Version of Javascript (ES5, ES6) supported by the IDE browser?


I am working on a package that uses Vega/Vega-Lite - I think they are ES5 compliant, but they put out a question asking about the possibility to move to ES6.

I thought I might ask here about ES6 support within the IDE browser.



RStudio 1.1 doesn't support it, but RStudio 1.2 uses a recent version of Chromium and has a modern JavaScript engine with ES6 support.