What are interceptors in angular 4?

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Tags

1. #framework
2. #middleware
3. #frontend
4. #features
5. #really
6. #concept
7. #similar
8. #useful
9. #mutate
10. #responses
11. #incoming
12. #outgoing
13. #intercept
14. #mechanism
15. #logging
16. #caching
17. #express
18. #interceptors
19. #except
20. #requests
21. #provide