Method map

resources/vega-lite.min.js:5039–5047

(e, t)

  }
  class Ql extends rl {
    map(e, t) {
      const n = t.selections ?? [];
      if (e.params && !Ua(e)) {
        const t = [];
        for (const i of e.params) Ns(i) ? n.push(i) : t.push(i);
        e.params = t;
      }
      return ((t.selections = n), super.map(e, t));
    }
    mapUnit(e, n) {
      const i = n.selections;
      if (!i || !i.length) return e;