ES5, SCSS build script

gulpfile.js

const gulp = require("gulp")
    ,uglify = require('gulp-uglify')
    ,babel = require('gulp-babel')
    ,scss = require("gulp-sass")
    ,browserify = require("gulp-browserify")
    ,rename = require('gulp-rename')
;

const paths = {
    scripts: ['bin/js/**/*.js']
    ,scss: ["bin/scss/**/*.scss"]
};

gulp.task('watch', function() {
    gulp.watch(paths.scripts, ['scripts']);
    gulp.watch(paths.scss, ['scss']);
});

gulp.task("scripts", () => {
    gulp.src(paths.scripts)
        .pipe(babel({
            presets: ['es2015']
        }))
        .pipe(uglify())
        .pipe(browserify())
        .pipe(rename("pony-player.min.js"))
        .pipe(gulp.dest("./build/js/"))
});

gulp.task("scss", () => {

    gulp.src(paths.scss)
        .pipe(scss({outputStyle: 'compressed'}).on('error', scss.logError))
        .pipe(rename("pony-player.min.css"))
        .pipe(gulp.dest('./build/css'))

});

gulp.task("default",[
    "scripts"
    ,"scss"
    ,"watch"
]);