1. EventTarget.addEventListener()

    The modern standard API for adding DOM event handlers. Introduced in the DOM Level 2 Events spec. Also implies support for `removeEventListener`, the [capture phase](https://dom.spec.whatwg.org/#dom-event-capturing_phase) of DOM event dispatch, as well as the `stopPropagation()` and `preventDefault()` event methods.

  2. Drag and Drop

    Method of easily dragging and dropping elements on a page, requiring minimal JavaScript.

  3. EOT - Embedded OpenType fonts

    Type of font that can be derived from a regular font, allowing small files and legal use of high-quality fonts. Usage is restricted by the file being tied to the website

  4. hidden attribute

    The `hidden` attribute may be applied to any element, and effectively hides elements similar to `display: none` in CSS.

  5. IndexedDB

    Method of storing data client-side, allows indexed database queries.

  6. IndexedDB 2.0

    Improvements to Indexed DB, including getAll(), renaming stores and indexes, and binary keys.

  7. Path2D

    Allows path objects to be declared on 2D canvas surfaces

  8. cache api: add

  9. cache api: addall

  10. contactaddress api

  11. contactaddress api: addressline

  12. contactaddress api: city

  13. contactaddress api: country

  14. contactaddress api: dependentlocality

  15. contactaddress api: organization

  16. contactaddress api: phone

  17. contactaddress api: postalcode

  18. contactaddress api: recipient

  19. contactaddress api: region

  20. contactaddress api: sortingcode

  21. contactaddress api: tojson

  22. hiddevice api

  23. hiddevice api: close

  24. hiddevice api: collections

  25. hiddevice api: forget

  26. hiddevice api: `inputreport` event

  27. hiddevice api: open

  28. hiddevice api: opened

  29. hiddevice api: productid

  30. hiddevice api: productname

  31. hiddevice api: receivefeaturereport

  32. hiddevice api: sendfeaturereport

  33. hiddevice api: sendreport

  34. hiddevice api: vendorid

  35. indexeddb api

  36. indexeddb api: available in workers

  37. path2d api: addpath

  38. paymentaddress api

  39. paymentaddress api: addressline

  40. paymentaddress api: city

  41. paymentaddress api: country

  42. paymentaddress api: dependentlocality

  43. paymentaddress api: organization

  44. paymentaddress api: phone

  45. paymentaddress api: postalcode

  46. paymentaddress api: recipient

  47. paymentaddress api: region

  48. paymentaddress api: sortingcode

  49. paymentaddress api: `tojson()`

  50. html element: dd