What is React?
What is React and why use it?
React is a JavaScript library designed for building user interfaces (UI). It was created by Facebook in 2013 and is still widely used in both small and large-scale web applications. React's main goal is to simplify the creation of interactive and dynamic interfaces using a component-based approach.
React allows you to break down the UI into small, reusable pieces called components, which can manage their own state and update dynamically based on data.
1. Declarative Approach
2. Component-Based
3. Virtual DOM
4. One-way Data Binding
5. JSX (JavaScript + XML syntax)
These features make React simple, fast, and flexible.
// Imagine building UI as a function
function Welcome(props) {
return <h1>Hello, {props.name}!</h1>;
}
The declarative approach allows you to describe in writing what the UI should look like based on data, rather than how it should change in the DOM.
Advantages:
function App() {
return (
<div>
<Header />
<Main />
<Footer />
</div>
);
}
In React, everything is a component. You can create a small piece of UI as a function and then use it inside other components.
Advantages:
All this demonstrates React's strength for both simple applications and high-load systems.