code: function (context) {
  		var file = context.file;
  
  		try {
  			var ast = parser.parse(file.data);
  
  			ast = uglify.ast_mangle(ast, {
  				except: [ 'require' ]
  			});
  			ast = uglify.ast_squeeze(ast);
  
  			file.data = uglify.gen_code(ast) + ';';
  		} catch (err) {
  			context.error('JS syntax error: "%s" (line %s, col %s)',
  				file.pathname, err.line, err.col);
  			file.data += ';'
  		}
  	}
docs: Minify JS.
  @param context {Object}