connectedCallback() {
    this.input = this.shadowRoot.querySelector('input[type="checkbox"]');
    this.labelEl = this.shadowRoot.querySelector('label');

    this.#attachEventHandlers();
    super.connectedCallback();
  }
/**
   * Custom Element `connectedCallback` implementation
   * @returns {void}
   */
Custom Element `connectedCallback` implementation
@returns {void}
Custom Element ` connectedCallback ` implementation @returns { void }
connectedCallback() {
    this.input = this.shadowRoot.querySelector('input[type="checkbox"]');
    this.labelEl = this.shadowRoot.querySelector('label');
    this.#attachEventHandlers();
    super.connectedCallback();
  }
connectedCallback ( ) { this . input = this . shadowRoot . querySelector ( 'input[type="checkbox"]' ) ; this . labelEl = this . shadowRoot . querySelector ( 'label' ) ; this . #attachEventHandlers ( ) ; super . connectedCallback ( ) ; }
Custom Element `connectedCallback` implementation
 @returns {void}
Custom Element ` connectedCallback ` implementation @returns { void }