🔴 Get my Complete Frontend Interview Prep course - https://roadsidecoder.com/course-details #JavascriptInterview #ReactInterview #ReactJS React Interview Question on building the Polyfill of useMemo Hook or its custom implementation will be created in this video along with tips and tricks to tackle your React JS and JavaScript Questions in Frontend Machine Coding Interviews. ➡️ Book an Interview Preparation call with me ( 20% OFF for limited time ) - https://topmate.io/roadsidecoder 👤 Join the RoadsideCoder Community Discord - https://discord.gg/2ecgDwx5EE 🟪 Follow me on Instagram and u will clear your interview 🤓 - https://www.instagram.com/roadsidecoder/ 🔗 Complete Data Structures and Algorithms with JS Course -   • Data Structures and Algorithms in Jav...   ➡️ Source Code - https://github.com/piyush-eon/frontend-interview-questions/tree/master/reactjs-interview-questions 🔗 Frontend Machine Coding Interview Series -    • Frontend Machine Coding Interview Que...   🔗 JS Interview Series - https://www.youtube.com/watch?v=oUWRxJ19gfE 🔗 Cars24 Interview Experience - https://www.youtube.com/watch?v=vxggZffOqek 🔗 Unacademy Interview Experience - https://www.youtube.com/watch?v=abbdJ4Yfm54 🔗 Tazorpay Interview Experience - https://www.youtube.com/watch?v=q-ylRxSxGcY 🔗 MERN Stack Tutorial with Redux - https://www.youtube.com/watch?v=IQXjO0t4XRM 🔗 React Beginner's Project Tutorials -    • React JS Beginners Project   ------------------------------------------------------------------------- 00:00 Intro 00:36 What is useMemo Hook? 01:05 Initialise a new React App 01:26 Simple Counter App Example 04:35 useMemo Hook Example 06:40 Book a 1:1 Call with me 07:00 Custom useMemo Hook Implementation 08:39 Cache Memory for our Hook 10:19 Comparing new and old dependencies 14:21 Unmount / Cleanup Logic 15:48 Using useMemo Polyfill in our App 16:02 Testing our Hook ------------------------------------------------------------------------- ⭐ Support the channel - null Special Thanks to our members -