What does this mean?
When viewed on small screens (like mobile phones) content must fit without requiring scrolling in two dimensions.More help
WCAG 2.1 specifically requires this for:
- Vertical scrolling content at a width equivalent to 320 CSS pixels
- Horizontal scrolling content at a height equivalent to 256 CSS pixels
Except for parts of the content which require two-dimensional layout for usage or meaning, such as a maps application.
How close this website is to fixing this issue.
This is probably because we're still working on this. Take a look at another issue.