.y < 0) {
      ctx.clearRect(canvas.width/2 - button.offsetWidth/2, canvas.height/2 + button.offsetHeight/2, button.offsetWidth, button.offsetHeight)
    }
  })

sequins.forEach((sequin, index) => {  
    // move canvas to position
    ctx.translate(sequin.position.x, sequin.position.y)
    
    // update sequin "physics" values
    sequin.update()
    
    // set the color
    ctx.fillStyle = sequin.color
    
    // draw sequin
    ctx.beginPath()
    ctx.arc(0, 0, sequin.radius, 0, 2 * Math.PI)
    ctx.fill()

// reset transform matrix
    ctx.setTransform(1, 0, 0, 1, 0, 0)

// clear rectangle where button cuts off
    if (sequin.velocity.y < 0) {
      ctx.clearRect(canvas.width/2 - button.offsetWidth/2, canvas.height/2 + button.offsetHeight/2, button.offsetWidth, button.offsetHeight)
    }
  })

// remove confetti and sequins that fall off the screen
  // must be done in seperate loops to avoid noticeable flickering
  confetti.forEach((confetto, index) => {
    if (confetto.position.y >= canvas.height) confetti.splice(index, 1)
  })
  sequins.forEach((sequin, index) => {
    if (sequin.position.y >= canvas.height) sequins.splice(index, 1)
  })

window.requestAnimationFrame(render)
}

// cycle through button states when clicked
clickButton = () => {
  if (!disabled) {
    disabled = true
    // Loading stage
    button.classList.add('loading')
    button.classList.remove('ready')
    setTimeout(() => {
      // Completed stage
      button.classList.add('complete')
      button.classList.remove('loading')
      setTimeout(() => {
        window.initBurst()
        setTimeout(() => {
          // Reset button so user can select it again
          disabled = false
          button.classList.add('ready')
          button.classList.remove('complete')
        }, 4000)
      }, 320)
    }, 1800)
  }
}

// re-init canvas if the window size changes
resizeCanvas = () => {
  canvas.width = window.innerWidth
  canvas.height = window.innerHeight
  cx = ctx.canvas.width / 2
  cy = ctx.canvas.height / 2
}

// resize listenter
window.addEventListener('resize', () => {
  resizeCanvas()
})

// click button on spacebar or return keypress
document.body.onkeyup = (e) => {
  if (e.keyCode == 13 || e.keyCode == 32) {
    clickButton()
  }
}

// Set up button text transition timings on page load
textElements = button.querySelectorAll('.button-text')
textElements.forEach((element) => {
  characters = element.innerText.split('')
  let characterHTML = ''
  characters.forEach((letter, index) => {
    characterHTML += `<span class="char${index}" style="--d:${index * 30}ms; --dr:${(characters.length - index - 1) * 30}ms;">${letter}</span>`
  })
  element.innerHTML = characterHTML
})

// kick off the render loop
window.initBurst()
render()

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