WritableStreamDefaultWriter.closed
WritableStreamDefaultWriter 接口的只读属性 closed 返回一个 Promise，这个 promise 在流关闭时兑现，而在流抛出错误或者 writer 的锁被释放时拒绝。
值
一个 Promise。
示例
js
const writableStream = new WritableStream({
start(controller) {
},
write(chunk, controller) {
...
},
close(controller) {
...
},
abort(err) {
...
}
}, queuingStrategy);
...
const writer = writableStream.getWriter();
..
// check if the stream is closed
writer.closed.then(() => {
console.log('writer closed');
})
规范
| 规范 |
|---|
| Streams # ref-for-default-writer-closed② |