Closure Compiler not Compiling ES6 library

Question

I am in the process of writing a rather large JavaScript library using the Closure Compiler, but I made a smaller mock up to use as an example of this issue:

src/main.js:

export function main(str) {
    console.log("From main: " + str);
}

Command:

google-closure-compiler --compilation_level ADVANCED_OPTIMIZATIONS --language_in ECMASCRIPT6 --language_out ECMASCRIPT6 --js_module_root src/ --module_resolution node --js src/main.js --js_output_file build/main.min.js

Expected Result (roughly):

export function main(str){console.log("From main: "+str)}

Actual Result:

'use strict';

Long story short, I've been struggling for hours, and I can't figure out how to get Closure Compiler to respect ES6 "export" statements. I've tried googling many times, but I can only get results for "goog.modules", which isn't what I want. Any help would be appreciated.

Answer 1

Closure Compiler does not currently support modules as output (in any format).