Quiero agregar el comando minify para usar en el proyecto Ionic 2. Después de leer este manual https://github.com/driftyco/ionic-app-scripts . Agrego la sección necesaria a package.json.

 "scripts": { "clean": "ionic-app-scripts clean", "build": "ionic-app-scripts build", "minify": "ionic-app-scripts minify", "ionic:build": "ionic-app-scripts build", "ionic:serve": "ionic-app-scripts serve" }

Ejecute npm ejecute minify . Y ocurre un error:

 > MobileSiteApp@ minify D:\denwerready\-readyscript\modules\mobilesiteapp\appsou rce > ionic-app-scripts minify [14:13:05] ionic-app-scripts 1.3.2 [14:13:05] minify started ... [14:13:05] cleancss started ... [14:13:05] uglifyjs started ... [14:13:06] ionic-app-script task: "minify" [14:13:06] Error: Cannot read property 'filter' of undefined in undefined at li ne undefined, col undefined, pos undefined Error: Cannot read property 'filter' of undefined in undefined at line undefined , col undefined, pos undefined at new BuildError (D:\denwerready\-readyscript\modules\mobilesiteapp\appsour ce\node_modules\@ionic\app-scripts\dist\util\errors.js:16:28) at taskReject (D:\denwerready\-readyscript\modules\mobilesiteapp\appsource\n ode_modules\@ionic\app-scripts\dist\worker-process.js:36:22) at D:\denwerready\-readyscript\modules\mobilesiteapp\appsource\node_modules\ @ionic\app-scripts\dist\worker-process.js:14:13 at process._tickCallback (internal/process/next_tick.js:109:7) npm ERR! Windows_NT 6.3.9600 npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\ node_modules\\npm\\bin\\npm-cli.js" "run" "minify" npm ERR! node v7.9.0 npm ERR! npm v4.2.0 npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! MobileSiteApp@ minify: `ionic-app-scripts minify` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the MobileSiteApp@ minify script 'ionic-app-scripts minify'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the MobileSiteApp package , npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! ionic-app-scripts minify npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs MobileSiteApp npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls MobileSiteApp npm ERR! There is likely additional logging output above. npm ERR! Please include the following file with any support request: npm ERR! C:\Users\Чубзик\AppData\Roaming\npm-cache\_logs\2017-04-26T11_13_06 _136Z-debug.log

¿Como arreglarlo? Tengo los últimos Ionic v.3 y ionic-app-script v.1.3.2