new WritableStream([underlyingSink[, strategy]])

underlyingSink <Object>

• start <Function> 创建 WritableStream 时立即调用的用户定义函数。

  ¥start <Function> A user-defined function that is invoked immediately when the WritableStream is created.

  • controller <WritableStreamDefaultController>

  • 返回：undefined 或用 undefined 实现的 promise。

    ¥Returns: undefined or a promise fulfilled with undefined.

• write <Function> 将数据块写入 WritableStream 时调用的用户定义函数。

  ¥write <Function> A user-defined function that is invoked when a chunk of data has been written to the WritableStream.

  • chunk <any>

  • controller <WritableStreamDefaultController>

  • 返回：undefined 兑现的 promise。

    ¥Returns: A promise fulfilled with undefined.

• close <Function> WritableStream 关闭时调用的用户定义函数。

  ¥close <Function> A user-defined function that is called when the WritableStream is closed.

  • 返回：undefined 兑现的 promise。

    ¥Returns: A promise fulfilled with undefined.

• abort <Function> 调用以突然关闭 WritableStream 的用户定义函数。

  ¥abort <Function> A user-defined function that is called to abruptly close the WritableStream.

  • reason <any>

  • 返回：undefined 兑现的 promise。

    ¥Returns: A promise fulfilled with undefined.

• type <any> type 选项保留供将来使用，必须未定义。

  ¥type <any> The type option is reserved for future use and must be undefined.

strategy <Object>

• highWaterMark <number> 应用背压之前的最大内部队列大小。

  ¥highWaterMark <number> The maximum internal queue size before backpressure is applied.

• size <Function> 一个用户定义的函数，用于标识每个数据块的大小。

  ¥size <Function> A user-defined function used to identify the size of each chunk of data.

  • chunk <any>

  • 返回：<number>

    ¥Returns: <number>