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HTTP Methods - GET

HTTP defines a set of methods. We must choose one to use each time we make an HTTP request. The most common ones include:

GET
POST
PUT
DELETE

The GET method is used to "get" a representation of a specified resource. It doesn't take (remove) the data from the server but rather gets a representation, or copy, of the resource in its current state. A GET request is considered a safe method to call multiple times because it shouldn't alter the state of the server.

Making a GET Request Using the Fetch API

In this course, we have been and will continue to use the Fetch API to make HTTP requests. The fetch() method accepts an optional init object parameter as its second argument that we can use to define things like:

method: The HTTP method of the request, like GET.
headers: The headers to send.
mode: Used for security, we'll talk about this in future courses.
body: The body of the request. Often encoded as JSON.

Example GET request using fetch:

await fetch(url, {
  method: "GET",
  mode: "cors",
  headers: {
    "sec-ch-ua-platform": "macOS",
  },
});

Assignment

We need to write a reusable function that retrieves all of the Jello users from our server.

Complete the getUsers() function. It should:

Call fetch using the url parameter. The fetch call should:
1. Use the 'GET' Method
2. Use the 'cors' mode
3. Add an X-API-Key header with apiKey as the value
Return the resulting JSON data from the response

We've done this all before, but now you're writing it all from scratch!