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React Academy · Lesson

Dev/Prod Builds, Source Maps, Envs

Understand dev vs prod builds, what source maps are for, and how env values guide behavior (e.g., API URL, debug).

Why builds, maps, envs?

Goal: Know the difference between development and production builds, the role of source maps, and basic env usage.

  • Dev: fast feedback, verbose
  • Prod: optimized, quiet
  • Source maps: debug original code

Snapshot of terms

  • Dev build: HMR/hot reload, clear errors
  • Prod build: minified, dead-code removed
  • Source map: link minified output to sources
  • Env: configure API URL, flags

All lessons in this course

  1. Dev/Prod Builds, Source Maps, Envs
  2. Bundle Analysis & Trimming Unused Code
  3. Basic CI: Lint → Test → Build
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