<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.4.0/Rx.js"></script>
const promiseReject = () =>
new Promise((resolve, reject) => reject("reject!!"));
const observable = Rx.Observable.from(promiseReject());
observable
// このメソッドを実行した Observable(`observable`)が`error`を通知した際に、
// Observable を生成する関数(`error => Rx.Observable.of(error)`)を実行し、
// その戻り値である Observable(`Rx.Observable.of(error)`)から通知を再開する。
.catch(error => Rx.Observable.of(error))
.subscribe(
x => console.log(`next: ${x}`),
error => console.error(`error: ${error}`),
() => console.log("complete")
);
// 今回`catch`で生成した Observable(`Rx.Observable.of(error)`)から`next`通知が
// 再開されるため、以下がコンソール出力される。
// => "next: reject!!"
// => "complete"
// 再開した Observable が通知を正常にできたので、Observer に`error`通知はされない。
Output
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