Why Hydration Errors Plague SSR Apps and How to Fix Them

Hydration errors occur when server-rendered HTML doesn't match what the client-side JavaScript expects, often due to dynamic content like dates or browser-specific APIs. Common causes include timezone mismatches, accessing window/document on the server, and conditional rendering based on client-only data. Understanding these patterns helps developers debug and prevent mismatches in frameworks like React, Vue, or Angular.