It isn’t a problem by default, a lot of it comes down to how it is built. I’d suggest either considering a highly accessible contingency option, or build those components in such a way that there is a level of accessibility baked into it. If you need help with that testing or review email us at questions at yokoco.com and we’ll be able to let you know the cost for us to lend a hand.
When the law was enacted in 1990, it did not specifically address website accessibility for the disabled, but this has become a much-discussed topic in recent years. In 2006, Target settled a class action lawsuit alleging Target.com was inaccessible to the blind, in violation of the ADA, and in 2015 both Reebok and the NBA were hit with a class action lawsuit that alleged their websites did not accomodate the blind and visually impaired.
The words in the tag should be more than a description. They should provide a text equivalent of the image. In other words, the tag should include the same meaningful information that other users obtain by looking at the image. In the example of the mayor’s picture, adding an “alt” tag with the words “Photograph of Mayor Jane Smith” provides a meaningful description.