gulp concat

var gulp = require('gulp');
var $ = require('gulp-load-plugins')();
$.concat = require('gulp-concat');

gulp.task('default', function() {
  return gulp.src([
  		'js/foundation.core.js', 
	  	'js/foundation.util.box.js', 
  		'js/foundation.util.keyboard.js', 
	  	'js/foundation.util.mediaQuery.js', 
  		'js/foundation.util.motion.js',
  		'js/foundation.util.nest.js',
  		'js/foundation.util.timerAndImageLoader.js',
  		'js/foundation.util.touch.js',
  		'js/foundation.util.triggers.js'
  	])
//    .pipe($.sourcemaps.init())
    .pipe($.babel()) // <-- There it is!
    .pipe($.concat('foundation.js'))
    .pipe(gulp.dest('../../js/'));
});