<button class="button">
<svg class="background" preserveAspectRatio="none" viewBox="0 0 164 45">
<path d="M0 3C0 1.34315 1.33152 0 2.98838 0C15.6933 0 52.8204 0 82 0C111.114 0 148.441 0 161.007 0C162.664 0 164 1.34315 164 3V42C164 43.6569 162.657 45 161 45H3C1.34314 45 0 43.6569 0 42V3Z" />
</svg>
<div class="label">Download</div>
<div class="success">Open file</div>
<svg class="progress" viewBox="0 0 164 32"></svg>
</button>
<!-- dribbble - twitter -->
<a class="dribbble" href="https://dribbble.com/ai" target="_blank"><img src="https://cdn.dribbble.com/assets/dribbble-ball-mark-2bd45f09c2fb58dbbfb44766d5d1d07c5a12972d602ef8b32204d28fa3dda554.svg" alt=""></a>
<a class="twitter" target="_blank" href="https://twitter.com/aaroniker_me"><svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" viewBox="0 0 72 72"><path d="M67.812 16.141a26.246 26.246 0 0 1-7.519 2.06 13.134 13.134 0 0 0 5.756-7.244 26.127 26.127 0 0 1-8.313 3.176A13.075 13.075 0 0 0 48.182 10c-7.229 0-13.092 5.861-13.092 13.093 0 1.026.118 2.021.338 2.981-10.885-.548-20.528-5.757-26.987-13.679a13.048 13.048 0 0 0-1.771 6.581c0 4.542 2.312 8.551 5.824 10.898a13.048 13.048 0 0 1-5.93-1.638c-.002.055-.002.11-.002.162 0 6.345 4.513 11.638 10.504 12.84a13.177 13.177 0 0 1-3.449.457c-.846 0-1.667-.078-2.465-.231 1.667 5.2 6.499 8.986 12.23 9.09a26.276 26.276 0 0 1-16.26 5.606A26.21 26.21 0 0 1 4 55.976a37.036 37.036 0 0 0 20.067 5.882c24.083 0 37.251-19.949 37.251-37.249 0-.566-.014-1.134-.039-1.694a26.597 26.597 0 0 0 6.533-6.774z"></path></svg></a>.button {
--background: #1A1C27;
--background-hover: #292C3B;
--background-progress: #999EB4;
--background-progress-active: #275EFE;
--background-progress-success: #292C3B;
--text: #fff;
--success-text: #292C3B;
display: flex;
align-items: center;
outline: none;
cursor: pointer;
position: relative;
border: 0;
padding: 0;
line-height: 21px;
font-family: inherit;
font-weight: 600;
font-size: 14px;
background: none;
color: var(--text);
-webkit-tap-highlight-color: transparent;
-webkit-appearance: none;
--letters-y: 0px;
--letters-r: 0deg;
--letters-o: 1;
--progress-opacity: 0;
--background-opacity: 1;
--progress: 157;
--progress-y: .5px;
--progress-sx: 1;
--progress-sy: 1;
--success-opacity: 0;
&:hover {
--fill: var(--background-hover);
}
&.active {
--fill: var(--background-progress);
--fill-delay: .2s;
--fill-duration: .4s;
}
&.success {
--success-background: var(--background-progress-success);
}
svg {
display: block;
position: absolute;
width: 100%;
left: 0;
right: 0;
&.background {
height: 45px;
top: 0;
opacity: var(--background-opacity);
fill: var(--fill, var(--background));
transition: fill var(--fill-duration, .2s) linear var(--fill-delay, 0s);
}
&.progress {
height: 32px;
bottom: -13px;
stroke: var(--background-progress);
fill: none;
stroke-width: 7;
stroke-linecap: round;
pointer-events: none;
opacity: var(--progress-opacity);
transform: translateY(var(--progress-y)) scale(var(--progress-sx), var(--progress-sy)) translateZ(0);
path {
&:last-child {
stroke-dasharray: 157;
stroke-dashoffset: var(--progress);
stroke: var(--success-background, var(--background-progress-active));
transition: stroke .2s linear;
}
}
}
}
.label,
.success {
z-index: 1;
}
.label {
position: relative;
display: flex;
padding: 12px 40px;
opacity: var(--letters-o);
span {
display: block;
transform: translateY(calc(var(--letters-y) * var(--move))) translateZ(0) rotate(calc(var(--letters-r) * var(--rotate) * var(--part)));
}
}
.success {
position: absolute;
left: 0;
right: 0;
top: 12px;
color: var(--success-text);
opacity: var(--success-opacity);
}
}
html {
box-sizing: border-box;
-webkit-font-smoothing: antialiased;
}
* {
box-sizing: inherit;
&:before,
&:after {
box-sizing: inherit;
}
}
// Center & dribbble
body {
min-height: 100vh;
display: flex;
font-family: 'Inter', Arial;
justify-content: center;
align-items: center;
background: #ECEEF6;
.dribbble {
position: fixed;
display: block;
right: 20px;
bottom: 20px;
img {
display: block;
height: 28px;
}
}
.twitter {
position: fixed;
display: block;
right: 64px;
bottom: 14px;
svg {
width: 32px;
height: 32px;
fill: #1da1f2;
}
}
}gsap.registerPlugin(MorphSVGPlugin)
document.querySelectorAll('.button').forEach(button => {
let label = button.querySelector('.label'),
path = button.querySelector('.background path'),
svgProgress = button.querySelector('.progress'),
letters = label.textContent.trim().split(''),
pathProgress = new Proxy({
y: null
}, {
set(target, key, value) {
target[key] = value
if(target.y !== null) {
svgProgress.innerHTML = getPath(target.y, .3)
}
return true
},
get(target, key) {
return target[key]
}
})
pathProgress.y = 16
label.innerHTML = ''
function elements(letter, index, array) {
let element = document.createElement('span'),
part = (index >= array.length / 2) ? -1 : 1,
position = (index >= array.length / 2) ? array.length / 2 - index + (array.length / 2 - 1) : index,
move = position / (array.length / 2),
rotate = 1 - move
element.innerHTML = !letter.trim() ? ' ' : letter
element.style.setProperty('--move', move)
element.style.setProperty('--rotate', rotate)
element.style.setProperty('--part', part)
label.appendChild(element)
}
letters.forEach(elements);
button.addEventListener('mouseenter', e => {
if(button.classList.contains('active')) {
return
}
gsap.to(path, {
duration: .15,
morphSVG: 'M0 3C0 1.34315 1.33159 0.0090786 2.98745 0.0667219C15.6914 0.508972 52.8196 3 82 3C111.115 3 148.443 0.520171 161.009 0.0697387C162.664 0.010385 164 1.34315 164 3V42C164 43.6569 162.657 45 161 45H3C1.34314 45 0 43.6569 0 42V3Z'
})
gsap.to(button, {
duration: .15,
'--letters-y': '2px',
'--letters-r': '8deg'
})
})
button.addEventListener('mouseleave', e => {
if(button.classList.contains('active')) {
return
}
gsap.to(path, {
duration: .15,
morphSVG: 'M0 3C0 1.34315 1.33152 0 2.98838 0C15.6933 0 52.8204 0 82 0C111.114 0 148.441 0 161.007 0C162.664 0 164 1.34315 164 3V42C164 43.6569 162.657 45 161 45H3C1.34314 45 0 43.6569 0 42V3Z'
})
gsap.to(button, {
duration: .15,
'--letters-y': '0px',
'--letters-r': '0deg'
})
})
button.addEventListener('click', e => {
if(button.classList.contains('active')) {
return
}
button.classList.add('active')
gsap.to(button, {
'--letters-o': 0,
'--letters-y': '8px',
'--letters-r': '12deg',
duration: .2
})
gsap.to(path, {
keyframes: [{
morphSVG: 'M0 3C0 1.34315 1.33326 0.0498162 2.96247 0.351221C15.6427 2.69708 52.8005 16 82 16C111.136 16 148.496 2.75523 161.036 0.366778C162.663 0.0567542 164 1.34315 164 3V42C164 43.6569 162.657 45 161 45H3C1.34314 45 0 43.6569 0 42V3Z',
duration: .2,
ease: 'none'
}, {
morphSVG: 'M0 42C0 40.3431 1.33152 39 2.98838 39C15.6933 39 52.8204 39 82 39C111.114 39 148.441 39 161.007 39C162.664 39 164 40.3431 164 42V42C164 43.6569 162.657 45 161 45H3C1.34314 45 0 43.6569 0 42V42Z',
duration: .4,
ease: 'elastic.out(1, .9)',
onComplete() {
gsap.set(button, {
'--background-opacity': 0,
'--progress-opacity': 1
})
gsap.to(button, {
'--progress': 0,
duration: 3,
onComplete() {
button.classList.add('success')
gsap.to(pathProgress, {
keyframes: [{
duration: .2,
y: 10
}, {
duration: .6,
ease: 'elastic.out(1, .5)',
y: 16
}]
})
gsap.to(button, {
'--progress-y': '-8px',
'--progress-sx': .42,
'--progress-sy': .35,
'--success-opacity': 1,
duration: .2,
delay: .1,
onComplete() {
button.addEventListener('click', e => {
window.open('https://twitter.com/aaroniker_me', '_blank')
})
}
})
}
})
}
}]
})
})
})
function getPoint(point, i, a, smoothing) {
let cp = (current, previous, next, reverse) => {
let p = previous || current,
n = next || current,
o = {
length: Math.sqrt(Math.pow(n[0] - p[0], 2) + Math.pow(n[1] - p[1], 2)),
angle: Math.atan2(n[1] - p[1], n[0] - p[0])
},
angle = o.angle + (reverse ? Math.PI : 0),
length = o.length * smoothing;
return [current[0] + Math.cos(angle) * length, current[1] + Math.sin(angle) * length];
},
cps = cp(a[i - 1], a[i - 2], point, false),
cpe = cp(point, a[i - 1], a[i + 1], true);
return `C ${cps[0]},${cps[1]} ${cpe[0]},${cpe[1]} ${point[0]},${point[1]}`;
}
function getPath(update, smoothing) {
let points = [
[3.5, 16],
[82, update],
[160.5, 16]
],
d = points.reduce((acc, point, i, a) => i === 0 ? `M ${point[0]},${point[1]}` : `${acc} ${getPoint(point, i, a, smoothing)}`, '');
return `<path d="${d}" /><path d="${d}" />`;
}
