What is JS Controllers?

JS Controllers, often associated with Model-View-Controller (MVC) or similar architectural patterns in web development, are JavaScript components that manage the interaction between the Model (data) and the View (user interface). They handle user input, update the model accordingly, and refresh the view to reflect changes. In frameworks like AngularJS, controllers are explicit components, while in others they are implicit. They enhance application structure, maintainability, and testability by separating concerns.