gulp-browserify-babel.js

var browserify   = require('browserify');
var source       = require('vinyl-source-stream');
var babelify     = require('babelify');
var buffer       = require('vinyl-buffer');

gulp.task('js', function () {
	return browserify(join(__dirname, PATH.src.install.jsMain), { debug: true })
		.on('error', function(err) { console.error(err); this.emit('end'); })
		.transform(babelify,  {presets: ["es2015", "stage-0"]})
		.bundle()
		.pipe(source('app.js'))
		.pipe(buffer())
		.pipe(gulp.dest(join(PATH.dest.install.js)));
});