Meanwhile, the tech community and our courts system were forced to deal with the issue on their own. First, the tech community coalesced around a set of standards via the World Wide Web Consortium, establishing the Web Content Accessibility Guidelines in 2008 and later updating them in 2012 (WCAG 2.0), when they were also adopted as an ISO standard. Today, web designers and developers across the world use WCAG 2.0 to guide their design and development, typically aiming to meet all of the standards under Level AA.
Error prevention on important forms (3.3.4): For pages that create legal commitments or financial transactions or any other important data submissions, one of the following is true: 1) submissions are reversible, 2) the user has an opportunity to correct errors, and 3) confirmation is available that allows an opportunity to review and correct before submission.
In some circumstances, longer and more detailed text will be necessary to convey the same meaningful information that other visitors to the website can see. For example, a map showing the locations of neighborhood branches of a city library needs a tag with much more information in text format. In that instance, where the map conveys the locations of several facilities, add a “longdesc” tag that includes a text equivalent description of each location shown on the map – e.g., “City Center Library, 433 N. Main Street, located on North Main Street between 4th Avenue and 5th Avenue.”
Because the ADA does not specifically mention websites, it also does not outline standards for how organizations can make their websites accessible. However, the DOJ has frequently cited recommendations such as the Web Content Accessibility Guidelines (WCAG) 2.0 as acceptable metrics for accessibility. WCAG 2.0 includes many different criteria at three different “success levels” of accessibility, ranging from high-contrast color schemes to closed captions for video content.
The statement that “noncompliance with a voluntary technical standard for website accessibility does not necessarily indicate noncompliance with the ADA” is new and significant.  It is a recognition that a website may be accessible and usable by the blind without being fully compliant with the privately developed Web Content Accessibility Guidelines (WCAG) 2.0 or 2.1.  The statement confirms what some courts have said so far:  That the operative legal question in a website accessibility lawsuit is not whether the website conforms with WCAG, but whether persons with disabilities are able to access to a public accommodation’s goods, services, and benefits through the website, or some alternative fashion.