Q21. How to pass params to `history.push` method in React Router v4?
While navigating you can pass props to the `history` object: ```javascript this.props.history.push({ pathname: "/template", search: "?name=sudheer", state: { detail: resp...
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Q22. What is flux?
**Flux** is an **application architecture** (not a framework or library) designed by Facebook to manage **data flow** in React applications. It was created as an alternat...
Q23. What is Redux?
Redux is a predictable state container for JavaScript applications, most commonly used with React. It helps you manage and centralize your application’s state in a single...
Q24. What are the core principles of Redux?
Redux follows three fundamental principles: 1. **Single source of truth:** The state of your whole application is stored in an object tree within a single store. The sing...
Q25. What are the downsides of Redux compared to Flux?
While Redux offers a powerful and predictable state management solution, it comes with a few trade-offs when compared to Flux. These include: 1. **Immutability is essenti...
Q26. What is the difference between `mapStateToProps()` and `mapDispatchToProps()`?
`mapStateToProps()` is a utility which helps your component get updated state (which is updated by some other components): ```javascript const mapStateToProps = (state) =...
Q27. Can I dispatch an action in reducer?
Dispatching an action within a reducer is an **anti-pattern**. Your reducer should be _without side effects_, simply digesting the action payload and returning a new stat...
Q28. Are there any similarities between Redux and RxJS?
These libraries are very different for very different purposes, but there are some vague similarities. Redux is a tool for managing state throughout the application. It i...
Q29. How to reset state in Redux?
You need to write a _root reducer_ in your application which delegate handling the action to the reducer generated by `combineReducers()`. For example, let us take `rootR...
Q30. Why are Redux state functions called reducers?
Reducers always return the accumulation of the state (based on all previous and current actions). Therefore, they act as a reducer of state. Each time a Redux reducer is ...