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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

How do you access DOM?

DOM manipulation is taken care of by the React library under the hood, without the need for any manual DOM updates. But sometimes, you might encounter use cases (focusing, scrolling to specific elements, and so on) to have DOM element access managed by React. As a solution to these use cases, refs have been introduced to access the DOM nodes.

A React interviewer might expect a good knowledge of DOM access and possible use cases, both of which cannot be handled through a traditional declarative approach.

What are refs? How do you create refs?

Ref is the shorthand for a reference to an element or a component. Refs are used to access DOM nodes or React elements that are created in the render method. The reference to the DOM element is available in the current attribute of the ref. In other words, refs are plain JavaScript objects with additional  current property. To understand this ref concept in a better way, let’s look at an example...

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