Grunt description file to minify every Javascript file and put it beside its sources file

Gruntfile.js

module.exports = function(grunt) {

  // Project configuration.
	grunt.initConfig(
	{
    pkg: grunt.file.readJSON('package.json'),
		
		
    uglify:
    {
      options:
      {
        banner: '/*! <%= pkg.name %> <%= grunt.template.today("yyyy-mm-dd") %> */\n'
      },
      build:
      {
        expand:true,
        src: ['<%= pkg.target %>**/*.js', '!<%= pkg.target %>**/*.min.js'],
        dest: './',
        ext:'.min.js'
      }
    },
    watch:
    {
      scripts:
      {
        files: ['<%= pkg.target %>**/*.js', '!<%= pkg.target %>**/*.min.js'],
        tasks: ['uglify'],
        options:
        {
          spawn: false,
        },
      }
    }
	});

  // Load the plugin that provides the "uglify" task.
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-watch');

  // Default task(s);
  grunt.registerTask('default', ['uglify', 'watch']);
};

package.json

{
  "name": "Project Name",
  "version": "1.0.0",
  "target": "src\/",
  "devDependencies":
  {
    "grunt": "~0.4.5",
    "grunt-contrib-uglify": "~0.5.0",
    "grunt-contrib-watch": "^0.6.1"
  }
}

@behrooz-tahanzadeh nobody uses grunt anymore! try gulp! :)) npm install --save-dev gulp-minify