Function createPreactPanel

packages/devtools-utils/src/preact/panel.tsx:25–58

(CoreClass: new () => TCoreDevtoolsClass)

 * ```
 */
export function createPreactPanel<
  TComponentProps extends DevtoolsPanelProps,
  TCoreDevtoolsClass extends {
    mount: (el: HTMLElement, props: TanStackDevtoolsPluginProps) => void
    unmount: () => void
  },
>(CoreClass: new () => TCoreDevtoolsClass) {
  function Panel(props: TComponentProps) {
    const devToolRef = useRef<HTMLDivElement>(null)
    const devtools = useRef<TCoreDevtoolsClass | null>(null)
    useEffect(() => {
      if (devtools.current) return
      devtools.current = new CoreClass()

      if (devToolRef.current) {
        devtools.current.mount(devToolRef.current, props)
      }

      return () => {
        if (devToolRef.current) {
          devtools.current?.unmount()
          devtools.current = null
        }
      }
    }, [props])

    return <div style={{ height: '100%' }} ref={devToolRef} />
  }

  function NoOpPanel(_props: TComponentProps) {
    return <></>
  }
  return [Panel, NoOpPanel] as const
}