uglifier about browserify HOT 4 CLOSED

var bundle = browserify({
    entry: "browser_entry.js",
    filter: function(code) {
        if (cmdline.options.uglify) {
            var uglifyjs = require("uglify-js"),
                parser = uglifyjs.parser,
                uglify = uglifyjs.uglify;

            var ast = parser.parse(code);
            ast = uglify.ast_mangle(ast);
            ast = uglify.ast_squeeze(ast);
            return uglify.gen_code(ast);
        }
        else {
            return code;
        }
    },
});

    bundle.register('post', function (body) {
        return uglify.minify(body, {
            'fromString': true
        }).code;
    });