How to see CSS boxes in firefox inspector
After reading above page, i just found out an HTML element can be turned into zero or multiple boxes.
The page gives an example: li element is transformed into multiple boxes.
In firefox browser, i have opened up inspector and choose "box model" tab, and tried to inspect that li element.
But there is only one box in "box model" section, according to above URL, there are multiple boxes for the li element, but why i can not see or select those extra boxes?
like those line-boxes, how to see/debug them?
Ok, that my mistake, that URL is a working draft, not been implemented.