Method initialize

resources/vega.min.js:14626–14640

(t, e, n)

        })));
    }
    initialize(t, e, n) {
      let r = this._svg;
      return (
        r &&
          (r.removeEventListener(Fv, this._hrefHandler),
          r.removeEventListener(Dv, this._tooltipHandler),
          r.removeEventListener(Cv, this._tooltipHandler)),
        (this._svg = r = t && nv(t, "svg")),
        r &&
          (r.addEventListener(Fv, this._hrefHandler),
          r.addEventListener(Dv, this._tooltipHandler),
          r.addEventListener(Cv, this._tooltipHandler)),
        super.initialize(t, e, n)
      );
    }
    canvas() {
      return this._svg;
    }