What is difference between AngularJS and Angularjs 4?

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Tags

1. #although
2. #compatible
3. #based
4. #backward
5. #major
6. #application
7. #there
8. #javascript
9. #rewrite
10. #dynamic
11. #development
12. #improvement
13. #angularjs
14. #between
15. #source
16. #framework
17. #complete
18. #angular
19. #front
20. #differences