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JavaScript:asyncとawait 簡単なサンプル

Last updated at Posted at 2023-08-24

asyncとawaitのサンプル

下記のサンプルはMDNからコピーし、自分の理解をメモ

*方法:Promise を利用し、同期処理を非同期になる。
*戻り値:resolve('resolved'); で実現する。

async&await.js
function resolveAfter2Seconds() {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve('resolved');
    }, 2000);
  });
}

async function asyncCall() {
  console.log('calling');
  const result = await resolveAfter2Seconds();
  console.log(result);
  // Expected output: "resolved"
}

asyncCall();
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