Please provide versioning option for javascript

[GetCodePanda]

Please Provide option to select the version for javascript something like --js-version = es6 and current express generator comes with previous versions of javascript. So we want the express generator to take care everything for our development side setup ... If this versioning option already exists ... I am so sorry ... Please let me know

[gokaygurcan]

Two words: backwards compatibility.

But I'd like to see the outcome of this thread.

/cc @dougwilson

[dougwilson]

I know there were some PRs created around this area, but I don't think they occurred due to eventual abandonment. Since that time, though, a lot of the underlying generation methods have been change, potentially making implementing a switch like this an easier task to make a PR for. A long time ago it was just es5 vs es6, but now it evolves so fast, and is of course out-of-sync with what v8 in Node.js supports, it may be better to implement a switch to declare your Node.js version target and then the latest es* will get used that would work on that Node.js version.