text: /**
   * @license
   * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
   * This code may only be used under the BSD style license found at
   * http://polymer.github.io/LICENSE.txt
   * The complete set of authors may be found at
   * http://polymer.github.io/AUTHORS.txt
   * The complete set of contributors may be found at
   * http://polymer.github.io/CONTRIBUTORS.txt
   * Code distributed by Google as part of the polymer project is also
   * subject to an additional IP rights grant found at
   * http://polymer.github.io/PATENTS.txt
   */
  import{render as e}from"./node_modules/lit-html/lib/shady-render.js";import{UpdatingElement as t}from"./lib/updating-element.js";export*from"./lib/updating-element.js";export*from"./lib/decorators.js";export{html,svg,TemplateResult,SVGTemplateResult}from"./node_modules/lit-html/lit-html.js";import{supportsAdoptingStyleSheets as s}from"./lib/css-tag.js";export*from"./lib/css-tag.js";(window.litElementVersions||(window.litElementVersions=[])).push("2.3.1");const o={};export class LitElement extends t{static getStyles(){return this.styles}static _getUniqueStyles(){if(this.hasOwnProperty(JSCompiler_renameProperty("_styles",this)))return;const e=this.getStyles();if(void 0===e)this._styles=[];else if(Array.isArray(e)){const addStyles=(e,t)=>e.reduceRight((e,t)=>Array.isArray(t)?addStyles(t,e):(e.add(t),e),t),t=addStyles(e,new Set),s=[];t.forEach(e=>s.unshift(e)),this._styles=s}else this._styles=[e]}initialize(){super.initialize(),this.constructor._getUniqueStyles(),this.renderRoot=this.createRenderRoot(),window.ShadowRoot&&this.renderRoot instanceof window.ShadowRoot&&this.adoptStyles()}createRenderRoot(){return this.attachShadow({mode:"open"})}adoptStyles(){const e=this.constructor._styles;0!==e.length&&(void 0===window.ShadyCSS||window.ShadyCSS.nativeShadow?s?this.renderRoot.adoptedStyleSheets=e.map(e=>e.styleSheet):this._needsShimAdoptedStyleSheets=!0:window.ShadyCSS.ScopingShim.prepareAdoptedCssText(e.map(e=>e.cssText),this.localName))}connectedCallback(){super.connectedCallback(),this.hasUpdated&&void 0!==window.ShadyCSS&&window.ShadyCSS.styleElement(this)}update(e){const t=this.render();super.update(e),t!==o&&this.constructor.render(t,this.renderRoot,{scopeName:this.localName,eventContext:this}),this._needsShimAdoptedStyleSheets&&(this._needsShimAdoptedStyleSheets=!1,this.constructor._styles.forEach(e=>{const t=document.createElement("style");t.textContent=e.cssText,this.renderRoot.appendChild(t)}))}render(){return o}}LitElement.finalized=!0,LitElement.render=e;