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Автор темы
- #1
Код:
<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">Скачать</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">Удачно</span>
</div>
</button>
<canvas id="canvas"></canvas>
Код:
@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: 'Roboto', Arial;
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;
z-index: 1;
}
button::before {
background: #1f2335;
border-radius: 50px;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.4) inset;
content: '';
display: block;
height: 100%;
margin: 0 auto;
position: relative;
transition: width 0.2s cubic-bezier(0.39, 1.86, 0.64, 1) 0.3s;
width: 100%;
}
button.ready .submitMessage svg {
opacity: 1;
top: 1px;
transition: top .4s ease 600ms, opacity .3s linear 600ms;
}
button.ready .submitMessage .button-text span {
top: 0;
opacity: 1;
transition: all 0.2s ease calc(var(--dr) + 600ms);
}
button.loading::before {
transition: width .3s ease;
width: 80%;
}
button.loading .loadingMessage {
opacity: 1;
}
button.loading .loadingCircle {
animation-duration: 1s;
animation-iteration-count: infinite;
animation-name: loading;
cy: 10;
}
button.complete .submitMessage svg {
top: -30px;
transition: none;
}
button.complete .submitMessage .button-text span {
top: -8px;
transition: none;
}
button.complete .loadingMessage {
top: 80px;
}
button.complete .successMessage .button-text span {
left: 0;
opacity: 1;
transition: all 0.2s ease calc(var(--d) + 1000ms);
}
button.complete .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 0.2s ease var(--d);
}
.submitMessage 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 0.3s linear 0.3s, top 0.4s cubic-bezier(0.22, 0, 0.41, -0.57);
}
.loadingMessage svg {
fill: #5c86ff;
margin: 0;
width: 22px;
}
.successMessage .button-text span {
left: 5px;
transition: all 0.2s ease var(--dr);
}
.successMessage svg {
color: #5cffa1;
stroke-dasharray: 20;
stroke-dashoffset: 20;
transition: stroke-dashoffset .3s ease-in-out;
width: 14px;
}
.loadingCircle:nth-child(2) {
animation-delay: 0.1s;
}
.loadingCircle:nth-child(3) {
animation-delay: 0.2s;
}
Код:
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 Confetti/Sequince objects to arrays to draw them
let confetti = [];
let sequins = [];
// 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;
// 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
render();
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