Module Summary

This document summarizes the essential concepts of React components, including their types, state and props management, event handling, and the component lifecycle. It provides a structured overview of how these features enable modular and interactive user interfaces in React applications.

Module Summary

React Component Types

React components allow the user interface to be divided into reusable, independent parts. The main types are:

• Functional components: Simple functions that return JSX.
• Class components: JavaScript classes extending React.Component, supporting state and lifecycle methods.
• Higher-order components: Functions that take a component and return a new component.

State and Props

• State: A plain JavaScript object representing a component’s dynamic data. Changes in state trigger re-rendering.
• Props: Properties passed from parent to child components, enabling data flow and configuration.
• Components manage their own state but receive data from outside via props.

Event Handling

Event handling in React manages user interactions such as clicks, mouse events, and form submissions. Event handlers are passed as props or defined within components to update state or trigger actions.

Component Lifecycle

Each React component goes through three key phases:

• Mounting: Component is created and inserted into the DOM.
• Updating: Component re-renders due to state or prop changes.
• Unmounting: Component is removed from the DOM.

Lifecycle methods allow developers to control initialization, updates, and cleanup.

Conclusion

React’s component-based architecture, combined with state and props management, event handling, and lifecycle methods, provides a robust foundation for building scalable and maintainable user interfaces.

Glossary

Lab Activities

1. Lab activities are present in the module-lab section.