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. Background-clip: text

    Clipping a background image to the foreground text.

  3. CSS3 Background-image options

    New properties to affect background images, including background-clip, background-origin and background-size

  4. CSS background-repeat round and space

    Allows CSS background images to be repeated without clipping.

  5. CSS background-position edge offsets

    Allows CSS background images to be positioned relative to the specified edge using the 3 to 4 value syntax. For example: `background-position: right 5px bottom 5px;` for positioning 5px from the bottom-right corner.

  6. CSS background-blend-mode

    Allows blending between CSS background images, gradients, and colors.

  7. CSS Canvas Drawings

    Method of using HTML5 Canvas as a background image. Not currently part of any specification.

  8. 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.

  9. CSS3 Multiple backgrounds

    Method of using multiple images as a background

  10. CSS3 object-fit/object-position

    Method of specifying how an object (image or video) should fit inside its box. object-fit options include "contain" (fit according to aspect ratio), "fill" (stretches object to fill) and "cover" (overflows box but maintains ratio), where object-position allows the object to be repositioned like background-image does.

  11. SVG in CSS backgrounds

    Method of using SVG images as CSS backgrounds

  12. css property: background-image

  13. css property: background-image: `element()`

  14. css property: background-image: gradients

  15. css property: background-image: `image-rect()`

  16. css property: background-image: `image-set()`

  17. css property: background-image: multiple backgrounds

  18. css property: background-image: svg images

  19. css property: background: svg image as background