1. CSS background-attachment

    Method of defining how a background image is attached to a scrollable element. Values include `scroll` (default), `fixed` and `local`.

  2. CSS print-color-adjust

    The `print-color-adjust` (or `-webkit-print-color-adjust` as prefixed in WebKit/Blink browsers) property is a CSS extension that can be used to force printing of background colors and images.

  3. CSS position:fixed

    Method of keeping an element in a fixed location regardless of scroll position

  4. CSS position:sticky

    Keeps elements positioned as "fixed" or "relative" depending on how it appears in the viewport. As a result the element is "stuck" when necessary while scrolling.

  5. Decorators

    ECMAScript Decorators are an in-progress proposal for extending JavaScript classes. Decorators use a special syntax, prefixed with an `@` symbol and placed immediately before the code being extended.

  6. CSS Flexible Box Layout Module

    Method of positioning elements in horizontal or vertical stacks. Support includes all properties prefixed with `flex`, as well as `display: flex`, `display: inline-flex`, `align-content`, `align-items`, `align-self`, `justify-content` and `order`.

  7. xrprojectionlayer api: fixedfoveation

  8. xrwebgllayer api: fixedfoveation

  9. css property: background-attachment: fixed

  10. css property: field-sizing: fixed

  11. javascript built-in: arraybuffer: transfertofixedlength

  12. javascript built-in: number: tofixed

  13. javascript built-in: string: fixed