stream.opened

• 类型：<Promise>

如果流符合流量控制限制，则承诺会立即兑现，或者在待创建流时兑现。如果在创建之前关闭了带有错误的待创建流，则会被拒绝。

🌐 A promise that is immediately fulfilled, if the stream fits within flow control limits or fulfilled when the pending stream is created. It rejects, if a pending stream is closed with an error before being created.