In this React performance optimization tutorial, you will learn about React's shouldComponentUpdate lifecycle method and React's PureComponent API to a prevent rerender for React components. Usually React components and their child components rerender if state or props change. However, by using React's API, you can step in and make the decision…

The Intersection Observer API is a browser API which can be used to track the position of HTML elements in context to the actual viewport of the browser. The official documentation says: "The Intersection Observer API provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top…

In this chapter, you will implement server-side architecture using GraphQL and Apollo Server. The GraphQL query language is implemented as a reference implementation in JavaScript by Facebook, while Apollo Server builds on it to simplify building GraphQL servers in JavaScript. Since GraphQL is a query language, its transport layer and data format…

The concept of children as a function or child as a function , also called render prop in general, is one of the advanced patterns in React (next to higher-order components ). The components which implement this pattern could be called render prop components. In this tutorial, you will learn everything about React's render prop pattern…

Newcomers to React often start with applications that don't need data fetching at all. Usually they are confronted with simple applications. That's good, because data fetching adds another layer of complexity to your application while taking the first steps in React. However, at some point you want to request real world data from an own or a third…

Finding the right solution for a given problem is not always simple, and web applications build with GraphQL are a good example of how changing times make for constantly evolving challenges. Moreover, evolving challenges create a scenario where the solutions must also evolve, so even the number of choices becomes a task. This article will decipher…

When it comes to network requests between client and server applications, REST is one of the most popular choices to connect both worlds. In REST, everything evolves around the idea of having resources that are accessible by URLs. You can read a resource with a HTTP GET request, create a resource with a HTTP POST request, and update or delete it…

In a previous application, you have used Apollo Link State to substitute React's local state management with it. Even though it wasn't necessary, because it is most often sufficient to manage local state with React only, it has shown you how it can be achieved with local queries and local mutations when using Apollo Link State. However, it needs to…

You may have used a GraphQL client library that was view-layer agnostic and thus able to work with React or other solutions like Angular or Vue. Other GraphQL client libraries like Relay and Urql aren't so powerful, because they are used only for React. The next chapter is to illustrate how to implement a GraphQL client library that works with…