fragment content that be moved to be visible but you don't want announced. Things like long form news articles where you might render the graphics with accompan

fragment content that be moved to be visible but you don't want announced. Things like long form news articles where you might render the graphics with accompanying descriptions off screen (to save cycles) but as you scroll into view while reading you shift it to be visible. Really its good for anything where you don't want the browser to "paint" but you want to have the content fully loaded without the user having any idea until you essentially want them to