Support of ES6+

[tim37021]

Hi, I've been watching this project for quite a while(from 2017). It's good to see it is still improving.

I wonder will it support ES6+ in the future? It will be very handy.

I've done some investigation.
In qmlweb-parser. It uses gulp to copy uglifyjs 1.3.5's code to support QML. This approach makes it hard to change to new javascript parser(uglify-js3, acorn, esprima) nor can auto complete work properly. And also, it seems the AST tree is a little bit coupling with the QmlEngine and QmlBinding.

[Plaristote]

I actually tried to make the update to uglify3 a few months ago, unsuccessfully. It's not really fresh in my mind anymore, but there were a lot of set backs, and I just had to give up. The API for tokenizer and parse have been updated. It didn't seem like much at first... but I still wasn't able to get it to work.

Surely doable. But not a trivial task to achieve.

[tim37021]

I tried uglify3 last weekend. AST've changed so much. And they do not expose tokenizer anymore.

[tim37021]

I am thinking about really writing a new parser. for javascript part it will aggregate on existing one.