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React Interview Guide

React Interview Guide

By : Sudheer Jonna, Andrew Baisden
4.3 (6)
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React Interview Guide

React Interview Guide

4.3 (6)
By: Sudheer Jonna, Andrew Baisden

Overview of this book

Are you struggling with React job interviews, feeling hindered by the lack of knowledge or confidence? Look no further than the React Interview Guide. Complete with the latest features of the React library, this comprehensive solution will assist you in taking a definitive step forward in your career as a React developer. This book systematically covers frequently asked questions and common edge cases encountered in React interviews. It goes beyond React to encompass other essential technologies in the React ecosystem, including routing, CSS, testing, and building Next.js apps. You’ll benefit from invaluable expert guidance, enabling you to address a wide range of React ecosystem questions swiftly as this book prioritizes interview readiness, sparing you the need to dwell excessively on individual topics before technical discussions. By the end of this book, you’ll be thoroughly equipped to excel in any React interview, giving you an edge over your peers and significantly increasing your chances of securing your dream job.
Table of Contents (19 chapters)
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1
Part 1: Getting Ready for Interviews
3
Part 2: Mastering the Core React Technical Interview
8
Part 3: Going Beyond React and Advanced Topics
13
Part 4: Hands-On with Programming Tasks

Exploring portals

Nowadays, it is quite common to use model windows or popups on web pages to quickly grab the user’s attention. They help notify the user of some important information or ask the user to enter their input. But the implementation of these widgets is challenging in large apps since it involves writing complex CSS code and handling the DOM hierarchy. Fortunately, React provides the portals feature to solve these kinds of use cases.

Portals were introduced in 2017 and were first seen in React version 16. They are used to render React components outside of the DOM hierarchy. The usage of portals is not typical, but they are helpful in specific use cases, as you will see in the following subsections.

What are portals? How do you create them?

React portals allow you to render children into a DOM node that exists outside of the parent DOM hierarchy. Even though you render a child component outside the parent, the parent-child relationship still exists between...

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