Function zo

resources/vega-lite.min.js:2052–2061

(e, t, n)

      : { signal: `isValid(${l}) ? ${l} : ""+${l}` };
  }
  function zo(e, t, n) {
    return Zo(e)
      ? n
        ? `${ma(e, { expr: t, suffix: "end" })}-${ma(e, { expr: t, suffix: "start" })}`
        : ma(e, { expr: t })
      : (function (e) {
          const { datum: t } = e;
          return Di(t) ? Pi(t) : `${Q(t)}`;
        })(e);
  }
  function Co(e) {
    let {
      fieldOrDatumDef: t,