Method initialize

resources/vega.min.js:14385–14391

(t, e, n)

        (this.dragleave = Nv([fv])));
    }
    initialize(t, e, n) {
      return (
        (this._canvas = t && nv(t, "canvas")),
        [bv, yv, dv, pv, gv, fv].forEach((t) => Tv(this, t)),
        super.initialize(t, e, n)
      );
    }
    canvas() {
      return this._canvas;
    }