伝えたいこと javascriptを触っていて嫌でも触らないといけないPromiseオブジェクトの返し方でreturn new Promise()とreturn Promise.resolve()の使い分け方法。 結論から言うと再帰関数を使用する際に明確な違いが生まれる。 以下コードと少し解説です。 const correct = 1 const generateRand = (digit) => { return Math.floor(Math.random() * digit) } const getCorrect = () => { return new Promise(resolve => { const delayTime = generateRand(1000) console.log(`delayTime: ${delayTime}ms`) setTimeout(() =>
![return new Promise()とreturn Promise.resolve()使い分け - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/03c1b4f6853024b00c82fb58ce5d4fbf541cec4e/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9cmV0dXJuJTIwbmV3JTIwUHJvbWlzZSUyOCUyOSVFMyU4MSVBOHJldHVybiUyMFByb21pc2UucmVzb2x2ZSUyOCUyOSVFNCVCRCVCRiVFMyU4MSU4NCVFNSU4OCU4NiVFMyU4MSU5MSZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9OTkxNDk0MWU5YzdlM2RlYjJlOWYwZGQzZTJlODVhYjQ%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBoZXkxeW91MSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9NTRkMDEyODE2YjAyNDI2YmY0ZjMwYTk2YzFmMzkzMzM%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3D3f2f64347a7e7dacfc37b00d01108d6f)