code.js

export class Greeter {

}

main.js

import {Greeter} from './code.js';

var g = new Greeter();

transpile.sh

./traceur --out transpiled.js code.js
# This fails:
# code.js:1:1: unexpected token export
# code.js:1:8: Semi-colon expected
# undefined


./traceur --out transpiled.js main.js
# This works fine, but transpiles everything into a single file.