baidaStroe/src/assets/js/canvas-nest.min.js

// JavaScript Document
! 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", -2),
            o: o(v, "opacity", 0.8),
            c: o(v, "color", "255,255,255"),
            n: o(v, "count", 240)
        }
    }

    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() {
        delay = delay + 1;
        if( delay < 5 ) { m(b) } else { delay = 0;
            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, 2, 2);e.fillStyle="#FFFFFF";
                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"),
        delay = 0,
        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)
}();