Gulp Minify Javascript

This will put a copy of the minified js file in the same folder in which it was found.

It will require the following: useref, gulpif

gulp.task('jsminify', function() {

  return gulp.src([

    "!node_modules/**/*.js",

    "**/wp-content/themes/**/*.js",

    "!**/**.min.js"

  ], { base: "./" })

  .pipe(useref())

  .pipe(gulpIf('*.js', uglify()))

  .pipe(rename({suffix: '.min'}))

  .pipe(gulp.dest('./'));

});