Why the audit is important
Deprecated APIs are scheduled to be removed from Chrome. Calling these APIs after they're removed will cause errors on your site.
How to pass the audit
Lighthouse flags the deprecated APIs in your report. Go to Chrome Platform Status and expand the entries for the APIs that you're using to learn more about why the APIs are deprecated, as well as how to replace them.
How the audit is implemented
This section explains how this audit is implemented, so that you can understand how the audit's score is calculated.
Lighthouse collects the deprecated API warnings that Chrome logs to the DevTools Console.