1. CSS Relative color syntax

    Relative color syntax in CSS allows a color to be defined relative to another color using the `from` keyword and optionally `calc()` for any of the color values.

  2. Datalist element

    Method of setting a list of options for a user to select in a text field, while leaving the ability to enter a custom value.

  3. createimagebitmap api: `options.imageorientation` parameter: value `from-image`

  4. createimagebitmap api: `options.imageorientation` parameter: value `none`

  5. htmloptionelement api: value

  6. subtlecrypto api: derivekey: `aes` as `derivedkeyalgorithm` option value

  7. subtlecrypto api: derivekey: `hkdf` as `derivedkeyalgorithm` option value

  8. subtlecrypto api: derivekey: `hmac` as `derivedkeyalgorithm` option value

  9. subtlecrypto api: derivekey: `pbkdf2` as `derivedkeyalgorithm` option value

  10. html element: option: value

  11. headers http header: x-frame-options: `deny` value

  12. headers http header: x-frame-options: `sameorigin` value

  13. javascript built-in: intl: datetimeformat: `datetimeformat()` constructor: `options` parameter: `options.timezonename` parameter: `shortgeneric`/`longgeneric`/`shortoffset`/`longoffset` as `options.timezonename` option

  14. javascript built-in: intl: numberformat: `numberformat()` constructor: `options` parameter: `options.signdisplay` parameter: `negative` value

  15. javascript built-in: intl: numberformat: `numberformat()` constructor: `options` parameter: `options.usegrouping` parameter: `options.usegrouping` parameter accepts: `'always'`, `'auto'`, `'min2'` (in addition to: `true` and `false`)