aria-relevant attribute is an optional value used to describe what types of changes have occurred to an
aria-live region, and which are relevant and should be announced. Any change that is not relevant acts in the same manner it would if the
aria-live attribute were set to
aria-relevant is commonly used when a web page contains content that may be updated while viewing the page.
A space-delimited list of one or more of the following values:
additionsare insertion of nodes into the live region; should be considered relevant.
removalsare deletion of nodes; should be considered relevant.
textare changes to the textual content of existing nodes; should be considered relevant.
allis equivalent to additions removals text.
aria-relevant="additions text" is the default value on a live region.