背景动态js代码，效果图可见本站
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js文件代码
代码语言：javascript复制!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.onresize = 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)
}();引用代码：
代码语言：javascript复制<script type="text/javascript" color="0,174,255" opacity='0.7' zIndex="-2" count="200" src="https://download.ccspump.com/js/bjtx.js"></script>
