Hot Reload

Definitions

1. Updating running application code without a full restart, preserving application state. Hot Module Replacement (HMR) in Vite/webpack patches changed modules in-place while keeping React component state, form inputs, and scroll position. Hot reload in Flutter and SwiftUI works similarly for mobile development. Dramatically speeds up the edit→see cycle.

   In plain English: Updating code in a running app without restarting it, so you instantly see changes without losing your place.

   Example: "Change a CSS value and Vite's HMR updates it in 20ms — no page reload, no lost form state, no re-navigation."

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