1. React.js ：
ReactJS 是一个 Javascript 库，于 2013 年与 Facebook 一起构建。它是一个主要为客户端开发而构建的开源库。它用于改进 UI 并增强客户端用户体验。 ReactJS 使用最广泛，因为它用于创建单页应用程序。
2.引导：
Bootstrap 是一个建立在 CSS 和 CSS3 之上的框架。 Bootstrap 用于使页面具有响应性。 Bootstrap 被广泛用于提高网站的响应能力，尽管还有其他框架用于此，但其中 Bootstrap 最广泛用于客户端的 Web 开发。
ReactJS 和 Bootstrap 的区别：
| S.No. | ReactJS | Bootstrap |
|---|---|---|
| 1. | It is based on pure vanilla Javascript. | It is based on CSS grid and flexbox properties for responsiveness. |
| 2. | It is used to improve the UI. | It is used to improve the responsiveness of the webpages. |
| 3. | Reactjs has inbuilt module of bootstrap i.e react-bootstrap that can be imported to use bootstrap in the HTML. | One can also link to the CDN or import its files to use bootstrap classes. |
| 4. | ReactJS deals with state and components. | While bootstrap deals with col and row size based on device width i.e sm, lg etc. |
| 5. | It is developed by Facebook and the community. | It is developed by Mark Otto and Jacob Thornton. |
| 6. | It was launched in 2013. | While it was launched in 2011. |
| 7. | The technology used in building of reactjs is javascript. | Technologies used are HTML, CSS, SASS and Javascript. |
| 8. | It is used to create single-page applications. | It is used to create mobile-first web applications. |