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Web Development in React
Unit 1
Introduction to React
Understanding React and Its Importance
Setting Up the Development Environment
Unit 2
React Basics
JSX Deep Dive
Components and Props
State and Lifecycle
Unit 3
Advanced React Techniques
Handling Events in React
Conditional Rendering
Lists and Keys
Unit 4
State Management
Using Context API
Redux Essentials
Unit 5
Connecting to Back-End
Fetching Data with Axios
Using Firebase in React
Unit 6
Testing and Deployment
Unit Testing in React
Deployment Best Practices
;
Unit 3 • Chapter 3
Lists and Keys
Summary
Concept Check
What is the primary purpose of keys in Lists in React?
Identify elements uniquely
Improve rendering speed
Control input focus
List items style
Why should keys be unique in a React list?
Style elements differently
Make debugging easier
Enhance SEO performance
Avoid rendering issues
What can happen if list keys are not unique in React?
Increase app security
Crash the application
Faster rendering
Unexpected behaviours
In React, where should keys be assigned inside lists?
Closest to top level
Inside child components
Outside the list
At the deepest node
What does not require keys in React?
Mapped items
Components in loops
Dynamic lists
Static elements
Check Answer
Previous
Conditional Rendering