Method queueUpdate

packages/vite/src/shared/hmr.ts:252–262

* buffer multiple hot updates triggered by the same src change * so that they are invoked in the same order they were sent. * (otherwise the order may be inconsistent because of the http request round trip)

(payload: Update)

   * (otherwise the order may be inconsistent because of the http request round trip)
   */
  public async queueUpdate(payload: Update): Promise<void> {
    this.updateQueue.push(this.fetchUpdate(payload))
    if (!this.pendingUpdateQueue) {
      this.pendingUpdateQueue = true
      await Promise.resolve()
      this.pendingUpdateQueue = false
      const loading = [...this.updateQueue]
      this.updateQueue = []
      ;(await Promise.all(loading)).forEach((fn) => fn && fn())
    }
  }

  private async fetchUpdate(update: Update): Promise<(() => void) | undefined> {
    const { path, acceptedPath, firstInvalidatedBy } = update