RCT.12.04 Mid-levelCore — asked often

useLocalStorage, useMediaQuery, useOnlineStatus

Comes up in: React, Coding

This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.

What it covers

SSR-safe initial value
JSON parse errors
cross-tab storage event
useSyncExternalStore for browser APIs

Words you will know

—

What you will practise

implement 3 hooks

Interview questions this answers

Implement useLocalStorage that syncs across tabs.