Code được viết bằng ngôn ngữ HTML, CSS và Javascipt. Tuy nhiên, đã được gộp lại trong 1 file HTML duy nhất. Để mở và chạy code, các bạn copy và lưu trong Notepad để đuôi HTML.
Full code đây nhé mọi người:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Heart </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<style>
html,
body {
height: 100%;
padding: 0;
margin: 0;
background: #000;
display: flex;
justify-content: center;
align-items: center;
}
.box {
width: 100%;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
display: flex;
flex-direction: column;
}
canvas {
position: absolute;
width: 100%;
height: 100%;
}
#pinkboard {
position: relative;
margin: auto;
height: 500px;
width: 500px;
animation: animate 1.3s infinite;
}
#pinkboard:before,
#pinkboard:after {
content: '';
position: absolute;
background: red;
width: 100px;
height: 160px;
border-top-left-radius: 50px;
border-top-right-radius: 50px;
}
#pinkboard:before {
left: 100px;
transform: rotate(-45deg);
transform-origin: 0 100%;
box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25),
0 10px 10px rgba(0, 0, 0, 0.22);
}
#pinkboard:after {
left: 0;
transform: rotate(45deg);
transform-origin: 100% 100%;
}
@keyframes animate {
0% {
transform: scale(1);
}
30% {
transform: scale(.8);
}
60% {
transform: scale(1.2);
}
100% {
transform: scale(1);
}
}
</style>
</HEAD>
<BODY>
<div class="box">
<canvas id="pinkboard"></canvas>
</div>
<script>
/*
* Settings
*/
var a = 1
var settings = {
pas: {
length: 2000,
duration: 2,
velocity: 50,
effect: -3,
size: 10,
},
};
/*
* RequestAnimationFrame polyfill by Erik Möller
*/
(function () {var b = 0; var c = ["ms", "moz", "webkit", "o"]; for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) {window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; window.cancelAnimationFrame = window[c[a] + "CancelAnimationFrame"] || window[c[a] + "CancelRequestAnimationFrame"]} if (!window.requestAnimationFrame) {window.requestAnimationFrame = function (h, e) {var d = new Date().getTime(); var f = Math.max(0, 16 - (d - b)); var g = window.setTimeout(function () {h(d + f)}, f); b = d + f; return g}} if (!window.cancelAnimationFrame) {window.cancelAnimationFrame = function (d) {clearTimeout(d)}} }());
/*
* Point class
*/
var Point = (function () {
function Point(x, y) {
this.x = (typeof x !== 'undefined') ? x : 0;
this.y = (typeof y !== 'undefined') ? y : 0;
}
Point.prototype.clone = function () {
return new Point(this.x, this.y);
};
Point.prototype.length = function (length) {
if (typeof length == 'undefined')
return Math.sqrt(this.x * this.x + this.y * this.y);
this.normalize();
this.x *= length;
this.y *= length;
return this;
};
Point.prototype.normalize = function () {
var length = this.length();
this.x /= length;
this.y /= length;
return this;
};
return Point;
})();
/*
* Pa class
*/
var Pa = (function () {
function Pa() {
this.position = new Point();
this.velocity = new Point();
this.acceleration = new Point();
this.age = 0;
}
Pa.prototype.initialize = function (x, y, dx, dy) {
this.position.x = x;
this.position.y = y;
this.velocity.x = dx;
this.velocity.y = dy;
this.acceleration.x = dx * settings.pas.effect;
this.acceleration.y = dy * settings.pas.effect;
this.age = 0;
};
Pa.prototype.update = function (deltaTime) {
this.position.x += this.velocity.x * deltaTime;
this.position.y += this.velocity.y * deltaTime;
this.velocity.x += this.acceleration.x * deltaTime;
this.velocity.y += this.acceleration.y * deltaTime;
this.age += deltaTime;
};
Pa.prototype.draw = function (context, image) {
function ease(t) {
return (--t) * t * t + 1;
}
var size = image.width * ease(this.age / settings.pas.duration);
context.globalAlpha = 1 - this.age / settings.pas.duration;
context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);
};
return Pa;
})();
var PaPool = (function () {
var pas,
firstActive = 0,
firstFree = 0,
duration = settings.pas.duration;
function PaPool(length) {
// create and populate pa pool
pas = new Array(length);
for (var i = 0; i < pas.length; i++)
pas[i] = new Pa();
}
PaPool.prototype.add = function (x, y, dx, dy) {
pas[firstFree].initialize(x, y, dx, dy);
// handle circular queue
firstFree++;
if (firstFree == pas.length) firstFree = 0;
if (firstActive == firstFree) firstActive++;
if (firstActive == pas.length) firstActive = 0;
};
PaPool.prototype.update = function (deltaTime) {
var i;
// update active pas
if (firstActive < firstFree) {
for (i = firstActive; i < firstFree; i++)
pas[i].update(deltaTime);
}
if (firstFree < firstActive) {
for (i = firstActive; i < pas.length; i++)
pas[i].update(deltaTime);
for (i = 0; i < firstFree; i++)
pas[i].update(deltaTime);
}
// remove inactive pas
while (pas[firstActive].age >= duration && firstActive != firstFree) {
firstActive++;
if (firstActive == pas.length) firstActive = 0;
}
};
PaPool.prototype.draw = function (context, image) {
// draw active pas
if (firstActive < firstFree) {
for (i = firstActive; i < firstFree; i++)
pas[i].draw(context, image);
}
if (firstFree < firstActive) {
for (i = firstActive; i < pas.length; i++)
pas[i].draw(context, image);
for (i = 0; i < firstFree; i++)
pas[i].draw(context, image);
}
};
return PaPool;
})();
/*
* Putting it all together
*/
(function (canvas) {
var context = canvas.getContext('2d'),
pas = new PaPool(settings.pas.length),
paRate = settings.pas.length / settings.pas.duration, // pas/sec
time;
// get point on heart with -PI <= t <= PI
function pointOnHeart(t) {
return new Point(
160 * Math.pow(Math.sin(t), 3),
130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
);
}
var image = (function () {
var canvas = document.createElement('canvas'),
context = canvas.getContext('2d');
canvas.width = settings.pas.size;
canvas.height = settings.pas.size;
function to(t) {
var point = pointOnHeart(t);
point.x = settings.pas.size / 2 + point.x * settings.pas.size / 350;
point.y = settings.pas.size / 2 - point.y * settings.pas.size / 350;
return point;
}
context.beginPath();
var t = -Math.PI;
var point = to(t);
context.moveTo(point.x, point.y);
while (t < Math.PI) {
t += 0.01;
point = to(t);
context.lineTo(point.x, point.y);
}
context.closePath();
context.fillStyle = '#e81017';
context.fill();
var image = new Image();
image.src = canvas.toDataURL();
return image;
})();
// render that thing!
function render() {
// next animation frame
requestAnimationFrame(render);
// update time
var newTime = new Date().getTime() / 1000,
deltaTime = newTime - (time || newTime);
time = newTime;
// clear canvas
context.clearRect(0, 0, canvas.width, canvas.height);
// create new pas
var amount = paRate * deltaTime;
for (var i = 0; i < amount; i++) {
var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
var dir = pos.clone().length(settings.pas.velocity);
pas.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);
}
// update and draw pas
pas.update(deltaTime);
pas.draw(context, image);
}
// handle (re-)sizing of the canvas
function onResize() {
canvas.width = canvas.clientWidth;
canvas.height = canvas.clientHeight;
}
window.onresize = onResize;
// delay rendering bootstrap
setTimeout(function () {
onResize();
render();
}, 10);
})(document.getElementById('pinkboard'));
</script>
</BODY>
</HTML>
Lanus Coder 