Function fu

resources/vega-lite.min.js:6535–6544

(e)

    return !1 === i ? {} : { ...(i ? { aria: i } : {}), ...fu(e), ...du(e) };
  }
  function fu(e) {
    const { mark: n, markDef: i, config: r } = e;
    if (!1 === r.aria) return {};
    const o = En("ariaRoleDescription", i, r);
    return null != o
      ? { ariaRoleDescription: { value: o } }
      : t.hasOwnProperty(Fn, n)
        ? {}
        : { ariaRoleDescription: { value: n } };
  }
  function du(e) {
    const { encoding: t, markDef: n, config: i, stack: r } = e,
      o = t.description;