Stop Over-Engineering Your State Management
The Trap of the Global Store I spent three years of my career thinking that every single piece of data in a web application needed to live in a global store. Whether it was a user profile or whether a dropdown menu was open, it all went into Redux or Vuex. I thought I was being organized. In reality, I was creating a maintenance nightmare. When you put everything in a global store, you create…
The Risks of Placing All Data in a Single Global Store
The author spent years believing every piece of data in a web app should reside in a global store like Redux or Vuex. This mindset created invisible dependencies. Changing a value in one place caused unrelated components deep in the UI tree to re-render unnecessarily. Debugging this state flow consumed more time than feature development.
Applying the State Hierarchy Rule
To avoid these issues, the author adopted a simple rule: keep state close to where it's used. Local component state works for data used only by one component or its direct children, such as toggle switches, form inputs, and hover states. Moving a boolean flag like isModalOpen to a global store requires remembering to reset it manually when the component unmounts, risking unexpected modal pops when the page reloads.
For two sibling components needing the same data, lift the state one level higher. Pass the data as props down to the components and use a callback function to update it. While this might seem like prop drilling initially, it's more explicit and easier to trace for 2 or 3 levels compared to a global dispatcher.
For truly global data that rarely changes, like themes or authenticated user info, use the Context or Provider pattern. This avoids prop drilling but isn't a substitute for a state management library as it doesn't optimize for frequent updates. Avoid using a fast-changing timer in a Context provider, as it would trigger a re-render of the entire app every second.
When to Implement a Dedicated State Management Library
Only reach for a dedicated store (Zustand, Redux, Pinia) when dealing with complex data dependencies, such as a collaborative text editor or a dashboard where actions in different parts of the UI must instantly update various components. Managing server state (API responses) in a global store often leads to stale data bugs. Instead, use a caching layer or data-fetching hook.
The global store should only hold minimal data needed to coordinate the UI, not a mirror of the entire database. To decide if a piece of data belongs in the store, ask: "If I deleted this component, would anything else in the app break?" If no, the state belongs in the component. If yes, try using a simple Provider. If it's still too complex, then implement a full state management library.
The takeaway is to avoid defaulting to a global store. Start with local state, lift it up when needed, move to a Provider for repetition, and implement a full library only when facing a specific, complex data flow that can't be solved with built-in tools. This reduces code in the store, leading to fewer bugs and a faster application.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
