Technology has progressed some are calling for the Americans with Disabilities Act to apply to websites as well. The best recommendation for a business, especially one with a physical store, is to comply with the Web Content Accessibility Guidelines 2.0 or 2.1 AA gold standard.
Legal landscape of website accessibility. Inaccessible websites mobile apps fail to comply with ADA and similar state laws. DOJ lacks detailed website accessibility standards. Americans with Disabilities Act effective communication provisions apply to web accessibility