async/await, Promiseの実行順序 ref: https://qiita.com/kurogelee/items/21042b3c0a523bd90e5d

await.ts

const log = console.log;

async function f0() {
    return "ZZZ";
}
async function f1() {
    await f0();
    return "XXX";
}

log(1);
new Promise(async (resolve) => {
    resolve();
    log(2);
    await f0();
    // await f1();
    log(3);
}).then((value) => {
    log(4);
});
(async () => {
    log(5);
    await f0();
    // await f1();
    log(6);
})();
log(7);

実行結果

1
2
5
7
4
3
6