Method on

packages/vite/src/node/server/hmr.ts:135–135

* Handle custom event emitted by `import.meta.hot.send`

(event: T, listener: HotChannelListener<T>)

   * Handle custom event emitted by `import.meta.hot.send`
   */
  on?<T extends string>(event: T, listener: HotChannelListener<T>): void
  on?(event: 'connection', listener: () => void): void
  /**
   * Unregister event listener