There are probably quite a number of difference among angular js, and angular 2 angular 4. Based on the versions, architecture, syntax , routing and mobile support. Versions Angular js is a open source java script for the front end web app development for dynamic websites. It creates a readable and expressive environment which is quick to develop by extending HTML attributes and binding data. angular 2 is an open source typed end web application platform. It is a package for mobile apps and data management. angular 4 is the upgraded version and is a complete revise of angularjs. Architecture: the architecture of Angularjs is based on mvc design. it is a central component that manages the applications behavior data, rules,logic. Where as in angular2 it mvc is replaced with the directives and components. A component is a directive with a template.In angular4 ,the structural derivative ngFor and ngIF is improved. Expression /syntax : In AngularJS to bind...