Gulp ngmin + uglify not working properly

All we need is an easy explanation of the problem, so here it is.

I have the following gulp task:

gulp.task('scripts', function() {
return gulp.src(['app/js/app.js', 'app/config/config.js', 'app/js/controllers.js', 'app/js/directives.js' , 'app/js/filters.js',  'app/js/footer.js',
                 'app/js/guideTour.js', 'app/js/mobileBanner.js', 'app/js/services.js', 'app/js/youtube.js', 'app/js/dataSync.js', 'app/js/addthis.js'])
//.pipe(jshint('.jshintrc'))
.pipe(jshint.reporter('default'))
.pipe(concat('main.js'))
.pipe(ngmin())
.pipe(gulp.dest('app/dist/js'))
.pipe(rename({suffix: '.min'}))
.pipe(uglify())
.pipe(gulp.dest('app/dist/js'))
.pipe(livereload(server))
.pipe(notify({ message: 'Scripts task complete' }));
});

The problem is that the concatenated file which is also the output of ngmin(), is working fine, but after uglifying the code, something breaks, and I get the following error.

With no specific indicator where to start debugging.

Stack trace:

Error: [$injector:unpr] http://errors.angularjs.org/1.2.9/$injector/unpr?p0=eProvider%20%3C-%20e
at Error (native)
at http://localhost:8000/angular/angular.min.js:6:449
at http://localhost:8000/angular/angular.min.js:32:125
at Object.c [as get] (http://localhost:8000/angular/angular.min.js:30:200)
at http://localhost:8000/angular/angular.min.js:32:193
at c (http://localhost:8000/angular/angular.min.js:30:200)
at Object.d [as invoke] (http://localhost:8000/angular/angular.min.js:30:417)
at http://localhost:8000/angular/angular-route.min.js:10:302
at Object.q [as forEach] (http://localhost:8000/angular/angular.min.js:7:380)
at http://localhost:8000/angular/angular-route.min.js:10:248 

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

Solution was running uglify task with mangle option set to false.
ie: .uglify({mangle: false})

whole code:

gulp.task('scripts', function() { 
return gulp.src('app/js/**/*.js')
.pipe(jshint('.jshintrc'))
.pipe(jshint.reporter('default'))
.pipe(concat('main.js'))
.pipe(ngmin())
.pipe(gulp.dest('app/dist/js'))
.pipe(rename({suffix: '.min'}))
.pipe(uglify({mangle: false}))
.pipe(gulp.dest('app/dist/js'))
.pipe(livereload(server))
.pipe(notify({ message: 'Scripts task complete' }));
});

Method 2

You don`t need to set mangle to false, you can just use ng-annotate and call on your gulpfile.js like this:

var ngAnnotate = require('gulp-ng-annotate')
...
gulp.task('scripts', function() { 
return gulp.src('app/js/**/*.js')
.pipe(jshint('.jshintrc'))
.pipe(jshint.reporter('default'))
.pipe(concat('main.js'))
.pipe(ngmin())
.pipe(gulp.dest('app/dist/js'))
.pipe(rename({suffix: '.min'}))
.pipe(ngAnnotate())
.pipe(uglify())
.pipe(gulp.dest('app/dist/js'))
.pipe(livereload(server))
.pipe(notify({ message: 'Scripts task complete' }));
});

works on my projects for app on a single file

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

Leave a Reply