text: /*
   * Copyright 2020 Google LLC
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /**
   * @fileoverview A component for managing a Material navigation rail.
   */
  import {BaseElement} from './base-element';
  
  export class NavigationRail extends BaseElement {
    constructor() {
      super();
      this.onClose = this.onClose.bind(this);
    }
  
    connectedCallback() {
      this.closeBtn = this.querySelector('.navigation-rail__close');
      this.closeBtn?.addEventListener('click', this.onClose);
    }
  
    disconnectedCallback() {
      this.closeBtn?.removeEventListener('click', this.onClose);
    }
  
    onClose() {
      this.dispatchEvent(new Event('navigation-rail-collapse', {bubbles: true}));
    }
  }
  
  customElements.define('navigation-rail', NavigationRail);
  