/**
 * Bundled by jsDelivr using Rollup v2.79.1 and Terser v5.19.2.
 * Original file: /npm/lit-html@3.1.3/directives/repeat.js
 *
 * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
 */
/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
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/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */const L={ATTRIBUTE:1,CHILD:2,PROPERTY:3,BOOLEAN_ATTRIBUTE:4,EVENT:5,ELEMENT:6},D=t=>(...e)=>({_$litDirective$:t,values:e});class k{constructor(t){}get _$AU(){return this._$AM._$AU}_$AT(t,e,s){this._$Ct=t,this._$AM=e,this._$Ci=s}_$AS(t,e){return this.update(t,e)}update(t,e){return this.render(...e)}}
/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */const{I:O}=R,V=()=>document.createComment(""),W=(t,e,s)=>{const i=t._$AA.parentNode,n=void 0===e?t._$AB:e._$AA;if(void 0===s){const e=i.insertBefore(V(),n),o=i.insertBefore(V(),n);s=new O(e,o,t,t.options)}else{const e=s._$AB.nextSibling,o=s._$AM,r=o!==t;if(r){let e;s._$AQ?.(t),s._$AM=t,void 0!==s._$AP&&(e=t._$AU)!==o._$AU&&s._$AP(e)}if(e!==n||r){let t=s._$AA;for(;t!==e;){const e=t.nextSibling;i.insertBefore(t,n),t=e}}}return s},j=(t,e,s=t)=>(t._$AI(e,s),t),z={},F=(t,e=z)=>t._$AH=e,Z=t=>t._$AH,Q=t=>{t._$AP?.(!1,!0);let e=t._$AA;const s=t._$AB.nextSibling;for(;e!==s;){const t=e.nextSibling;e.remove(),e=t}};
/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */const Y=(t,e,s)=>{const i=new Map;for(let n=e;n<=s;n++)i.set(t[n],n);return i},q=D(class extends k{constructor(t){if(super(t),t.type!==L.CHILD)throw Error("repeat() can only be used in text expressions")}dt(t,e,s){let i;void 0===s?s=e:void 0!==e&&(i=e);const n=[],o=[];let r=0;for(const e of t)n[r]=i?i(e,r):r,o[r]=s(e,r),r++;return{values:o,keys:n}}render(t,e,s){return this.dt(t,e,s).values}update(t,[e,s,i]){const n=Z(t),{values:o,keys:r}=this.dt(e,s,i);if(!Array.isArray(n))return this.ut=r,o;const h=this.ut??=[],l=[];let $,A,_=0,c=n.length-1,a=0,d=o.length-1;for(;_<=c&&a<=d;)if(null===n[_])_++;else if(null===n[c])c--;else if(h[_]===r[a])l[a]=j(n[_],o[a]),_++,a++;else if(h[c]===r[d])l[d]=j(n[c],o[d]),c--,d--;else if(h[_]===r[d])l[d]=j(n[_],o[d]),W(t,l[d+1],n[_]),_++,d--;else if(h[c]===r[a])l[a]=j(n[c],o[a]),W(t,n[_],n[c]),c--,a++;else if(void 0===$&&($=Y(r,a,d),A=Y(h,_,c)),$.has(h[_]))if($.has(h[c])){const e=A.get(r[a]),s=void 0!==e?n[e]:null;if(null===s){const e=W(t,n[_]);j(e,o[a]),l[a]=e}else l[a]=j(s,o[a]),W(t,n[_],s),n[e]=null;a++}else Q(n[c]),c--;else Q(n[_]),_++;for(;a<=d;){const e=W(t,l[d+1]);j(e,o[a]),l[a++]=e}for(;_<=c;){const t=n[_++];null!==t&&Q(t)}return this.ut=r,F(t,l),m}});export{q as repeat};export default null;