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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Component for drawing confetti on a canvas">
<meta name="author" content="Kiril Vatev">
<meta name="keywords" content="canvas,confetti,component,module,animation,javascript,catdad">
<meta name="theme-color" content="#393939">
<title>🎊</title>
<link href="https://fonts.googleapis.com/css?family=Noto+Sans" rel="stylesheet">
<style>
html, body {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
background: #212121;
color: #eee;
font-size: 1em;
font-family: 'Noto Sans', sans-serif;
}
* {
box-sizing: border-box;
}
.sprite {
display: none;
}
a.github-corner {
position: absolute;
top: 0;
right: 0;
width: 80px;
height: 80px;
}
h1, h2, .center {
text-align: center;
}
h2 {
padding: 0;
margin: 0.25em;
}
p {
margin: 0.5em;
}
.container {
position: relative;
max-width: 1000px;
width: 100%;
margin: 0 auto;
}
.group {
position: relative;
width: 100%;
margin: 40px 0;
padding-top: 16px;
border-top: 1px solid #3e3e3e;
border-radius: 20px;
}
.run {
padding: 10px 6px;
margin: 0.75em 0;
background: rgba(255,255,255,0.1);
border: none;
outline: none;
color: #eee;
font-weight: bold;
cursor: pointer;
user-select: none;
opacity: 0.6;
transition: opacity 100ms ease;
}
.group .run:hover {
opacity: 1;
}
.editor {
position: relative;
min-height: 100px;
width: 100%;
}
.editor.ace_dark.ace_editor {
background-color: #363636;
}
.editor.ace_dark .ace_gutter {
color: #8b8b8b;
background: #272727;
}
.flex-rows {
position: relative;
display: block;
width: 100%;
padding-bottom: 1em;
}
.description {
width: 94%;
margin: 10px auto;
padding: 0;
align-items: center;
line-height: 1.5;
}
.left {
flex-grow: 1;
display: flex;
flex-direction: column;
}
a.anchor {
position: relative;
color: currentColor;
text-decoration: none;
}
a.anchor:hover::before {
content: "🔗";
color: currentColor;
position: absolute;
left: -2rem;
top: 0;
transform: scale(0.75, 0.75);
}
footer {
font-size: 0.9rem;
text-align: center;
line-height: 2;
background: rgba(255,255,255,0.1);
}
footer span {
vertical-align: middle;
}
span.icon {
position: relative;
display: inline-block;
height: 1em;
width: 1em;
}
svg.icon {
position: absolute;
pointer-events: none;
left: 0;
width: 100%;
height: 100%;
fill: #e5e5e5;
}
footer a {
text-decoration: none;
color: white;
opacity: 0.85;
will-change: opacity;
}
footer a:hover {
opacity: 1;
}
.custom-canvas {
margin-top: 30px;
width: 100%;
max-width: 1000px;
height: 380px;
background: #363636;
}
@media (min-width: 44em) {
.container {
width: 95%;
}
.flex-rows {
display: flex;
flex-direction: row;
}
.description {
width: 66%;
padding: 0 0 0 1em;
}
}
</style>
<script>
// this page is a demo that is not built, so fudge the module.exports support
// define a global `module` so that the actual source file can use it
window.module = {};
</script>
<script src="src/confetti.js"></script>
<script>
// define the `module.exports` as the `confetti` global, the way that the
// cdn distributed file would
window.confetti = module.exports;
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.3.0/ace.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.7.5/beautify.min.js"></script>
</head>
<body>
<svg class="sprite" xmlns="http://www.w3.org/2000/svg">
<defs>
<symbol id="code" viewBox="0 0 14 16">
<!-- Icon from GitHub Octicons - https://github.com/primer/octicons/ -->
<path d="M9.5 3L8 4.5 11.5 8 8 11.5 9.5 13 14 8 9.5 3 9.5 3ZM4.5 3L0 8 4.5 13 6 11.5 2.5 8 6 4.5 4.5 3 4.5 3Z"/>
</symbol>
<symbol id="heart" viewBox="0 0 12 16">
<!-- Icon from GitHub Octicons - https://github.com/primer/octicons/ -->
<path d="M11.2 3C10.68 2.37 9.95 2.05 9 2 8.03 2 7.31 2.42 6.8 3 6.29 3.58 6.02 3.92 6 4 5.98 3.92 5.72 3.58 5.2 3 4.68 2.42 4.03 2 3 2 2.05 2.05 1.31 2.38 0.8 3 0.28 3.61 0.02 4.28 0 5 0 5.52 0.09 6.52 0.67 7.67 1.25 8.82 3.01 10.61 6 13 8.98 10.61 10.77 8.83 11.34 7.67 11.91 6.51 12 5.5 12 5 11.98 4.28 11.72 3.61 11.2 2.98L11.2 3Z"/>
</symbol>
<symbol id="run" viewBox="0 0 10 10">
<path d="M2 2L8 6L2 10" />
</symbol>
<symbol id="octo" viewBox="0 0 80 80">
<!-- Adapted from Tim Holman's GitHub Corners - https://github.com/tholman/github-corners -->
<path d="M0 0L36.8 36.8 45.3 45.3 80 80 80 0 0 0ZM40.6 34.6C36.3 31.7 38.1 28.8 38.1 28.8 39 26.6 38.7 25.3 38.7 25.3 38.4 23 39.7 24.6 39.7 24.6 41 26.2 40.3 28.2 40.3 28.2 39.6 30.7 41 32.2 42.3 32.9L42.9 32.3C43.8 31.7 44.8 31.4 45.4 31.4 42.9 27.8 40.6 23.7 46.1 18.2 47.7 16.6 49.3 16 51.2 16 51.5 15.4 52.2 13.8 55 12.5 55 12.5 56.6 13.4 57.3 17.6 58.6 18.2 59.8 19.2 61.1 20.5 62.4 21.8 63.4 23 64 24.3 68.5 25.3 69.4 26.6 69.4 26.6 68.2 29.1 66.6 30.1 65.9 30.1 65.9 32 65.3 33.6 63.7 35.2 58.6 40.3 54.1 38.6 50.6 36 50.6 37 50.2 38 49 39.4Q45.9 42.8 45.2 43.6C44.7 44.2 45.3 45.3 45.3 45.3L36.8 36.8C36.8 36.8 37.8 37.4 38.4 36.8L40.6 34.6Z"/>
</symbol>
</defs>
</svg>
<a class="github-corner" href="https://github.com/catdad/canvas-confetti" aria-label="View source on Github">
<svg class="icon"><use xlink:href="#octo"></use></svg>
</a>
<h1>Canvas Confetti</h1>
<div class="container">
<div class="group" data-name="cannon">
<div class="flex-rows">
<div class="left">
<h2><a href="#basic" id="basic" class="anchor">Basic Cannon</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
The default mode... just your regular basic average blast of confetti. But it's still
a little cool, right?
</p>
</div>
</div>
<div class="editor"></div>
</div>
</div>
<div class="container">
<div class="group" data-name="random">
<div class="flex-rows">
<div class="left">
<h2><a href="#random" id="random" class="anchor">Random Direction</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
Go crazy with some randomness. Shoot a random amount of confetti in random directions.
(Go ahead... you know you want to click that button more than once.)
</p>
</div>
</div>
<div class="editor"></div>
</div>
</div>
<div class="container">
<div class="group" data-name="realistic">
<div class="flex-rows">
<div class="left">
<h2><a href="#realistic" id="realistic" class="anchor">Realistic Look</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
If you happened to get curious and changed the particle count to 400 or so, you saw
something disappointing. An even "flattened cone" look to the confetti, making it look
way too perfect and ruining the illusion. We can fix that by mixing a few effects together.
</p>
</div>
</div>
<div class="editor"></div>
</div>
</div>
<div class="container">
<div class="group" data-name="fireworks">
<div class="flex-rows">
<div class="left">
<h2><a href="#fireworks" id="fireworks" class="anchor">Fireworks</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
Why click a button repeatedly when you can have code do it for you? Shoot some firework
of confetti from the sides of page so you can still read the content in the center.
</p>
</div>
</div>
<div class="editor"></div>
</div>
</div>
<div class="container">
<div class="group" data-name="snow">
<div class="flex-rows">
<div class="left">
<h2><a href="#snow" id="snow" class="anchor">Snow</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
The effect is not limited to crazy rapid fire of confetti though. You can create a
wintery mood with gently falling particles across the entire page.
</p>
</div>
</div>
<div class="editor"></div>
</div>
</div>
<div class="container">
<div class="group" data-name="continuous">
<div class="flex-rows">
<div class="left">
<h2><a href="#continuous" id="continuous" class="anchor">School Pride</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
But if you are into crazy rapid fire of confetti, what could be a better use than
to show everyone what you are all about? Tell people where you are from with two
confetti cannons from either side of the page.
</p>
<p class="center">🌰 Go Buckeyes! 🌰</p>
</div>
</div>
<div class="editor"></div>
</div>
</div>
<div class="container">
<div class="group" data-name="custom">
<div class="flex-rows">
<div class="left">
<h2><a href="#custom-canvas" id="custom-canvas" class="anchor">Custom Canvas</a></h2>
<button class="run">
Run
<span class="icon">
<svg class="icon"><use xlink:href="#run"></use></svg>
</span>
</button>
</div>
<div class="description">
<p>
But if you just hate confetti all over the place, there's something here for you
as well. You can limit where the confetti appear by providing your own canvas element.
</p>
</div>
</div>
<div class="editor"></div>
<div class="flex-rows">
<canvas id="my-canvas" class="custom-canvas"></canvas>
</div>
</div>
</div>
<footer>
<a href="https://github.com/catdad">
<span class="icon">
<svg class="icon"><use xlink:href="#code"></use></svg>
</span>
<span> with </span>
<span class="icon">
<svg class="icon"><use xlink:href="#heart"></use></svg>
</span>
<span> by <b>catdad</b></span>
</a>
</footer>
<script>
var modes = {
cannon: function cannon() {
confetti({
particleCount: 100,
spread: 70,
origin: { y: 0.6 }
});
},
random: function random() {
function randomInRange(min, max) {
return Math.random() * (max - min) + min;
}
confetti({
angle: randomInRange(55, 125),
spread: randomInRange(50, 70),
particleCount: randomInRange(50, 100),
origin: { y: 0.6 }
});
},
realistic: function realistic() {
var count = 200;
var defaults = {
origin: { y: 0.7 }
};
function fire(particleRatio, opts) {
confetti(Object.assign({}, defaults, opts, {
particleCount: Math.floor(count * particleRatio)
}));
}
fire(0.25, {
spread: 26,
startVelocity: 55,
});
fire(0.2, {
spread: 60,
});
fire(0.35, {
spread: 100,
decay: 0.91,
});
fire(0.1, {
spread: 120,
startVelocity: 25,
decay: 0.92,
});
fire(0.1, {
spread: 120,
startVelocity: 45,
});
},
fireworks: function fireworks() {
var duration = 15 * 1000;
var animationEnd = Date.now() + duration;
var defaults = { startVelocity: 30, spread: 360, ticks: 60, zIndex: 0 };
function randomInRange(min, max) {
return Math.random() * (max - min) + min;
}
var interval = setInterval(function () {
var timeLeft = animationEnd - Date.now();
if (timeLeft <= 0) {
return clearInterval(interval);
}
var particleCount = 50 * (timeLeft / duration);
// since particles fall down, start a bit higher than random
confetti(Object.assign({}, defaults, { particleCount, origin: { x: randomInRange(0.1, 0.3), y: Math.random() - 0.2 } }));
confetti(Object.assign({}, defaults, { particleCount, origin: { x: randomInRange(0.7, 0.9), y: Math.random() - 0.2 } }));
}, 250);
},
snow: function snow() {
var duration = 15 * 1000;
var animationEnd = Date.now() + duration;
var skew = 1;
(function frame() {
var timeLeft = animationEnd - Date.now();
var ticks = Math.max(200, 500 * (timeLeft / duration));
skew = Math.max(0.8, skew - 0.001);
confetti({
particleCount: 1,
startVelocity: 0,
ticks: ticks,
gravity: 0.5,
origin: {
x: Math.random(),
// since particles fall down, skew start toward the top
y: (Math.random() * skew) - 0.2
},
colors: ['#ffffff'],
shapes: ['circle']
});
if (timeLeft > 0) {
requestAnimationFrame(frame);
}
}());
},
continuous: function continuous() {
var end = Date.now() + (15 * 1000);
// go Buckeyes!
var colors = ['#bb0000', '#ffffff'];
(function frame() {
confetti({
particleCount: 2,
angle: 60,
spread: 55,
origin: { x: 0 },
colors: colors
});
confetti({
particleCount: 2,
angle: 120,
spread: 55,
origin: { x: 1 },
colors: colors
});
if (Date.now() < end) {
requestAnimationFrame(frame);
}
}());
},
custom: function() {
var canvas = document.getElementById('my-canvas');
// you should only initialize a canvas once, so save this function
// we'll save it to the canvas itself for the purpose of this demo
canvas.confetti = canvas.confetti || confetti.create(canvas, { resize: true });
canvas.confetti({
spread: 70,
origin: { y: 1.2 }
});
}
};
function auto(mode, count, time) {
count = count || 10;
var interval = setInterval(function () {
if (count--) {
return modes[mode]();
}
clearInterval(interval);
}, time || 200);
}
function pretty(val) {
return js_beautify(val, { indent_size: 2, brace_style: 'preserve-inline', });
}
function getCode(name) {
// pretty-print the code, since we will use minified code in production
var code = pretty(modes[name].toString());
// take out the function wrapper, trim all whitespace
code = code.split('\n').slice(1).slice(0, -1).map(function (s) {
return s.trim();
}).join('\n');
// pretty-print again
return pretty(code);
}
[].forEach.call(document.querySelectorAll('.group'), function (group) {
var name = group.getAttribute('data-name');
var button = group.querySelector('.run');
var codeElem = group.querySelector('.editor');
var editor = ace.edit(codeElem);
editor.setTheme('ace/theme/monokai');
editor.session.setMode('ace/mode/javascript');
editor.session.setUseSoftTabs(true);
editor.session.setTabSize(2);
editor.session.setValue(getCode(name));
var count = editor.session.getLength();
// set height so that all code is visible
codeElem.style.minHeight = (14 * count) + 1 + 'px';
codeElem.style.height = (count) + 'rem';
button.onclick = function (ev) {
// stop mobile browsers from zooming when clicking
// buttons repeatedly really fast
ev.preventDefault();
try {
eval(editor.getValue());
} catch (e) {
console.error(e);
}
};
});
</script>
<script src="/analytics.js"></script>
</body>
</html>