Understanding Command and Query Responsibility Segregation in React

The Command and Query Responsibility Segregation (CQRS) principle (also known as the Separation of Command and Query Principle) is a software design principle that suggests that methods or functions should either be commands that modify the system’s state or queries that return information about the system’s state, but not both.

Commands (or modifiers) are methods that perform an action or change the state of an object without returning a value. Queries, on the other hand, are methods to read an object’s state without any changes. Separating commands and queries can help reduce coupling between components, making testing, maintaining, and modifying code easier. It also makes it easier to reason about the behavior of code and can improve the overall design of a system.

Although this pattern is widely used on a large scale, such as in designing the architecture of systems, it works well at...