UPD. Как использовать сторонний js файл в VueJs?

Не знаю что там у sine-waves...

вот код:

spoiler

! function(a, b) { "use strict"; "function" == typeof define &&
"object" == typeof define.amd ? define([], function() { return b(a) })
: a.SineWaves = b(a) }(this, function() { "use strict";

    function a(a) {
        if (this.options = i.defaults(this.options, a), this.el = this.options.el, delete this.options.el, !this.el) throw "No Canvas Selected";
        if (this.ctx = this.el.getContext("2d"), this.waves = this.options.waves, delete this.options.waves, !this.waves || !this.waves.length) throw "No waves specified";
        this.dpr = window.devicePixelRatio || 1, this.updateDimensions(), window.addEventListener("resize", this.updateDimensions.bind(this)), this.setupUserFunctions(), this.easeFn = i.getFn(n, this.options.ease, "linear"), this.rotation = i.degreesToRadians(this.options.rotate), i.isType(this.options.running, "boolean") && (this.running = this.options.running), this.setupWaveFns(), this.loop()
    }

    function b(a, b) {
        return i.isType(a, "number") ? a : (a = a.toString(), a.indexOf("%") > -1 ? (a = parseFloat(a), a > 1 && (a /= 100), b * a) : a.indexOf("px") > -1 ? parseInt(a, 10) : void 0)
    }
    Function.prototype.bind || (Function.prototype.bind = function(a) {
        if ("function" != typeof this) throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
        var b = Array.prototype.slice.call(arguments, 1),
            c = this,
            d = function() {},
            e = function() {
                return c.apply(this instanceof d && a ? this : a, b.concat(Array.prototype.slice.call(arguments)))
            };
        return d.prototype = this.prototype, e.prototype = new d, e
    });
    for (var c = ["ms", "moz", "webkit", "o"], d = 0; d < c.length && !window.requestAnimationFrame; ++d) window.requestAnimationFrame = window[c[d] + "RequestAnimationFrame"], window.cancelAnimationFrame = window[c[d] + "CancelAnimationFrame"] || window[c[d] + "CancelRequestAnimationFrame"];
    if (!window.requestAnimationFrame) {
        var e = 0;
        window.requestAnimationFrame = function(a) {
            var b = (new Date).getTime(),
                c = Math.max(0, 16 - (b - e)),
                d = window.setTimeout(function() {
                    a(b + c)
                }, c);
            return e = b + c, d
        }
    }
    window.cancelAnimationFrame || (window.cancelAnimationFrame = function(a) {
        clearTimeout(a)
    });
    var f = Math.PI / 180,
        g = 2 * Math.PI,
        h = Math.PI / 2,
        i = {},
        j = i.isType = function(a, b) {
            var c = {}.toString.call(a).toLowerCase();
            return c === "[object " + b.toLowerCase() + "]"
        },
        k = i.isFunction = function(a) {
            return j(a, "function")
        },
        l = i.isString = function(a) {
            return j(a, "string")
        },
        m = (i.isNumber = function(a) {
            return j(a, "number")
        }, i.shallowClone = function(a) {
            var b = {};
            for (var c in a) a.hasOwnProperty(c) && (b[c] = a[c]);
            return b
        }),
        n = (i.defaults = function(a, b) {
            j(b, "object") || (b = {});
            var c = m(a);
            for (var d in b) b.hasOwnProperty(d) && (c[d] = b[d]);
            return c
        }, i.degreesToRadians = function(a) {
            if (!j(a, "number")) throw new TypeError("Degrees is not a number");
            return a * f
        }, i.getFn = function(a, b, c) {
            return k(b) ? b : l(b) && k(a[b.toLowerCase()]) ? a[b.toLowerCase()] : a[c]
        }, {});
    n.linear = function(a, b) {
        return b
    }, n.sinein = function(a, b) {
        return b * (Math.sin(a * Math.PI - h) + 1) * .5
    }, n.sineout = function(a, b) {
        return b * (Math.sin(a * Math.PI + h) + 1) * .5
    }, n.sineinout = function(a, b) {
        return b * (Math.sin(a * g - h) + 1) * .5
    };
    var o = {};
    o.sine = function(a) {
        return Math.sin(a)
    }, o.sin = o.sine, o.sign = function(a) {
        return a = +a, 0 === a || isNaN(a) ? a : a > 0 ? 1 : -1
    }, o.square = function(a) {
        return o.sign(Math.sin(a * g))
    }, o.sawtooth = function(a) {
        return 2 * (a - Math.floor(a + .5))
    }, o.triangle = function(a) {
        return Math.abs(o.sawtooth(a))
    }, a.prototype.options = {
        speed: 10,
        rotate: 0,
        ease: "Linear",
        wavesWidth: "95%"
    }, a.prototype.setupWaveFns = function() {
        for (var a = -1, b = this.waves.length; ++a < b;) this.waves[a].waveFn = i.getFn(o, this.waves[a].type, "sine")
    }, a.prototype.setupUserFunctions = function() {
        i.isFunction(this.options.resizeEvent) && (this.options.resizeEvent.call(this), window.addEventListener("resize", this.options.resizeEvent.bind(this))), i.isFunction(this.options.initialize) && this.options.initialize.call(this)
    };
    var p = {
        timeModifier: 1,
        amplitude: 50,
        wavelength: 50,
        segmentLength: 10,
        lineWidth: 1,
        strokeStyle: "rgba(255, 255, 255, 0.2)",
        type: "Sine"
    };
    return a.prototype.getDimension = function(a) {
        return i.isNumber(this.options[a]) ? this.options[a] : i.isFunction(this.options[a]) ? this.options[a].call(this, this.el) : "width" === a ? this.el.clientWidth : "height" === a ? this.el.clientHeight : void 0
    }, a.prototype.updateDimensions = function() {
        var a = this.getDimension("width"),
            c = this.getDimension("height");
        this.width = this.el.width = a * this.dpr, this.height = this.el.height = c * this.dpr, this.el.style.width = a + "px", this.el.style.height = c + "px", this.waveWidth = b(this.options.wavesWidth, this.width), this.waveLeft = (this.width - this.waveWidth) / 2, this.yAxis = this.height / 2
    }, a.prototype.clear = function() {
        this.ctx.clearRect(0, 0, this.width, this.height)
    }, a.prototype.time = 0, a.prototype.update = function(a) {
        this.time = this.time - .007, "undefined" == typeof a && (a = this.time);
        var b = -1,
            c = this.waves.length;
        for (this.clear(), this.ctx.save(), this.rotation > 0 && (this.ctx.translate(this.width / 2, this.height / 2), this.ctx.rotate(this.rotation), this.ctx.translate(-this.width / 2, -this.height / 2)); ++b < c;) {
            var d = this.waves[b].timeModifier || 1;
            this.drawWave(a * d, this.waves[b])
        }
        this.ctx.restore(), b = void 0, c = void 0
    }, a.prototype.getPoint = function(a, b, c) {
        var d = a * this.options.speed + (-this.yAxis + b) / c.wavelength,
            e = c.waveFn.call(this, d, o),
            f = this.easeFn.call(this, b / this.waveWidth, c.amplitude);
        return d = b + this.waveLeft, e = f * e + this.yAxis, {
            x: d,
            y: e
        }
    }, a.prototype.drawWave = function(a, b) {
        b = i.defaults(p, b), this.ctx.lineWidth = b.lineWidth * this.dpr, this.ctx.strokeStyle = b.strokeStyle, this.ctx.lineCap = "butt", this.ctx.lineJoin = "round", this.ctx.beginPath(), this.ctx.moveTo(0, this.yAxis), this.ctx.lineTo(this.waveLeft, this.yAxis);
        var c, d;
        for (c = 0; c < this.waveWidth; c += b.segmentLength) d = this.getPoint(a, c, b), this.ctx.lineTo(d.x, d.y), d = void 0;
        c = void 0, b = void 0, this.ctx.lineTo(this.width, this.yAxis), this.ctx.stroke()
    }, a.prototype.running = !0, a.prototype.loop = function() {
        this.running === !0 && this.update(), window.requestAnimationFrame(this.loop.bind(this))
    }, a.prototype.Waves = o, a.prototype.Ease = n, a
});

но походу обёртка в модуле криво написана, но у вас ошибка в компоненте

el: document(this.$refs.waves),

document это функция чтоле?

это моя попытка "понравится" Vue
на самом деле, в оригинале это выглядить так:el: document.getElementById('waves'),