Why you shouldn’t use global variables in Flutter

Global variables, while initially appealing in Flutter programs for their accessibility across functions, are often criticized for their drawbacks, including complex code maintenance, difficult testing, and poor encapsulation. Their use can lead to challenges such as spaghetti code, where changes to a global variable necessitate widespread refactoring and impede effective unit testing and debugging. These variables undermine the object-oriented programming principle of encapsulation, making it difficult to maintain and scale applications. To address these issues, the text suggests using state management solutions like Provider, GetX, Riverpod, and Redux, which offer more structured and manageable ways to handle application state without the drawbacks associated with global variables. These tools enhance maintainability and scalability by promoting separation of concerns and reducing the complexity associated with global state management.