CSS Nesting

A syntax for nesting selectors, providing the ability to nest one style rule inside another.

Estimated Support About

2.33% + 11.63% = 13.96%


  • 1

    Partial. E { F {}} doesn’t work, but E { & F {}} does. Full support was added in macOS 14.2.

  • 2

    Buggy. The syntax is supported, but nested selectors are prefixed by the webmail, which might invalidate the selector.

  • 3

    Not supported. The nested selectors are removed, making the nested properties apply to the parent selector.

  • 4

    Partial. Not supported with Hotmail/Outlook accounts.


Know something we don't?

Is any of the above data outdated? Or do you want to add a new email client to the list? Heads on to GitHub and edit the data file!

Not comfortable with GitHub? Send us an email.

Test it yourself

This feature was last tested on August 31, 2023.

If you want to test this feature in the same conditions as we did, you can get our test code and run a test by yourself. Make sure to follow our testing recommendations first.