I wrote a couple of (simple) apps in LiveScript, which is similar to CoffeeScript, but is still way ahead of ES6 in terms of features[1]. I had to look at the generated source only once: when I was debugging and ultimately fixing a bug in the compiler. That&#x27;s expected: had my C compiler had a bug, I&#x27;d have to look at asm output, too.<p>Normally, pre-source maps, I&#x27;d also look at generated JS when debugging in the browser, but this is no longer the case. Other than the mentioned compiler bug I didn&#x27;t have to look at the generated JS even once in my 2-3 years of using LiveScript.<p>I think a good question to ask would be why did you have to look at the generated source. What did that give you, and what could replace it? Is looking at the generated source the most efficient way to achieve your goals?<p>[1] The &quot;killer feature&quot; of LiveScript, for me, is its support for functional programming on par with support for OO. It reminds me of Scala or F# in that regard.