Uglify an anonymous function

[waitingduck]

Hi, I happen to have a problem when uglify an anonymous function. I am developing a chrome extension, and I need to insert a script to some webpage to retrieve some information(like width and height).

So If I have a script someScript.js

(function() {
   //do something here
   return {
      //some object
   }
}());

After I uglify with this code

pipes.moveProdScripts = function() {
    return gulp.src(paths.scripts)
        .pipe(babel({presets: [es2015]}))
        .pipe(plugins.uglify({mangle: false}))
        .pipe(gulp.dest('dist'));
};

I will get

!function() {
   // do something here
   return {
      //some object
   }
}();

The above code will return false whatever it return inside the function.

Is there any work around to keep it not using "!" but still minify the code?

gulp version: 3.9.1
gulp-uglify version: 2.0.0

Thanks you

[terinjokes]

Try passing options similar to the following:

var opts = {
  compress: {
    negate_iife: false
  }
};