React versions before React18

React Versions Over the Years: Evolution and Major Changes

Introduction

React has witnessed significant growth and evolution since its initial release. In this blog post, we will take a journey through the various React versions over the years and explore the major changes in syntax and functionality. By understanding the evolution of React, you can stay up-to-date with the latest features and make informed decisions when developing React applications.

React 0.14

Major Changes

• Introduction of stateless functional components.
• Improved performance with pure components.
• Enforced strict mode for component declaration.

Example

    // React 0.14 Example
    import React from 'react';

    const MyComponent = () => {
      return (
        <div>
          <h1>Hello, React 0.14!</h1>
          <p>Welcome to the world of React 0.14.

        </div>
      );
    }

    export default MyComponent;
  

React 16

Major Changes

• Introduction of React Fiber, a new reconciliation algorithm for better performance.
• Support for error boundaries to handle errors within components.
• Enhanced server-side rendering capabilities.
• Introducing the Context API for managing global state.

Example

    // React 16 Example
    import React, { Component } from 'react';

    class MyComponent extends Component {
      render() {
        return (
          <div>
            <h1>Hello, React 16!</h1>
            <p>Welcome to the world of React 16.

          </div>
        );
      }
    }

    export default MyComponent;
  

React 17

Major Changes

• Improved React's compatibility with other JavaScript libraries.
• Optimized handling of event delegation.
• Updated behavior of event propagation.
• No major breaking changes, focused on gradual upgrades.

Example

    // React 17 Example
    import React from 'react';

    function MyComponent() {
      return (
        <div>
          <h1>Hello, React 17!</h1>
          <p>Welcome to the world of React 17.

        </div>
      );
    }

    export default MyComponent;
  

Conclusion

React has evolved over the years with each version introducing significant changes and improvements. By staying aware of the major updates and understanding the syntax changes, you can leverage the full potential of React and build high-quality user interfaces. It is essential to keep up with the latest version of React and explore the official documentation for more detailed information.