[jspash]

Personally, I would never run a linter of any kind on a full codebase that doesn't have tests. After having been bitten by all kinds of bugs over the years, I wouldn't suggest auto-linting any file that you aren't actively working on.

It's rare that linting will actually make the code work better. Granted, it could catch some security bugs. But they can - and will - introduce new bugs. You just have to ask if it's worth the risk.

[dtgriscom]

This. It's so tempting when a linter warns "This code is misleading; it would be clearer to do it this other way" to think "Easy fix: change it the way the linter suggests." But, make the change, and you may discover (hopefully before delivery) that the code functionality depends on the confusing behavior.