The Difference Between Angular 2 and Angular 4

What is Angular?Angular is a platform that makes it easy to build applications with the web. Angular combines declarative templates, dependency injection, end to end tooling, and integrated best practices to solve development challenges. Angular empowers developers to build applications that live on the web, mobile, or the desktop.

Angular 2

Angular 2 was released at the end of 2015. Let’s take a look at why this version was released and what it added to web development.

This version of Angular was more focused on the development of mobile apps, as it allowed developers to create cross platform applications. The reason is that it is easier to handle the desktop component of things after the challenges connected to mobile apps (functionality, load time, etc.) have been addressed.

Numerous modules were eliminated out of Angular’s core, which led to better performance. These made their way to Angular’s ever-growing ecosystem of modules, which means that you have the ability to select and choose the components you want.

Angular 2.0 was aimed at ES6 and “evergreen” modern browsers (these automatically update to the most recent version). Building for these browsers means various hacks and workarounds that make Angular harder to develop can be eliminated, allowing developers to concentrate on the code linked to their company domain.

Some Important Features of Angular 2 are:

  • Modern, faster, and highly scalable framework
  • Equally useful framework for web, mobile, and desktop apps
  • Web components based architecture
  • Supports Hierarchical Dependency Injection

Angular 4

Angular 4 is unlike Angular 2 (which is completed rewritten version of Angular 1). There are in fact only few minor changes and new features added in it. Angular 4 supports TypeScript, which compiles to JavaScript and displays the same in the browser.

Some other features of Angular 4 are:

  • Reduce the size of the generated bundled code up to 60%
  • Animation moved out to a separated package @angular/animations
  • Supports for if/else statement
  • Supports for email validator

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