1. 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.

  2. mediastreamtrack api: applyconstraints: `aspectratio` constraint

  3. svganimatedpreserveaspectratio api

  4. svganimatedpreserveaspectratio api: animval

  5. svganimatedpreserveaspectratio api: baseval

  6. svgfeimageelement api: preserveaspectratio

  7. svgimageelement api: preserveaspectratio

  8. svgmarkerelement api: preserveaspectratio

  9. svgpatternelement api: preserveaspectratio

  10. svgpreserveaspectratio api

  11. svgpreserveaspectratio api: align

  12. svgpreserveaspectratio api: meetorslice

  13. svgsvgelement api: preserveaspectratio

  14. svgsymbolelement api: preserveaspectratio

  15. svgviewelement api: preserveaspectratio

  16. xrcylinderlayer api: aspectratio

  17. css at-rule: `@media`: `aspect-ratio` media feature

  18. css at-rule: `@media`: `device-aspect-ratio` media feature

  19. css property: aspect-ratio

  20. css property: aspect-ratio: auto

  21. html element: img: aspect ratio computed from `width` and `height` attributes

  22. html element: video: aspect ratio computed from `width` and `height` attributes

  23. svg element: feimage: preserveaspectratio

  24. svg element: image: preserveaspectratio

  25. svg element: svg: preserveaspectratio

  26. svg element: symbol: preserveaspectratio

  27. svg element: view: preserveaspectratio