fetch of multiple urls react code example

Example 1: react make multiple fetch requests one after another

/*
Fetch API requesting multiple get requests
*/

Promise.all([
  fetch("http://localhost:3000/items/get"),
  fetch("http://localhost:3000/contactlist/get"),
  fetch("http://localhost:3000/itemgroup/get")
]).then(([items, contactlist, itemgroup]) => {
    ReactDOM.render(
        <Test items={items} contactlist={contactlist} itemgroup={itemgroup} />,
        document.getElementById('overview');
    );
}).catch((err) => {
    console.log(err);
});

Example 2: fetch multiple urls javascript

async function getAllUrls(urls) {
    try {
        var data = await Promise.all(
            urls.map(
                url =>
                    fetch(url).then(
                        (response) => response.json()
                    )));

        return (data)

    } catch (error) {
        console.log(error)

        throw (error)
    }
}