async/await 實現一個sleep

使用async/await實現一個類似java中的thread.sleep()的函數

async function sleep(delay) {
    return new Promise((resolve) => setTimeout(resolve, delay));
}

async function foo() {
    const t0 = Date.now();
    await sleep(1500);

    console.log(Date.now() - t0);
}

foo();