Edit in JSFiddle

grunt.initConfig({ 
	ts: { 
        default: { 
          src: ['scripts/**/*.ts'], 
          noImplicitAny: true, 
          sourceMap: true, 
          target: 'es5', 
          fast: 'always', 
          comments: true, 
          sortOutput: true, 
          noExternalResolve: true 
        } 
	} 
}); 

grunt.registerTask('default', ['ts']);