"ignore" file working even though it shouldn't based on the docs about knip HOT 4 CLOSED

Both are fine, the latter is recommended.

The docs don't contradict anything here?

from knip.

When using ignore, based on the statement:

This is not a good idea, since ignore patterns have only one goal: to exclude issues in matching files from the report. Files matching ignore patterns are not excluded from the analysis, only their issues are not reported.

If I just ran knip command:

exclude issues in matching files from the report

I would expect it to report e.g. an unused export inside of mockServiceWorker.js.

Files matching ignore patterns are not excluded from the analysis, only their issues are not reported.

In the list of unused files, I would expect mockServiceWorker.js to still be shown.

from knip.

Okay I think I get it now, it also states:

This also hurts performance, since the files are first analyzed, and eventually filtered out.

I interpreted the part "only their issues are not reported" as issues inside the file, but I guess it means the whole file being unused is also an issue of the file, and therefore filtered out (but only after the analysis ran on the file).

from knip.

Indeed! Any issue with files that match the ignore pattern is not reported.

from knip.