import { T as o } from "./lit-element-CICi5qXI.mjs";
/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
const a = { ATTRIBUTE: 1, CHILD: 2 }, d = (e) => (...t) => ({ _$litDirective$: e, values: t });
class c {
  constructor(t) {
  }
  get _$AU() {
    return this._$AM._$AU;
  }
  _$AT(t, n, r) {
    this._$Ct = t, this._$AM = n, this._$Ci = r;
  }
  _$AS(t, n) {
    return this.update(t, n);
  }
  update(t, n) {
    return this.render(...n);
  }
}
/**
 * @license
 * Copyright 2018 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
const l = d(class extends c {
  constructor(e) {
    var t;
    if (super(e), e.type !== a.ATTRIBUTE || e.name !== "class" || ((t = e.strings) == null ? void 0 : t.length) > 2) throw Error("`classMap()` can only be used in the `class` attribute and must be the only part in the attribute.");
  }
  render(e) {
    return " " + Object.keys(e).filter((t) => e[t]).join(" ") + " ";
  }
  update(e, [t]) {
    var r, i;
    if (this.st === void 0) {
      this.st = /* @__PURE__ */ new Set(), e.strings !== void 0 && (this.nt = new Set(e.strings.join(" ").split(/\s/).filter((s) => s !== "")));
      for (const s in t) t[s] && !((r = this.nt) != null && r.has(s)) && this.st.add(s);
      return this.render(t);
    }
    const n = e.element.classList;
    for (const s of this.st) s in t || (n.remove(s), this.st.delete(s));
    for (const s in t) {
      const h = !!t[s];
      h === this.st.has(s) || (i = this.nt) != null && i.has(s) || (h ? (n.add(s), this.st.add(s)) : (n.remove(s), this.st.delete(s)));
    }
    return o;
  }
});
export {
  d as a,
  l as e,
  c as i,
  a as t
};