tencent cloud

// 使用 TransformStream 构造得到 WritableStream 对象
const { writable } = new TransformStream();

// writable.locked 
readonly locked: boolean;

// writable.highWaterMark
readonly highWaterMark: number;

writable.getWriter(): WritableStreamDefaultWriter;

writable.close(): Promise<void>;

writable.abort(reason?: string): Promise<string>;