Not exactly - it’s more about the sequence of how issues cascade and affect each other. Here’s a better way to think about it:

  • Client/Server Boundaries (Most Fundamental)

  • Must be correctly defined first

  • Determines where code runs

  • Affects everything else downstream

  • Example: “use client” directive placement

  • Hydration Process (Core React Mechanism)

  • Connects server-rendered HTML with client-side JavaScript

  • Must match exactly between server and client

  • If this fails, React might “give up” on parts of the app

  • Example: Server renders one state, client expects another

  • State Management (Application Logic)

  • Relies on proper hydration

  • Manages component lifecycle

  • Controls re-renders

  • Example: useState, useEffect timing

  • Event Handlers (Interactive Layer)

  • Depends on successful hydration

  • Requires proper state management

  • Handles user interactions

  • Example: onClick, onSubmit handlers

  • Third-Party Integration (External Layer)

  • Should be loaded after core app functionality

  • Can interfere with any of the above

  • Often requires special handling

  • Example: External scripts, APIs

The Mailchimp component likely had issues starting at level 1 or 2, which then cascaded down and affected everything else. It’s not about importance, but rather about the dependency chain - each layer needs the previous ones to work correctly.

So the hiearchy of producing a good code will be

the code files it self the relationship the consistency of what we want the interactivity be

then the above