This article discusses how to set up an Amplify app with Google Sign In using a React app frontend. This will also mention how to configure multiple redirect URIs per app.

The first section is dedicated to boilerplate setup with React, Github, Amplify, and the Google developer console, while the second is about adding auth.

/** Skip the setup step if you’ve created an app already, and move right to the heading Add auth to Amplify app */

Set up React and Amplify

On the command line

  • Create a react app with npx create-react-app google-test, cd into the app, and run npm start to start…


I wanted to display some code from one of my GitHub repos in a React app, and I wanted it to update automatically on the site when I pushed a new version.

I wanted this for a small component library I was making for myself, so I could see the latest version of the component from the repo. To accomplish this I used the GitHub API and the Prism syntax highlighting package.

  1. Add the GitHub client package and Prism for syntax highlighting.

I also added the axios library for making API calls.

npm i @octokit/rest react-prism axios

2. Authenticate to…


React-query is a gorgeous data fetching library that has received well-deserved praise. This article will detail patterns for a CRUD app, plus some bonus patterns.

The documentation for react-query is excellent, but I found myself wishing for more practical examples while learning it. These examples will assume some familiarity with react-query, such as with the useQuery hook, but not beyond the basics. This example app will be a note-writing tool like Evernote, and I’ll just outline data fetching cases.

Fetching data:

  1. Fetch data and handle results: useQueries.
  2. Fetch a subset of data using query strings or query params: useQuery with…


This article will review how to publish React components as an npm package with Babel 7 (the latest version at the time of writing) and common errors.

I found myself copy-pasting my React components from project to project and wanted to create an npm package so I could import them easily. To do that, I had to learn how to publish an npm package. It was hard to find much updated info online about publishing React components with Babel 7, and I was getting plenty of build errors, so I decided to write this as a reference. …


With a reusable hook and useRef

Detecting a click outside a React component is useful for closing dropdowns, modals, and dialogue boxes. It’s a common pattern that clicking outside the body of those components will close them:


This tutorial will walk through the steps for sending Draft.js data to a server using a POST request, and then how to retrieve and display that data using a GET request.

I’m using an Express backend, a MongoDB database, and a React frontend. This will assume some basic knowledge of Draft.js—there are a lot great setup guides out there.

Dependencies: react , axios , draft-js

Structure:

  • AddPost component with Draft.js Editor → useSubmit() hook to handle the POST request.
  • PostGallery component to display posts → usePosts() hook to handle fetching the posts.

First, make sure that you have an established…


Airtable is a spreadsheet app with a free, public API. That allows its spreadsheets to be read and written to from the browser, making it usable as a simple database. This article will show how to fetch, create, update, and delete data from Airtable. The API calls will be handled by Axios, the popular library for handling HTTP requests.

Dependencies:

npm i axios — the Axios library for calling Airtable from the browser

npm i airtable — the package for configuring an Airtable base in React

Steps covered:

  1. Set up an Airtable base.
  2. Authenticate the base in React.
  3. Fetch data…


The forwardRef hooks allows React users to pass refs to child components. The ref can be created and referenced with useRef or createRef and then passed in a parent component. Using forwardRef instead of useRef is useful when a ref needs to be accessed in a parent component.

Using forwardRef

Refs cannot be passed as props to functional components.

This will fail:

import React, {useRef} from 'react';//DON'T DO THIS
export function ParentComponent() {
const nodeRef = useRef(null);
return (
<ChildComponent ref={nodeRef}
)
}export function ChildComponent(props) {
return (
<div ref={props.nodeRef}>
<p>Don't pass refs like this</p>
</div>
)
}

This will…


This guide is a template to using JWT authentication in React with a MERN app. This code can be used as a template and adjusted as needed for React apps with JWT authentication. The full codebase is here.

This template is for storing user data in an HTTP-only cookie (not localStorage) and accessing the user’s JWT token through that cookie. We can’t read the cookie directly in the browser, so we will have to get the JWT info from the backend, using this recipe with React custom hooks, React frontend components, and a server calls:

  • React custom hook: The frontend…


To err is human, to create error handling middleware is divine. This article will explore how to catch and handle errors in Express using Mongoose and then display the errors to the end user using React.

All code used in this article is in this repo.

This diagram shows the modules we’ll discuss in the article. This app is using the MERN stack. The server is running through an Express app, and is connected to a MongoDB database. The frontend is a React app. These are the files we’ll be using for error validation:

JB

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