const bases = [ customElements.whenDefined("home-assistant-main"), customElements.whenDefined("hui-view"), ]; Promise.race(bases).then(() => { const LitElement = customElements.get("home-assistant-main") ? Object.getPrototypeOf(customElements.get("home-assistant-main")) : Object.getPrototypeOf(customElements.get("hui-view")); const html = LitElement.prototype.html; const css = LitElement.prototype.css; class BrowserPlayerEditor extends LitElement { setConfig(config) {} render() { return html`