1. gap property for Flexbox

    `gap` for flexbox containers to create gaps/gutters between flex items

  2. CSS3 Multiple column layout

    Method of flowing information in multiple columns

  3. fontface api: linegapoverride

  4. css at-rule: `@font-face`: line-gap-override

  5. css property: column-gap: supported in flex layout

  6. css property: column-gap: supported in grid layout

  7. css property: column-gap: supported in multi-column layout

  8. css property: column-gap: supported in multi-column layout: `calc()` values

  9. css property: column-gap: supported in multi-column layout: `<percentage>` values

  10. css property: gap: supported in flex layout

  11. css property: gap: supported in grid layout

  12. css property: gap: supported in grid layout: `calc()` values

  13. css property: gap: supported in grid layout: `<percentage>` values

  14. css property: gap: supported in multi-column layout

  15. css property: row-gap: supported in flex layout

  16. css property: row-gap: supported in grid layout