1. css property: position-area: span-block-start

2. css property: position-area: span-inline-start

3. css property: position-area: span-self-block-start

4. css property: position-area: span-self-inline-start

5. css property: position-area: span-self-start

6. css property: position-area: span-self-x-start

7. css property: position-area: span-self-y-start

8. css property: position-area: span-start

9. css property: position-area: span-x-start

10. css property: position-area: span-y-start

11. css property: position-try-fallbacks: span-block-start

12. css property: position-try-fallbacks: span-inline-start

13. css property: position-try-fallbacks: span-self-block-start

14. css property: position-try-fallbacks: span-self-inline-start

15. css property: position-try-fallbacks: span-self-start

16. css property: position-try-fallbacks: span-self-x-start

17. css property: position-try-fallbacks: span-self-y-start

18. css property: position-try-fallbacks: span-start

19. css property: position-try-fallbacks: span-x-start

20. css property: position-try-fallbacks: span-y-start

21. css property: position-try: span-block-start

22. css property: position-try: span-inline-start

23. css property: position-try: span-self-block-start

24. css property: position-try: span-self-inline-start

25. css property: position-try: span-self-start

26. css property: position-try: span-self-x-start

27. css property: position-try: span-self-y-start

28. css property: position-try: span-start

29. css property: position-try: span-x-start

30. css property: position-try: span-y-start