Which jQuery function prevents code from running?

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1. #should
2. #whole
3. #jquery
4. #window
5. #refers
6. #three
7. #there
8. #document
9. #question
10. #presented
11. #which
12. #worded
13. #finished
14. #loading
15. #before
16. #prevent
17. #function
18. #running
19. #correct
20. #answer