<!DOCTYPE html><html> ???<head> ???<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> ????<title>Document</title> ????</head> <body> ????<script type="text/javascript"> ????????!function() { ???????????function o(w, v, i) { ???????????????return w.getAttribute(v) || i ???????????} ???????????function j(i) { ???????????????return document.getElementsByTagName(i) ???????????} ???????????function l() { ???????????????var i = j("script"), ???????????????w = i.length, ???????????????v = i[w - 1]; ???????????????return { ???????????????????l: w, ???????????????????z: o(v, "zIndex", -1), ???????????????????o: o(v, "opacity", 0.5), ???????????????????c: o(v, "color", "0,0,0"), ???????????????????n: o(v, "count", 99) ???????????????} ???????????} ???????????function k() { ???????????????r = u.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth, ???????????????n = u.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight ???????????} ???????????function b() { ???????????????e.clearRect(0, 0, r, n); ???????????????var w = [f].concat(t); ???????????????var x, v, A, B, z, y; ???????????????t.forEach(function(i) { ???????????????????i.x += i.xa, ???????????????????i.y += i.ya, ???????????????????i.xa *= i.x > r || i.x < 0 ? -1 : 1, ???????????????????i.ya *= i.y > n || i.y < 0 ? -1 : 1, ???????????????????e.fillRect(i.x - 0.5, i.y - 0.5, 1, 1); ???????????????????for (v = 0; v < w.length; v++) { ???????????????????????x = w[v]; ???????????????????????if (i !== x && null !== x.x && null !== x.y) { ???????????????????????????B = i.x - x.x, ???????????????????????????z = i.y - x.y, ???????????????????????????y = B * B + z * z; ???????????????????????????y < x.max && (x === f && y >= x.max / 2 && (i.x -= 0.03 * B, i.y -= 0.03 * z), A = (x.max - y) / x.max, e.beginPath(), e.lineWidth = A / 2, e.strokeStyle = "rgba(" + s.c + "," + (A + 0.2) + ")", e.moveTo(i.x, i.y), e.lineTo(x.x, x.y), e.stroke()) ???????????????????????} ???????????????????} ???????????????????w.splice(w.indexOf(i), 1) ???????????????}), ???????????????m(b) ???????????} ???????????var u = document.createElement("canvas"), ???????????s = l(), ???????????c = "c_n" + s.l, ???????????e = u.getContext("2d"), ???????????r, ???????????n, ???????????m = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || ???????????function(i) { ???????????????window.setTimeout(i, 1000 / 45) ???????????}, ???????????a = Math.random, ???????????f = { ???????????????x: null, ???????????????y: null, ???????????????max: 20000 ???????????}; ???????????u.id = c; ???????????u.style.cssText = "position:fixed;top:0;left:0;z-index:" + s.z + ";opacity:" + s.o; ???????????j("body")[0].appendChild(u); ???????????k(), ???????????window.onresize = k; ???????????window.onmousemove = function(i) { ???????????????i = i || window.event, ???????????????f.x = i.clientX, ???????????????f.y = i.clientY ???????????}, ???????????window.onmouseout = function() { ???????????????f.x = null, ???????????????f.y = null ???????????}; ???????????for (var t = [], p = 0; s.n > p; p++) { ???????????????var h = a() * r, ???????????????g = a() * n, ???????????????q = 2 * a() - 1, ???????????????d = 2 * a() - 1; ???????????????t.push({ ???????????????????x: h, ???????????????????y: g, ???????????????????xa: q, ???????????????????ya: d, ???????????????????max: 6000 ???????????????}) ???????????} ???????????setTimeout(function() { ???????????????b() ???????????}, 100) ???} (); ????</script> ??</body></html>有趣的js(鼠标特效)
原文地址：https://www.cnblogs.com/bunuo/p/9268423.html