The RadToolTip control has WAI-ARIA support which can be easily
enabled by setting EnableAriaSupport="true"
Please, note that an issue with the use of WAI-ARIA in HTML documents is that they
don’t validate. When you run a HTML document containing ARIA attributes through
the W3C Validator it shows errors in the results for any ARIA attributes. The
HTML 4.01 specification and its DOCTYPE
declarations (DTD) Strict,
, do not include any information about the WAI ARIA attributes and
you cannot have a valid HTML 4.01 document which includes, elements, attributes,
and attribute values, not detailed in its DTD’s. Thus, the WAI-ARIA attributes for the elements on the page
Note: Note, that in order to have the screen readers read the tooltip content, it
should be loaded before the target is hovered. That is why when the RadToolTipManager
uses Load On Demand, even if the WAI-ARIA support is enabled, it will not work for
the first hover because if we load the content in advance, this will defy the purpose
of using Load On Demand.