Facebook Launches Flow, Static Type Checker for JavaScript

Re:Facebook Launches Flow, Static Type Checker for JavaScript by xixixao on Wednesday November 19, 2014 @04:43AM (#8629065)

Google Closure: function hello(a){alert("Hello, "+a)}hello(3); Compilation was a success! No warnings No errors

+ it's not incremental hence unusably slow, requires Java. No, Closure is not the same as Flow even from a brief look at both.

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Re:Facebook Launches Flow, Static Type Checker for JavaScript by Cthulhu_ on Wednesday November 19, 2014 @06:50AM (#8629493)

That's because it's all valid Javascript - concatenating a string with a number is normal practice even in strongly typed languages (implicit type conversion). So, I don't see your point. If the argument 'a' had an annotation saying it should be a string, then I could understand an error from some checker tool, but then it wouldn't be vanilla JS anymore.

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