html5制作一款超好看的点赞爱心气泡特效~

基于canvas点击圆形爱心按钮，喷出爱心气泡动画特效。这是一款点赞喜欢爱心特效。
css代码

html代码

	
	
		
	
	快来点赞吧

javascript代码

<script>
	class HeartsFlow {
		constructor(data) {
			this.el = document.querySelector(data.canvasEl);
			this.w = 200;
			this.h = 400;
			this.ctx = this.el.getContext('2d');
			this.colors = [
				'255, 137, 164', //'#FF89A4',
				'239, 121, 138', //'#EF798A',
				'255, 77, 128', //'#FF4D80',
				'249, 42, 130' //'#F92A82'
			];
			this.heartsAmount = data.amount;
			this.heartsList = [];
			this.isAnimate = false;
			this.raf = null;
			this.animate = this.animate.bind(this);
			this.paintHeart = this.paintHeart.bind(this);
			this.stopAnimation = this.stopAnimation.bind(this);
			this.init();
		}
		getRandomColor() {
			return this.colors[Math.floor(Math.random() * this.colors.length)];
		}
		getRandom(min, max) {
			return Math.floor(Math.random() * (max - min) + min);
		}
		setHeartsList() {
			let arr = [];
			for (let i = 0; i < this.heartsAmount; i++) {
				let currentSize = this.getRandom(10, 15);
				let dt = {
					x: this.w / 2,
					y: this.h,
					bx: this.w / 2,
					by: this.h,
					pos: this.h,
					_osp: this.getRandom(200, 400) / 100,
					osp: this.getRandom(11, 12) / 10,
					vsp: this.getRandom(currentSize, currentSize + i * 2) / 1000,
					size: currentSize,
					color: this.getRandomColor(),
					alfa: 1 };

				arr.push(dt);
			}
			this.heartsList = [...this.heartsList, ...arr];
		}
		getCoordinates({ x, y, size, color, bx, by, _osp, osp, vsp, pos, alfa }) {
			return {
				xst: x,
				yst: y + size / 2,
				x0: x - size / 1.4,
				y0: y + size / 4,
				x1: x - size / 1.3,
				y1: y - size / 1.3,
				_x0: x + size / 1.4,
				_y0: y + size / 4,
				_x1: x + size / 1.3,
				_y1: y - size / 1.3,
				xfn: x,
				yfn: y - size / 3,
				bx: bx,
				by: by,
				_osp: _osp,
				osp: osp,
				vsp: vsp,
				pos: pos,
				alfa: alfa,
				size: size,
				color: color };

		}
		paintHeart({ xst, yst, x0, y0, _x0, _y0, x1, y1, _x1, _y1, xfn, yfn, color, alfa }) {
			this.ctx.globalCompositeOperation = "lighter";
			this.ctx.beginPath();
			this.ctx.moveTo(xst, yst);
			this.ctx.bezierCurveTo(x0, y0, x1, y1, xfn, yfn);
			this.ctx.moveTo(xst, yst);
			this.ctx.bezierCurveTo(_x0, _y0, _x1, _y1, xfn, yfn);
			this.ctx.fillStyle = `rgba(${color}, ${alfa})`;
			this.ctx.strokeStyle = `rgba(${color}, ${alfa})`;
			this.ctx.fill();
			this.ctx.stroke();
			this.ctx.closePath();
		}
		mutateData() {
			this.heartsList = this.heartsList.map(item => {
				let pos = item.pos - 0.05;
				let x = item.x + Math.sin(pos * item._osp) * ((pos - item.by) / item.osp);
				let y = pos + (pos - item.by) / item.vsp * 1.6;
				let alfa = this.normalize0between1(0, this.h, y).toFixed(1);
				return {
					...item, x: x, y: y, pos: pos, alfa: alfa };

			});
			this.heartsList = this.heartsList.filter(item => item.y > 0);
		}
		normalize0between1(min, max, value) {
			return (value - min) / (max - min);
		}
		setCanvas() {
			this.el.width = this.w;
			this.el.height = this.h;
		}
		startAnimation() {
			if (!this.isAnimate) {
				this.isAnimate = true;
				console.log('start animation');
				this.setHeartsList();
				this.animate();
			} else {
				this.setHeartsList();
			}
		}
		stopAnimation() {
			this.isAnimate = false;
			console.log('stop animation');
			cancelAnimationFrame(this.raf);
		}
		animate() {

			this.ctx.clearRect(0, 0, this.w, this.h);

			if (this.isAnimate) {
				for (let i = 0, len = this.heartsList.length; i < len; i++) {
					let hrt = this.getCoordinates(this.heartsList[i]);
					this.paintHeart(hrt);
				}
				this.mutateData();
			}

			this.raf = requestAnimationFrame(this.animate);

			if (this.heartsList.length === 0 && this.isAnimate) {
				this.stopAnimation();
			}
		}
		init() {
			this.setCanvas();
			this.setHeartsList();
			this.animate();
		}}


	let ht = new HeartsFlow({
		canvasEl: '.hearts-canvas',
		amount: 20 });


	let btn = document.querySelector('.btn');

	btn.addEventListener('click', function () {
		ht.startAnimation();
	});
</script>