Method enqueue

packages/vite/src/shared/hmrHandler.ts:19–28

(promise: () => Promise<void>)

  private pending = false

  enqueue(promise: () => Promise<void>): Promise<void> {
    return new Promise<any>((resolve, reject) => {
      this.queue.push({
        promise,
        resolve,
        reject,
      })
      this.dequeue()
    })
  }

  dequeue(): boolean {
    if (this.pending) {