this post was submitted on 21 Apr 2024
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It leads to typescript
You get surprises from npm
I spent way too long today figuring out why my app was doing something that it's NOT supposed to do on weekends.
I read Luxon's docs (pretty cool lib tbh) again and again, and tried everything I could think of to get isWeekend to return a sane result.
Turns out I was pulling a somewhat older version of Luxon, where isWeekend didn't exist. In any sane language, I expect I'd get a huge warning about a property that doesn't exist, but alas...
Typescript helps me keep my sanity, but juuuuust barely.
Weren't you getting runtime errors for the function not being found?
I don't know how luxon works, but isWeekend could be a property instead of a function
It is. It also happens to be undefined, and checking that for truth is how I was bitten.