1.角度2：
Angular 2 是 Angular JS 的后续版本，它是 Google 的 Angular 团队对 AngularJS 的完全重写。这不是典型的更新，但它与 AngularJS 完全不同。 Angular 2 是用于构建 Web 应用程序的开源前端 Web 开发框架，具有强大的功能和支持。
2. ReactJS：
ReactJS 是一个声明性、动态和可扩展的 JavaScript 库，用于构建应用程序的前端或用户界面。它是一个开源的、基于组件的前端库，只负责Web应用和移动应用的视图层。它由 Facebook 提供和管理。
Angular 2 和 ReactJS 的区别：
| S.No. | Angular 2 | ReactJS |
|---|---|---|
| 1. | It was released in September 2016. | It was released in May 2013. |
| 2. | It is an open source framework. | It is a JavaScript based library. |
| 3. | It is written using TypeScript. | It is written in JavaScript. |
| 4. | It provides full MVC functionality. | It is responsible for the view layer of web application. |
| 5. | Angular provides templates approach for dynamic HTML, which makes application functional easy. | In ReactJS, HTML is implemented through javascript whch makes it confusing. |
| 6. | Debugging is difficult in Angular 2 as compared to ReactJS. | Debugging is easy in ReactJS as compared to Angular 2. |
| 7. | It provides two-way data binding i.e., data flows in both way. | It provides one-way data binding i.e., data flows in one way. |
| 8. | It is well scalable and determine fixed boundaries. | It is not scalable and does not determine any boundaries. |
| 9. | Optimization of code is less flexible in Angular 2. | While code optimization is highly flexible in ReactJS. |