Frameworks are pre-written pieces of code that make up a set of frameworks and packaged programming libraries. They provide built-in features like mockups, APIs, and other elements to simplify the development of rich, dynamic web applications. The frameworks are like we have a pre-made house frame with the basic foundation, you just need to build and interior as you like.

Types of Frameworks
Currently, there are many frameworks for backend, front end, mobile applications... the most popular are probably web frameworks and frameworks for mobile.

Web application frameworks are software frameworks used to streamline web applications and develop websites, web services, and web resources. A common type of web application framework is the Model-View-Controller (MVC) architecture. As we all know to program a website we use up to 3 component languages ​​HTML, CSS and Javascript then combine with a server scripting language like PHP, ASP.NET, JAVA... with each component. In this section we have different frameworks.

The framework for mobile apps makes it possible to write code once and run it on iOS and Android. That is its strength to reduce product development time compared to native code. Currently, these frameworks mostly use Javascript as a prominent development language such as Facebook's React Native, in addition, there are Microsoft's Xamarin using C#, Flutter using Google's Dart language.