Let’s explain how we'd build the same todo application as a Single Page Application (SPA) using React.js, focusing on data and state management. Let's start

with a high-level overview and then dive into the details.

First, let's visualize the structure of our React SPA todo app:

graph TD A[App Component] --> B[TodoList Component] A --> C[AddTodo Component] B --> D[TodoItem Component] D --> E[Edit Todo] D --> F[Delete Todo] D --> G[Toggle Complete]

H[State Management] --> A H --> B H --> C H --> D

In this React SPA structure, we have a main App component that contains child components for different parts of our application.…