Course Introduction

GraphQL is becoming the new way to use APIs in modern web and mobile apps. GraphQL is strongly typed. Using typed language like Typescript or ReScript along with GraphQL will help us build end-to-end type safe applications which are less error prone.

In this course we will learn how to integrate GraphQL into ReScript React applications.

We will explore the fundamentals of GraphQL and the things that make GraphQL especially suitable for modern applications, like its realtime capabilities! The course is light on opinions so that once you grok the fundamentals you can go on to choose your favorite libraries, tools and tailor your workflow.

Key topics and takeaways:

GraphQL vs REST
GraphQL queries, mutations, subscriptions
Setting up a Apollo GraphQL client in ReScript React app
Integrating GraphQL queries in your ReScript React app
Integrating GraphQL mutations with query variables to handle form input
Updating local state after a GraphQL mutation (form input) using Apollo cache
Optimistic updates to local state and UI after GraphQL mutations for a slick UX
Integrating subscriptions in ReScript React app
Building a real-time feed with notifications using mutations and subscriptions

What will we be building?

We will be building a realtime todo app using authenticated GraphQL APIs.

Try this deployed version of the app to see what we'll be building: https://learn-hasura-todo-app.netlify.com/

Will this course teach React and ReScript concepts as well?

No, we will be simulating a scenario where we already have a GraphQL API and the basic UI of a ReScript React app built. Our task in this scenario is to integrate the GraphQL APIs into our ReScript React app to build a complete and working app.

If you're new to React and ReScript, we recommend going through the official docs of React and ReScript and then coming back here!