(Refer to Guideline 1.2 for additional requirements for media.) Test If non-text content is a test or exercise that would be invalid if presented in text , then text alternatives at least provide descriptive identification of the non-text
            content. Sensory If non-text content is primarily intended to create a specific sensory experience , then text alternatives at least provide descriptive identification of the non-text
            content. CAPTCHA If the purpose of non-text content is to confirm that content is being accessed by
            a person rather than a computer, then text alternatives that identify and describe
            the purpose of the non-text content are provided, and alternative forms of CAPTCHA
            using output modes for different types of sensory perception are provided to accommodate
            different disabilities. Decoration, Formatting, Invisible If non-text content is pure decoration , is used only for visual formatting, or is not presented to users, then it is implemented
            in a way that it can be ignored by assistive technology . Guideline 1.2 Time-based Media Understanding Time-based Media | How to Meet Time-based Media Provide alternatives for time-based media.