Yeah, I can't share actual lines of code, but I can give some examples. A lot of times the 👍🏻 is for refactoring, where the new code is a significant improvement over what was there before. Writing good tests often gets a 👍🏻, since we've all been working on that as a team. We've also been building our UI component library, so when we have the opportunity to include or create a new component, that gets a 👍🏻. Ditto re: adding useful comments on complex code.
Personally, if I see anything that makes me think "that was a good way to tackle that" or "glad we finally have that sorted out," I try to say as much to the person who coded it.
In a more general way, we also have a #shoutouts channel in Slack, where we are encouraged to call out someone who's had a "win" recently – not limited to code they've written, but for any work they've done. if you're feel like PRs aren't a natural place for you to add positivity, something like that may be a good way to accomplish something similar.
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