React Questions

Children prop is a prop that is used to pass children to a component.

createElement is used to create a new element and cloneElement is used to clone an existing element.

ReactJS has a lifecycle of three stages:

• Mounting
• Updating
• Unmounting

Mounting is the process of creating a native view and mounting it to the screen. 

Updating is the process of updating the native view. 

Unmounting is the process of removing the native view from the screen.

With React Hooks we can use useEffect and useState to manipulate and trigger these stages

Prop drilling is the term for passing data through several nested children components. It can cause issues with component reusability and app performance.

Context is a way to share data between components without having to pass props down the component tree.

Redux is a state management pattern. It helps you manage the application state, synchronizing the application's state between multiple parts of the application.

It has three main parts:

• Reducers: A function that returns the next state given the current state and an action to handle.
• Actions: An object that describes an event. It has a type property that defines the event, and a payload property that contains the data associated with the event.
• Store: A single source of truth for the application state. It is the only source of truth for the application state.

A stateless component is a component that does not maintain any state. It is a function that returns a React element.

A callback function is a function that is passed to another function as an argument. The callback function is then called inside the function that it is passed to.

The key property is used to uniquely identify each element in a list. It is used to optimize the rendering of the list.

Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, 

Babel is a toolchain that is mainly used to convert ECMAScript 2015+ code into a backwards compatible version of JavaScript in current and older browsers or environments.

• ReactJS main focus is Web Development
• ReactJS is a Javascript library
• React uses HTML tags like p,span,div, etc...
• React Native is focused on Mobile Development
• React Native is a mobile framework that uses Javascript Engine
• Both are open-source and supports the JSX syntax

A higher-order component is a function that takes a component and returns a new component.

Hooks allow you to write functions that can be used in React components. They are a way to write code in a modular and reusable way, using all the React features.

A functional component is a function that returns a React element. A class component is a class that extends React.Component.

An event is an action that can be triggered by a User or any System like pressing a key, or a mouse click.