Specifying Whitespace Only Parameter for UglifyJS2

I am trying to use grunt to minify javascript files in a project using UglifyJS2.

Does UglifyJS2 have any options like WHITESPACE_ONLY (which exists in the Closure compiler)?

What are the values ​​I need to pass in node parameters in GruntFile.js for this effect?

uglify: {
        options: {
            mangle: { toplevel: false },
            squeeze: { dead_code: false }
        },
        'dist': {
            src: '**/*.js',
            dest: '**/*.js'
        }
    }