code: function build() {
  	return gulp
  		.src('src/**/*.js')
  		.pipe($.plumber())
  		.pipe($.debug({ title: 'build' }))
  		.pipe($.sourcemaps.init())
  		.pipe($.babel({
  			sourceRoot: 'src'
  		}))
  		.pipe($.sourcemaps.write())
  		.pipe(gulp.dest(distDir));
  }
docs: /*
  build tasks