StackNavigator

StackNavigator is a core component within the React Navigation library, a popular navigation solution for React Native applications. Its primary function is to manage navigation between different screens in a stack-like manner. This means that when a user navigates to a new screen, it is placed on top of the previous screen, forming a stack. When the user navigates back, the current screen is removed from the top of the stack, revealing the screen beneath it.

The StackNavigator is configured using a navigator container and defining the screens that will be part of the stack. Each screen is associated with a unique name and a component that will be rendered for that screen. Navigation actions, such as pushing a new screen or popping the current screen, are performed using methods provided by the navigation prop, which is automatically passed to screen components. This push-and-pop behavior is fundamental to how users expect to move through hierarchical content in mobile applications. It enables features like back buttons in the header and smooth transitions between views. The StackNavigator is highly customizable, allowing developers to define custom transitions, header styles, and gestures.