Shadow DOM Test

The Shadow DOM is used to isolate reusable web components from the rest of a web page. It is a technique being used by many modern component libraries. If an accessibility testing tool cannot test within Shadow DOMs, it may miss important accessibility issues, and should not be used unless you are certain the pages you are testing do not use Shadow DOMs.

There are two inputs without labels below -- accessibility testing tools should identify both as errors. If a tool only finds the first one, it probably cannot test within Shadow DOMs:

[Shadow DOM will go here -- if you see this message, the script didn't run correctly.]

For more information, see MDN: Using Shadow DOM