Don't Sleep on AbortController

Once you create a controller instance, you get two things: The signal property, which is an instance of AbortSignal. This is a pluggable part you can provide to any API to react to an abort event, and implement it accordingly. For example, providing it to a fetch() request will abort the request; The .abort() method that, when called, triggers the abort event on the signal. It also updates the sig

[efcl]

`AbortController`の使い方について。 イベントリスナーの解除、Fetchのキャンセル、`AbortSignal.timeout`/`AbortSignal.any`について。 また汎用的なキャンセルの実装についてなど

[mkusaka]

`AbortController`でabort可能にする方法を解説。`signal`でイベント/`fetch`/ストリームを一括キャンセルし、timeout/anyも紹介。