wcag/guidelines/sc/20/non-text-content.html at 7adfb4ff0662ce1b74ed29b62f367e4fc7aca835 · w3c/wcag · GitHub

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<section id="non-text-content" class="sc">

   <h4>Non-text Content</h4>

   <p class="conformance-level">A</p>

   <p>All <a>non-text content</a> that is presented to the user has a <a>text alternative</a> that serves the equivalent purpose, except for the situations listed below.
   </p>

   <dl>

      <dt>Controls, Input</dt>

      <dd>

         <p>If non-text content is a control or accepts user input, then it has a <a>name</a> that describes its purpose. (Refer to <a href="#name-role-value">Success Criterion 4.1.2 Name, Role, Value</a> for additional requirements for controls and content that accepts user input.)
         </p>

      </dd>

      <dt>Time-Based Media</dt>

      <dd>

         <p>If non-text content is time-based media, then text alternatives at least provide descriptive
            identification of the non-text content. (Refer to <a href="#time-based-media">Guideline 1.2</a> for additional requirements for media.)
         </p>

      </dd>

      <dt>Test</dt>

      <dd>

         <p>If non-text content is a test or exercise that would be invalid if presented in <a>text</a>, then text alternatives at least provide descriptive identification of the non-text
            content.
         </p>

      </dd>

      <dt>Sensory</dt>

      <dd>

         <p>If non-text content is primarily intended to create a <a>specific sensory experience</a>, then text alternatives at least provide descriptive identification of the non-text
            content.
         </p>

      </dd>

      <dt><a>CAPTCHA</a></dt>

      <dd>

         <p>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.
         </p>

      </dd>

      <dt>Decoration, Formatting, Invisible</dt>

      <dd>

         <p>If non-text content is <a>pure decoration</a>, 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 <a>assistive technology</a>.
         </p>

      </dd>

   </dl>

</section>