What problems does React solve?

Complexity of state management in large applications: React offers components and hooks (such as useState, useReducer) that simplify data management and changes, making state predictable and easy to debug.

Low rendering performance: React uses a virtual DOM and a diffing algorithm to minimize direct manipulations of the real DOM. This significantly improves performance during updates, as React updates only the necessary parts of the page.

Need for manual DOM updates: React automatically updates the DOM when the state or props change, freeing developers from manual element management.

Difficulty in reusing UI elements: React's component architecture allows breaking down the UI into small, self-sufficient parts that are easy to reuse in different parts of the application or even in different projects.

Challenges in creating interactive UIs: React's reactive approach (updating UI based on data changes) simplifies the creation of dynamic and interactive user interfaces, allowing easy responses to user actions or data changes.

Support for cross-platform development: React Native enables using React knowledge to create mobile applications for iOS and Android, solving the problem of separate development for each platform.