the only sort of valid reason I have heard so far is "I have ideological hatred of all native UI toolkits", everything else is just not knowing what e.g. Qt 5 can do
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look, if you absolutely *insist* on using JavaScript, you can use that to write apps with Qt 5. I wouldn't say you should, but you can, and it's less horrible than the "web platform"
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depending on what part of Qt5 you use, the JS support is years behind browsers though (writing QML JS feels like 2010 again, without the cross-browser issues though)
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you can embed a WebView but iirc that's a WebKit so uhhh what exactly did I save again
maybe there's a way of writing nice JS for Qt that isn't also pointless but I've not found it yet
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ok so QML (which allows you to write interfaces in JS and has nice things like actual Signals) uses its own JS engine called V4, at least it did the last time I evaluated the topic which was Qt 5.4 times iirc
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that stuff is native but it's not my department at work so take it with a grain of salt
meanwhile Qt WebView allows you to render HTML+CSS+JS but is a full webkit, so basically a browser (unless they switched to V4? which I doubt)
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and last time I tried (a few months ago?) all the nice ES6 stuff like spread operator, destructuring assignment, fat comma lambdas etc was still missing from V4
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I have now, hmm
I did not run it but I saw no mention of QtCreator integration? I suspect the recommended way to use this is to import your compiled code as JS lib, which'll work but you'll lack IDE support
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the way our codebase currently looks, this may be useful in one or two places, but I don't know if I'll be able to get a green light for it (there are so many lower-hanging fruits and nobody but me has web background)