gulpfile for es6 transpiling with babeljs

gulpfile.js

var gulp = require("gulp");
var babel = require("gulp-babel");
var sourcemaps = require("gulp-sourcemaps");

gulp.task("default", function () {
  return gulp.src("es6.js")
    .pipe(babel())
    .pipe(gulp.dest("dist"));
});

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

gulp.task('modules', function() {
    browserify({
    entries: './es6.js',
    debug: true
    })
    //.pipe(sourcemaps.init())
    .transform(babelify.configure({
      experimental: true
    }))
    .bundle()

    .pipe(source('output.js'))
    .pipe(sourcemaps.write())
    .pipe(gulp.dest('./dist'));
});