testing async/await in js

index.html

<script>
async function run() {
        let res = 0;
        for (let i = 0; i < 3; i++) {
                const response = await fetch('https://jsonplaceholder.typicode.com/todos/1');
                const json = await response.json();
                res += json.id;
        }
        console.log(res);
}
run();
</script>

<script>
async function run() {
        let res = 0;
        for (let i = 0; i < 3; i++) {
                const response = await fetch('https://jsonplaceholder.typicode.com/todos/1');
                const json = await response.json();
                res += json.id;
        }
        return res;
}
run().then(res => { console.log(res); });
</script>

<script>
let res = 0;
let promises = [];
for (let i = 0; i < 3; i++) {
        let promise = fetch('https://jsonplaceholder.typicode.com/todos/1').then(res => { return res.json(); }).then(data => {
                res += data.id;
        });
        promises.push(promise);
}
Promise.all(promises).then(() => {
        console.log(res);
});
</script>