What is react js :
React is a declarative, efficient, and flexible JavaScript library for building user interfaces. It lets you create reusable components so that your code is easy to read and maintain.
React is a popular choice for building user interfaces because it is declarative and efficient. It is also easy to learn and use.
What is React Component:
React can be used with a variety of other JavaScript libraries. React components are a great way to reuse code. React components are a declarative and composable way to describe your UI. React components can be used with other libraries that manage state or make AJAX requests.
A Good Example about React Component:
What is props and state in React :
In React, props and state are used to create components. Props are used to pass data to components, and state is used to store data within components. React components can be either stateless or stateful. Stateless components are components that do not have any state. Stateful components are components that have state.
React Component that will make your life easier:
When it comes to front-end development, React is one of the most popular frameworks. And, when it comes to React, one of the most important things to know are the React components. In this article, we're going to take a look at React components that will make your life easier. Trust us, once you start using these components, you'll never go back to the old way of doing things. So, without further ado, let's get started. React-router If you're looking for a comprehensive routing solution for your React application, look no further than React-router. This React component will make adding routes to your application a breeze.
React components are modular and self-contained pieces of code that can be reused in your React apps. There are two types of components: class components and functional components. Class components are JavaScript classes that extend React.Component and can have state and lifecycle hooks. Functional components are JavaScript functions that take props as an argument and return a React element. React components are powerful because they abstract away the DOM, making your code more declarative and easier to reason about. React components can also be reused across your app, which makes building large-scale apps easier. There are a few important things to know about React components: -They accept props, which are data that is passed to them from their parent.
Component 's lifecycle methods :
Components in ReactJS have a lifecycle that they go through as they are created, updated, and removed. The lifecycle of a component is divided into three stages: mounting, updating, and unmounting. Mounting occurs when the component is first generated and inserted into the DOM. This is the phase in which the component's initial props and state are set. During this phase, the componentWillMount and componentDidMount methods are invoked. When the props or state of a component are modified, this is referred to as updating. This can happen when the component is originally built (if the props or state are set externally) or when the component is modified (if the props or state are set externally).
Conclusion:
At the conclusion. A React component is a standalone piece of functionality that may be reused across many React applications. You must import the React package and create a class that extends React Component when creating a new React component. This class will include a render() method that returns a React element that describes what should be displayed on the screen. You may use your React component in your application after you've constructed it by executing ReactDOM.render (). This will display your React element on the page. Props can be used to pass data into your React component if necessary. Props are similar to arguments passed into a function.