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メモ: Promiseについて調べたまとめ

Posted at

Node.jswを勉強していたらPromiseに出会ったので少し調べてみたまとめ。

Promiseとはざっくり何

JavaScriptやNode.jsでの非同期処理の結果。

Promiseを使って嬉しいこと

Promiseを使った非同期処理のコールバック処理が書きやすくなる。

使ってみる

node.js
'use strict';

// fetch Promiseを返す
// HTTPリクエストを実行
fetch('https://api.football-data.org/v4/competitions/PL/matches')
// thenでコールバック処理を記述
.then((response) => response.json())
.then((data) => console.log(data));

参考文献

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