javascript multiple fetch one after another 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: how to make multiple fetch requests

Promise.all([
	fetch('https://jsonplaceholder.typicode.com/posts'),
	fetch('https://jsonplaceholder.typicode.com/users')
]).then(function (responses) {
	// Get a JSON object from each of the responses
	return Promise.all(responses.map(function (response) {
		return response.json();
	}));
}).then(function (data) {
	// Log the data to the console
	// You would do something with both sets of data here
	console.log(data);
}).catch(function (error) {
	// if there's an error, log it
	console.log(error);
});