1. Explicit descendant combinator >>

    An explicit, non-whitespace spelling of the descendant combinator. `A >> B` is equivalent to `A B`.

  2. CSS3 tab-size

    Method of customizing the width of the tab character. Only effective using 'white-space: pre', 'white-space: pre-wrap', and 'white-space: break-spaces'.

  3. domtokenlist api: trims whitespace

  4. css property: white-space

  5. css property: white-space: `break-spaces`

  6. css property: white-space: `nowrap`

  7. css property: white-space: `pre`

  8. css property: white-space: `pre-line`

  9. css property: white-space: `pre-wrap`

  10. css property: white-space: support in svg

  11. css property: white-space: support on `<textarea>`

  12. css selector: `:-moz-only-whitespace`

  13. css selector: `:empty`: matches elements with whitespace

  14. css text-space-collapse property

  15. microdata api