Breaking Down the GET Fetch Request in React

To illustrate, I’ll breakdown how I use a GET request to pull data into my Daily Journal App in React from my local json server.

Let’s break this down. In useState I set my initial state to an empty array. Then I name my state variable postData and my updater function setPostData. Now my component is stateful and can pass data to the setPostData updater function to store it in the postData variable.

I found that if I tried to call my GET request without using the Effect Hook, the GET request would be called twice, presumably once after the component rendered and then again when the control flow reached the GET request. This would create a bug publishing a duplicate of all data to the page.

Now that I have a successful response from the server, it’s time to render the data to the page. Because I stored the data in the State variable postData, I can traverse across the data array by calling the .map() method on postData.

Please feel free to leave comments, thoughts and recommendations below. Thanks!

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