1. Resource Hints: dns-prefetch

    Gives a hint to the browser to perform a DNS lookup in the background to improve performance. This is indicated using `<link rel="dns-prefetch" href="https://example.com/">`

  2. Resource Hints: preconnect

    Gives a hint to the browser to begin the connection handshake (DNS, TCP, TLS) in the background to improve performance. This is indicated using `<link rel="preconnect" href="https://example-domain.com/">`

  3. Resource Hints: prefetch

    Informs the browsers that a given resource should be prefetched so it can be loaded more quickly. This is indicated using `<link rel="prefetch" href="(url)">`

  4. Resource Hints: preload

    Using `<link rel="preload">`, browsers can be informed to prefetch resources without having to execute them, allowing fine-grained control over when and how resources are loaded. Only the following `as` values are supported: fetch, image, font, script, style, track.

  5. Resource Hints: prerender

    Gives a hint to the browser to render the specified page in the background, speeding up page load if the user navigates to it. This is indicated using `<link rel="prerender" href="(url)">`

  6. prefers-color-scheme media query

    Media query to detect if the user has set their system to use a light or dark color theme.

  7. prefers-reduced-motion media query

    CSS media query based on a user preference for preferring reduced motion (animation, etc).

  8. presentation api

  9. presentationavailability api

  10. presentationavailability api: value

  11. presentationconnection api

  12. presentationconnectioncloseevent api

  13. presentationconnectionlist api

  14. presentationconnection api: binarytype

  15. presentationconnection api: close

  16. presentationconnection api: id

  17. presentationconnection api: send

  18. presentationconnection api: state

  19. presentationconnection api: terminate

  20. presentationconnection api: url

  21. presentationreceiver api

  22. presentationreceiver api: connectionlist

  23. presentationrequest api

  24. presentationrequest api: getavailability

  25. presentationrequest api: reconnect

  26. presentationrequest api: start

  27. presentation api: defaultrequest

  28. presentation api: receiver

  29. pressureobserver api

  30. pressureobserver api: disconnect

  31. pressureobserver api: observe

  32. pressureobserver api: takerecords

  33. pressureobserver api: unobserve

  34. pressurerecord api

  35. pressurerecord api: source

  36. pressurerecord api: state

  37. pressurerecord api: time

  38. pressurerecord api: tojson

  39. html element: pre

  40. javascript built-in: object: preventextensions

  41. javascript built-in: proxy: handler: preventextensions

  42. javascript built-in: reflect: preventextensions