好看的蒲公英效果

蒲公英效果,快来尝试吧!


直接把下面的代码放到</body>上方就行了,试试看。

<script>
	! function() {
		function n(n, e, t) {
			return n.getAttribute(e) || t
		}
		function e(n) {
			return document.getElementsByTagName(n)
		}
		function t() {
			var t = e("script"),
				o = t.length,
				i = t[o - 1];
			return {
				l: o,
				z: n(i, "zIndex", -1),
				o: n(i, "opacity", .5),
				c: n(i, "color", "0,0,0"),
				n: n(i, "count", 99)
			}
		}
		function o() {
			a = m.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
			c = m.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
		}
		function i() {
			r.clearRect(0, 0, a, c);
			var n, e, t, o, m, l;
			s.forEach(function(i, x) {
					for(i.x += i.xa, i.y += i.ya, i.xa *= i.x > a || i.x < 0 ? -1 : 1, i.ya *= i.y > c || i.y < 0 ? -1 : 1, r.fillRect(i.x - .5, i.y - .5, 1, 1), e = x + 1; e < u.length; e++) n = u[e],
						null !== n.x && null !== n.y && (o = i.x - n.x, m = i.y - n.y,
							l = o * o + m * m, l < n.max && (n === y && l >= n.max / 2 && (i.x -= .03 * o, i.y -= .03 * m),
								t = (n.max - l) / n.max, r.beginPath(), r.lineWidth = t / 2, r.strokeStyle = "rgba(" + d.c + "," + (t + .2) + ")", r.moveTo(i.x, i.y), r.lineTo(n.x, n.y), r.stroke()))
				}),
				x(i)
		}
		var a, c, u, m = document.createElement("canvas"),
			d = t(),
			l = "c_n" + d.l,
			r = m.getContext("2d"),
			x = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame ||
			function(n) {
				window.setTimeout(n, 1e3 / 45)
			},
			w = Math.random,
			y = {
				x: null,
				y: null,
				max: 2e4
			};
		m.id = l, m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o, e("body")[0].appendChild(m), o(), window.οnresize = o,
			window.onmousemove = function(n) {
				n = n || window.event, y.x = n.clientX, y.y = n.clientY
			},
			window.onmouseout = function() {
				y.x = null, y.y = null
			};
		for(var s = [], f = 0; d.n > f; f++) {
			var h = w() * a,
				g = w() * c,
				v = 2 * w() - 1,
				p = 2 * w() - 1;
			s.push({
				x: h,
				y: g,
				xa: v,
				ya: p,
				max: 6e3
			})
		}
		u = s.concat([y]),
			setTimeout(function() {
				i()
			}, 100)
	}();
</script>


效果如下:


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