I’d rather avoid using .es6 as a file extension as it’s not really a standard. Javascript is still Javascript. I’m wondering if Meteor 1.2 will allow us to use the .js extension for all code, and somehow determine (or let us specify) that our project uses ES6 or ES5.
I asked this question a few days ago. It seems that the best option is to just use .jsx for now and rename files to .js when support comes out in Meteor 1.2. If you’re using git to handle the files, it shouldn’t care too much.