async/await 实现一个sleep

使用async/await实现一个类似java中的thread.sleep()的函数

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();