GulpUglifyError:Unable to minify JavaScript

Question

I am trying to minify my script files for which i am using gulp task runner And I am trying gulp-uglify plugin

Code:

 gulp.task(\'concat\', function() {         


        

Answer 1

For me, it was a deprecated option "preserveComments" that generated the error (and completely crashed the script).

Found the issue using:

gulp.task('concat', function() {
return gulp.src('app/**/*.js')
    .pipe(uglify())
    .on('error', function (err) { console.log( err ) })
    .pipe(gulp.dest('./dist/'))
});