Shared Mutable State

ID: shared_state | Severity: Medium (default)

Identifies exported variables that are mutable (e.g., export let ... or export var ...).

Why this is a smell

Global or shared mutable state is a common source of bugs that are extremely hard to track down. It makes the behavior of a module unpredictable and dependent on the order of execution.

How to fix

• Use Const: Export only constants.
• Encapsulate: Use a class or a function to manage the state and provide controlled access via methods.
• Use a State Manager: If the state truly needs to be shared, use a proper state management library (Redux, Zustand, etc.).