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React Academy · Lesson

Global Overlay Manager (Context + Reducer)

Centralize overlays using Context + Reducer: a single store for modals/toasts with simple actions callable from anywhere.

Global Overlay Manager (Context + Reducer) is a free React Academy lesson on CoddyKit — lesson 2 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the React Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Why a global manager?

Goal: Control all overlays from one place.

  • Context exposes actions
  • Reducer manages state
  • Modals stack; toasts queue

Design rules

  • Keep a single store for overlays
  • Expose openModal/closeTop/showToast
  • Render layers via a Portal
  • Keep a11y basics: role="dialog", Escape/backdrop

Store: context + reducer

Create a tiny store: stacks for modals and toasts; simple actions.

<div id="root"></div>

Using the manager from components

Any component calls openModal / showToast; no prop drilling.

<div id="root"></div>

Stacking + Escape to close top

Support a stack: open another modal from inside; Escape closes the top.

<div id="root"></div>

Tips & checklist

  • Keep overlay state global
  • Expose tiny actions
  • Render layers with a Portal
  • Close top-most on Escape/backdrop

Overlay manager concept check

What is the main benefit of managing overlays with context + reducer?

Recap

Recap: A global overlay store (context + reducer) centralizes modals/toasts. Components dispatch actions; layers render via a portal; Escape/backdrop close the top.

Frequently asked questions

Is the “Global Overlay Manager (Context + Reducer)” lesson free?

Yes — the full text of “Global Overlay Manager (Context + Reducer)” is free to read here on the web, and the React Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the React Academy course, upgrade to CoddyKit PRO.

What will I learn in “Global Overlay Manager (Context + Reducer)”?

Centralize overlays using Context + Reducer: a single store for modals/toasts with simple actions callable from anywhere. You practise React Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start React Academy?

No prior experience is required. React Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 2 of 3, so you can start here or from the beginning and move at your own pace.

How long does the “Global Overlay Manager (Context + Reducer)” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this React Academy lesson?

Yes. Every React Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Portals, Focus Trap, Escape-to-Close
  2. Global Overlay Manager (Context + Reducer)
  3. Announcements for Accessibility (aria-live)
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