1. Media Queries: resolution feature

    Allows a media query to be set based on the device pixels used per CSS unit. While the standard uses `min`/`max-resolution` for this, some browsers support the older non-standard `device-pixel-ratio` media query.

  2. Window.devicePixelRatio

    Read-only property that returns the ratio of the (vertical) size of one physical pixel on the current display device to the size of one CSS pixel.

  3. paintworkletglobalscope api: devicepixelratio

  4. window api: devicepixelratio

  5. css at-rule: `@media`: `-moz-device-pixel-ratio` media feature

  6. css at-rule: `@media`: `-webkit-device-pixel-ratio` media feature

  7. css at-rule: `@media`: `-webkit-max-device-pixel-ratio` media feature

  8. css at-rule: `@media`: `-webkit-min-device-pixel-ratio` media feature