Our app is automatically tested (structure, markup) and manually tested for web app accessibility (keyboard navigation, screen reader support).

Our app is reviewed for compliance with WCAG 2.1 and a11y guidelines for accessibility.

WCAG 2.1

Our app is compliant with WCAG 2.1 checklist Level AAA (Advanced).

The symptom checker app is compliant with the guidelines, but it is possible that you could break compliance with 1.4.1 – Use of Colour (Level A) by providing a bootstrap theme that does not follow the guidelines.

Here are some helpful resources:

• About the guidelines
• Contrast Checker

A11Y

Our symptom checker app depends on the use of javascript and requires javascript to be enabled. With the exception of the javascript section, the symptom checker app can be compliant with the Web Accessibility Checklist. It is possible to break compliance by using colors with insufficient contrast in your bootstrap 4 theme.

When designing your theme, consider the following guidelines:

• Color and Contrast – the colors that you assign in your bootstrap theme should use colors with sufficient contrast between text and its background.
• Contrast Checker

The A11Y guidelines discourage the use of inline scripts. Our embed script includes a short inline script. We recommend this because it simplifies implementation and keeps the implementation details for our application grouped together on the host page. If you are concerned with this recommendation, please move this part of the embed script to a local javascript file.