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# Accessibility

The auro-hyperlink element has been designed and engineered to meet the WCAG 2.0 specifications. While there are multiple points to a success criterion, this document will cover core elements that ensure a consistent and useable experience.

Reference [Accessibility Techniques for Links](https://dequeuniversity.com/checklists/web/links)

#### Semantic Markup and Purpose

<table>
  <thead>
    <tr>
      <th>Topic</th>
      <th>Description</th>
      <th>Requirement</th>
      <th>Example</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Links versus buttons</td>
      <td>Links SHOULD be used only for actions that take the user to other locations, and SHOULD NOT be used for button-like functionality.</td>
      <td>best practice</td>
      <td>Find <auro-hyperlink href="https://www.alaskaair.com/en/flights-to-mexico">low-fare flights to Mexico</auro-hyperlink> on Alaska Airlines.</td>
    </tr>
  </tbody>
</table>

#### Link text

<table>
  <thead>
    <tr>
      <th>Topic</th>
      <th>Description</th>
      <th>Requirement</th>
      <th>Example</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Discernible text</td>
      <td>A link MUST have programmatically-discernible text, as determined by the accessible name calculation algorithm.</td>
      <td>WCAG 4.1.2</td>
      <td>Find <auro-hyperlink href="https://www.alaskaair.com/en/flights-to-mexico">low-fare flights to Mexico</auro-hyperlink> on Alaska Airlines.</td>
    </tr>
    <tr>
      <td>Links to external sites</td>
      <td>A link to an external site SHOULD indicate that it leads to an external site.</td>
      <td>Best practice</td>
      <td><auro-hyperlink href="https://webaim.org/techniques/hypertext/link_text" target="_blank" type="nav">Web AIM Links and Hypertext</auro-hyperlink></td>
    </tr>
    <tr>
      <td>Links opening in new tab or window</td>
      <td>A link that opens in a new window or tab SHOULD indicate that it opens in a new window or tab.</td>
      <td>Best practice</td>
      <td><auro-hyperlink href="https://auro.alaskaair.com/components/auro/hyperlink" target="_blank" type="nav">Auro hyperlink spec</auro-hyperlink></td>
    </tr>
    <tr>
      <td>Avoid "link" (or similar) in the link text</td>
      <td>The link text SHOULD NOT state its semantic role (e.g. don't say "link to..."), because screen readers already state the role before reading the link text.</td>
      <td>Best practice</td>
      <td><b>DO NOT DO THIS:</b><br>See the link for <auro-hyperlink href="https://www.alaskaair.com/en/flights-to-mexico">low-fare flights</auro-hyperlink> with Alaska.</td>
    </tr>
  </tbody>
</table>

#### Keyboard Accessibility

<table>
  <thead>
    <tr>
      <th>Topic</th>
      <th>Description</th>
      <th>Requirement</th>
      <th>Example</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Keyboard-focusable</td>
      <td>Links MUST be keyboard-focusable. (Use the <code>tab</code> key to place focus on any hyperlink element)</td>
      <td>WCAG 2.1.1</td>
      <td><auro-hyperlink href="https://www.alaskaair.com/en/flights-to-mexico">low-fare flights to Mexico</auro-hyperlink> on Alaska Airlines.</td>
    </tr>
    <tr>
      <td>Keyboard activation</td>
      <td>Links MUST activate with the enter/return key. (Use the <code>tab</code> key to place focus on any hyperlink element)</td>
      <td>WCAG 2.1.1</td>
      <td><auro-hyperlink href="https://www.alaskaair.com/en/flights-to-mexico">low-fare flights to Mexico</auro-hyperlink> on Alaska Airlines.</td>
    </tr>
  </tbody>
</table>

#### Focus Order

| Topic | Description | Requirement |
|---|---|---|
|Focus order|The navigation order of focusable elements (links, form elements, etc.) MUST be logical and intuitive.|WCAG 2.4.3|
|Tabindex|The tabindex attribute SHOULD NOT be used with positive values to customize the tab order (e.g. don't use `tabindex="1"`).|Best practice|

#### Link Colors, Contrast, and Styles

<table>
  <thead>
    <tr>
      <th>Topic</th>
      <th>Description</th>
      <th>Requirement</th>
      <th>Example</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Visually distinguishable</td>
      <td>Links MUST be visually distinguishable from surrounding non-link text.</td>
      <td>WCAG 1.4.1</td><td>Find <auro-hyperlink href="https://www.alaskaair.com/en/flights-to-mexico">low-fare flights to Mexico</auro-hyperlink> on Alaska Airlines.</td>
    </tr>
    <tr>
      <td>Using color to distinguish links</td>
      <td>
        Color MUST NOT be the only method used to distinguish links from surrounding text, <strong>unless the color contrast between the link and adjacent text is at least 3:1 and an additional visual indicator (such as an underline or outline) is provided on hover and focus.</strong><br><br> See <auro-hyperlink href="https://webaim.org/resources/contrastchecker/?fcolor=0074CB&amp;bcolor=222222" target="_blank">color contrast test</auro-hyperlink>.
      </td>
      <td>WCAG 1.4.1</td>
      <td><auro-hyperlink type="nav" href="https://www.alaskaair.com/en/flights-to-mexico">Find low-fare flights to Mexico</auro-hyperlink></td>
    </tr>
    <tr>
      <td>Link contrast</td>
      <td>Links MUST have a contrast ratio of 4.5:1 (for small text) or 3:1 (for large text) against their background. <br><br>See <auro-hyperlink href="https://webaim.org/resources/contrastchecker/?fcolor=0074CB&amp;bcolor=FFFFFF" target="_blank">color contrast test</auro-hyperlink>.</td>
      <td>WCAG 1.4.3</td>
      <td><auro-hyperlink type="nav" href="https://www.alaskaair.com/en/flights-to-mexico">Find low-fare flights to Mexico</auro-hyperlink></td>
    </tr>
  </tbody>
</table>

#### Visual Focus Indicator

<table>
  <thead>
    <tr>
      <th>Topic</th>
      <th>Description</th>
      <th>Requirement</th>
      <th>Example</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Focus indicator</td>
      <td>All links MUST show a visual focus indicator when in focus. (Use the <code>tab</code> key to place focus on any hyperlink element)</td><td>WCAG 2.4.7</td>
      <td><auro-hyperlink type="nav" href="https://www.alaskaair.com/en/flights-to-mexico">Find low-fare flights to Mexico</auro-hyperlink></td>
    </tr>
  </tbody>
</table>
