he/him 
Starting to use `=== false` more instead of unary `!`. Feels more explicit when JS truthy rules can cause so many unintended bugs.
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Do you also do `=== true`? Definitely better in untyped JS dialects.
I'm starting to. Haven't really thought about it much but now that it's front of mind I'm doing it more. I'm using @flowtype too.
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You can then just make an error when the value evaluated in a conditional has unknown type or would be subject to surprising conversion.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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