Fortunately, the typed AltJS language with the highest interest levels after TypeScript actually has really good code completion and error reporting :-)
Oh, and build speeds so fast that it's blink-and-you-miss-it. I think that's a pretty important part of useful feedback (and one that I hear TypeScript is not that great at).
Oh, and build speeds so fast that it's blink-and-you-miss-it. I think that's a pretty important part of useful feedback (and one that I hear TypeScript is not that great at).