Testing web sites and apps come in many forms. Testers try their best to test everything, but obviously there’s only so much they can do within a schedule. Some forms of testing are more prioritized than others, and that’s not inherently bad; for a solo tester on a team, one usually tests in a way that covers more bases at the beginning.
Web accessibility testing is one of those forms of testing that often takes a backseat, sometimes even forgotten. Web accessibility helps people with disabilities get better surfing experience. Although websites are typically not built with such functionality in mind, it matters.
And tota11y is a tool from Khan Academy we can leverage for testing accessibility. It is available as an easy-to-use bookmarklet. For whatever page we want to test, we just need to go there and click the bookmarklet, after which the tool will appear on the bottom left corner of the page. Clicking the tool reveals options and using each helps us spot common accessibility violations.
Here are some screenshots of using it on a page I test at work, checking headings, contrast, and link text:
Looks like there’s room for improvement, although these violations are not necessarily errors.