1. cssimportrule api: href

2. htmlanchorelement api: href

3. htmlanchorelement api: hreflang

4. htmlanchorelement api: hreftranslate

5. htmlareaelement api: href

6. htmlbaseelement api: href

7. htmlbaseelement api: href: `data:` and `javascript:` urls are not allowed

8. htmlbaseelement api: href: tab, newline, and < are not allowed (dangling markup prevention)

9. htmllinkelement api: href

10. htmllinkelement api: hreflang

11. location api: href

12. stylesheet api: href

13. svgaelement api: href

14. svgaelement api: hreflang

15. svgfeimageelement api: href

16. svgfilterelement api: href

17. svgimageelement api: href

18. svgmpathelement api: href

19. svgpatternelement api: href

20. svgscriptelement api: href

21. svguseelement api: href

22. url api: href

23. workerlocation api: href

24. html element: area: href

25. html element: a: href

26. html element: a: hreflang

27. html element: a: hreftranslate

28. html element: base: href

29. html element: base: href: `data:` and `javascript:` urls are not allowed

30. html element: base: href: relative uris.

31. html element: hr

32. html element: hr: align

33. html element: hr: color

34. html element: hr: noshade

35. html element: hr: size

36. html element: hr: width

37. html element: link: href

38. html element: link: hreflang

39. svg element: animate: href

40. svg element: a: href

41. svg element: a: hreflang

42. svg element: feimage: href

43. svg element: image: href

44. svg element: mpath: href

45. svg element: pattern: href

46. svg element: script: href

47. svg element: set: href

48. svg element: textpath: href

49. svg element: use: href