The biggest barrier to high fidelity ECMAScript apps on native platform is simple economics. Apple is guaranteed a $99 bounty when you push something on the appstore. Making Safari or WebView compatible with their native APIs and performance is a risk for AppStore.
Having built 3 non-trivial iOS apps using phonegap and JavaScript. I have come to the conclusion that I'm never going to build native apps using web stack. I have struggled with API support, DOM limitations and performance.
Disclaimer: I have not tried react native.
I think it'll fail for mission critical and non-trivial apps. If you just want an AppStore presence for your browser app or your app is trivial like one in the post. You are probably going to be fine.
Having built 3 non-trivial iOS apps using phonegap and JavaScript. I have come to the conclusion that I'm never going to build native apps using web stack. I have struggled with API support, DOM limitations and performance.
Disclaimer: I have not tried react native.
I think it'll fail for mission critical and non-trivial apps. If you just want an AppStore presence for your browser app or your app is trivial like one in the post. You are probably going to be fine.