Relay: Efficiently Fetch Data in React Applications Treningskurs

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Kurskode

relay

Varighet

14 timer (vanligvis 2 dag inkludert pauser)

Krav

  • Experience developing applications with Javascript, HTML, and CSS
  • A general understanding of React application development
  • An understanding of database concepts

Oversikt

Relay is a JavaScript framework for building data-driven React applications. GraphQL is a data querying language for describing complex, nested data dependencies in modern applications. Together they allow an application's components to be moved anywhere in a render hierarchy without having to apply a cascade of modifications to parent components or to the server code which prepares the data payload. Relay is being used by Facebook in various mobile app projects.

In this instructor-led, live training, participants will learn how to apply key Relay concepts such as declarative specification of data dependencies, collocation and mutation to build a React application using Relay and GraphQL.

By the end of this training, participants will be able to:

  • Use Relay to compose data queries into efficient batches, provide each component with exactly the data that it requested, update the components when the data changes, and maintain a client-side store (cache) of all data.
  • Collocate queries and the view's code to more easily reason about a components functionality
  • Use GraphQL to declare data requirements while allowing Relay to fetch the data on its own
  • Understand the concept of mutating data on the client and server using GraphQL mutations
  • Understand the differences between Relay and Flux, in particular how "mutations" implement the concept of actions and modifications
  • Use routes to determine which data to fetch to render a given component
  • Make changes in relative isolation, even in large team projects
  • Create correct, high-performance applications in a straightforward and obvious way

Audience

  • Developers

Format of the course

  • Part lecture, part discussion, exercises and heavy hands-on practice

Kursplan

Introduction

Overview of Relay and GraphQL

Preparing the Development Environment

Preparing a Sample Application

Composing a Data Query

Collocating Queries

Declaring Data Requirements

Mutating data

Routing

Authenticating Users

Updating Data in Realtime

Implementing Pagination

Testing the Application

Debugging the Application

Deploying the Application

Troubleshooting

Summary and Conclusion

Testimonials

★★★★★
★★★★★

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