canvas-nest.js

!function () {
    "use strict";

    function e(e) {
        return e && e.__esModule && Object.prototype.hasOwnProperty.call(e, "default") ? e.default : e
    }

    function t(e, t) {
        return e(t = {exports: {}}, t.exports), t.exports
    }

    var n = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0});
        var n = 1;
        t.default = function () {
            return "" + n++
        }, e.exports = t.default
    });
    e(n);
    var o = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0}), t.default = function (e) {
            var t = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : 30, n = null;
            return function () {
                for (var o = this, i = arguments.length, r = Array(i), a = 0; a < i; a++) r[a] = arguments[a];
                clearTimeout(n), n = setTimeout(function () {
                    e.apply(o, r)
                }, t)
            }
        }, e.exports = t.default
    });
    e(o);
    var i = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0});
        t.SizeSensorId = "size-sensor-id", t.SensorStyle = "display:block;position:absolute;top:0;left:0;height:100%;width:100%;overflow:hidden;pointer-events:none;z-index:-1;opacity:0", t.SensorClassName = "size-sensor-object"
    });
    e(i);
    i.SizeSensorId, i.SensorStyle, i.SensorClassName;
    var r = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0}), t.createSensor = void 0;
        var n, r = (n = o) && n.__esModule ? n : {default: n};
        t.createSensor = function (e) {
            var t = void 0, n = [], o = (0, r.default)(function () {
                n.forEach(function (t) {
                    t(e)
                })
            }), a = function () {
                t && t.parentNode && (t.contentDocument.defaultView.removeEventListener("resize", o), t.parentNode.removeChild(t), t = void 0, n = [])
            };
            return {
                element: e, bind: function (r) {
                    t || (t = function () {
                        "static" === getComputedStyle(e).position && (e.style.position = "relative");
                        var t = document.createElement("object");
                        return t.onload = function () {
                            t.contentDocument.defaultView.addEventListener("resize", o), o()
                        }, t.setAttribute("style", i.SensorStyle), t.setAttribute("class", i.SensorClassName), t.type = "text/html", e.appendChild(t), t.data = "about:blank", t
                    }()), -1 === n.indexOf(r) && n.push(r)
                }, destroy: a, unbind: function (e) {
                    var o = n.indexOf(e);
                    -1 !== o && n.splice(o, 1), 0 === n.length && t && a()
                }
            }
        }
    });
    e(r);
    r.createSensor;
    var a = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0}), t.createSensor = void 0;
        var n, i = (n = o) && n.__esModule ? n : {default: n};
        t.createSensor = function (e) {
            var t = void 0, n = [], o = (0, i.default)(function () {
                n.forEach(function (t) {
                    t(e)
                })
            }), r = function () {
                t.disconnect(), n = [], t = void 0
            };
            return {
                element: e, bind: function (i) {
                    t || (t = function () {
                        var t = new ResizeObserver(o);
                        return t.observe(e), o(), t
                    }()), -1 === n.indexOf(i) && n.push(i)
                }, destroy: r, unbind: function (e) {
                    var o = n.indexOf(e);
                    -1 !== o && n.splice(o, 1), 0 === n.length && t && r()
                }
            }
        }
    });
    e(a);
    a.createSensor;
    var s = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0}), t.createSensor = void 0;
        t.createSensor = "undefined" != typeof ResizeObserver ? a.createSensor : r.createSensor
    });
    e(s);
    s.createSensor;
    var u = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0}), t.removeSensor = t.getSensor = void 0;
        var o, r = (o = n) && o.__esModule ? o : {default: o};
        var a = {};
        t.getSensor = function (e) {
            var t = e.getAttribute(i.SizeSensorId);
            if (t && a[t]) return a[t];
            var n = (0, r.default)();
            e.setAttribute(i.SizeSensorId, n);
            var o = (0, s.createSensor)(e);
            return a[n] = o, o
        }, t.removeSensor = function (e) {
            var t = e.element.getAttribute(i.SizeSensorId);
            e.element.removeAttribute(i.SizeSensorId), e.destroy(), t && a[t] && delete a[t]
        }
    });
    e(u);
    u.removeSensor, u.getSensor;
    var c = t(function (e, t) {
        Object.defineProperty(t, "__esModule", {value: !0}), t.clear = t.bind = void 0;
        t.bind = function (e, t) {
            var n = (0, u.getSensor)(e);
            return n.bind(t), function () {
                n.unbind(t)
            }
        }, t.clear = function (e) {
            var t = (0, u.getSensor)(e);
            (0, u.removeSensor)(t)
        }
    });
    e(c);
    var l = c.clear, d = c.bind,
        v = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.msRequestAnimationFrame || window.oRequestAnimationFrame || function (e) {
            return window.setTimeout(e, 1e3 / 60)
        },
        f = window.cancelAnimationFrame || window.webkitCancelAnimationFrame || window.mozCancelAnimationFrame || window.msCancelAnimationFrame || window.oCancelAnimationFrame || window.clearTimeout,
        m = function (e) {
            return new Array(e).fill(0).map(function (e, t) {
                return t
            })
        }, h = Object.assign || function (e) {
            for (var t = 1; t < arguments.length; t++) {
                var n = arguments[t];
                for (var o in n) Object.prototype.hasOwnProperty.call(n, o) && (e[o] = n[o])
            }
            return e
        }, y = function () {
            function e(e, t) {
                for (var n = 0; n < t.length; n++) {
                    var o = t[n];
                    o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, o.key, o)
                }
            }

            return function (t, n, o) {
                return n && e(t.prototype, n), o && e(t, o), t
            }
        }();
    var p, w;
    new (function () {
        function e(t, n) {
            var o = this;
            !function (e, t) {
                if (!(e instanceof t)) throw new TypeError("Cannot call a class as a function")
            }(this, e), this.randomPoints = function () {
                return m(o.c.count).map(function () {
                    return {
                        x: Math.random() * o.canvas.width,
                        y: Math.random() * o.canvas.height,
                        xa: 2 * Math.random() - 1,
                        ya: 2 * Math.random() - 1,
                        max: 6e3
                    }
                })
            }, this.el = t, this.c = h({
                zIndex: -1,
                opacity: .5,
                color: "0,0,0",
                count: 99
            }, n), this.canvas = this.newCanvas(), this.context = this.canvas.getContext("2d"), this.points = this.randomPoints(), this.current = {
                x: null,
                y: null,
                max: 2e4
            }, this.all = this.points.concat([this.current]), this.bindEvent(), this.requestFrame(this.drawCanvas)
        }

        return y(e, [{
            key: "bindEvent", value: function () {
                var e = this;
                d(this.el, function () {
                    e.canvas.width = e.el.clientWidth, e.canvas.height = e.el.clientHeight
                }), this.onmousemove = window.onmousemove, window.onmousemove = function (t) {
                    e.current.x = t.clientX - e.el.offsetLeft, e.current.y = t.clientY - e.el.offsetTop, e.onmousemove && e.onmousemove(t)
                }, this.onmouseout = window.onmouseout, window.onmouseout = function () {
                    e.current.x = null, e.current.y = null, e.onmouseout && e.onmouseout()
                }
            }
        }, {
            key: "newCanvas", value: function () {
                "static" === getComputedStyle(this.el).position && (this.el.style.position = "relative");
                var e, t = document.createElement("canvas");
                return t.style.cssText = "display:block;position:absolute;top:0;left:0;height:100%;width:100%;overflow:hidden;pointer-events:none;z-index:" + (e = this.c).zIndex + ";opacity:" + e.opacity, t.width = this.el.clientWidth, t.height = this.el.clientHeight, this.el.appendChild(t), t
            }
        }, {
            key: "requestFrame", value: function (e) {
                var t = this;
                this.tid = v(function () {
                    return e.call(t)
                })
            }
        }, {
            key: "drawCanvas", value: function () {
                var e = this, t = this.context, n = this.canvas.width, o = this.canvas.height, i = this.current,
                    r = this.points, a = this.all;
                t.clearRect(0, 0, n, o);
                var s = void 0, u = void 0, c = void 0, l = void 0, d = void 0, v = void 0;
                r.forEach(function (r, f) {
                    for (r.x += r.xa, r.y += r.ya, r.xa *= r.x > n || r.x < 0 ? -1 : 1, r.ya *= r.y > o || r.y < 0 ? -1 : 1, t.fillRect(r.x - .5, r.y - .5, 1, 1), u = f + 1; u < a.length; u++) null !== (s = a[u]).x && null !== s.y && (l = r.x - s.x, d = r.y - s.y, (v = l * l + d * d) < s.max && (s === i && v >= s.max / 2 && (r.x -= .03 * l, r.y -= .03 * d), c = (s.max - v) / s.max, t.beginPath(), t.lineWidth = c / 2, t.strokeStyle = "rgba(" + e.c.color + "," + (c + .2) + ")", t.moveTo(r.x, r.y), t.lineTo(s.x, s.y), t.stroke()))
                }), this.requestFrame(this.drawCanvas)
            }
        }, {
            key: "destroy", value: function () {
                l(this.el), window.onmousemove = this.onmousemove, window.onmouseout = this.onmouseout, f(this.tid), this.canvas.parentNode.removeChild(this.canvas)
            }
        }]), e
    }())(document.body, (p = document.getElementsByTagName("script"), {
        zIndex: (w = p[p.length - 1]).getAttribute("zIndex"),
        opacity: w.getAttribute("opacity"),
        color: w.getAttribute("color"),
        count: Number(w.getAttribute("count")) || 99
    }))
}();