ionic serve Cannot find module 'typescript'

[jgw96]

From @kgsyz on December 14, 2016 3:17

Ionic version: (check one with "x")

2.x

D:\project\helloWorld>ionic serve

ionic-app-base@ ionic:serve D:\project\helloWorld
ionic-app-scripts serve

module.js:442
throw err;
^

Error: Cannot find module 'typescript'
at Function.Module._resolveFilename (module.js:440:15)
at Function.Module._load (module.js:388:25)
at Module.require (module.js:468:17)
at require (internal/module.js:20:19)
at Object. (D:\project\helloWorld\node_modules.0.0.47@@Ionic\app
-scripts\dist\util\typescript-utils.js:2:20)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
at Module.load (module.js:458:32)
at tryModuleLoad (module.js:417:12)
at Function.Module._load (module.js:409:3)

npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\
node_modules\npm\bin\npm-cli.js" "run" "ionic:serve" "--"
npm ERR! node v6.2.0
npm ERR! npm v3.8.9
npm ERR! code ELIFECYCLE
npm ERR! ionic-app-base@ ionic:serve: ionic-app-scripts serve
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the ionic-app-base@ ionic:serve script 'ionic-app-scripts ser
ve'.
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 ionic-app-base packag
e,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! ionic-app-scripts serve
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs ionic-app-base
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls ionic-app-base
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! D:\project\helloWorld\npm-debug.log
There was an error serving your Ionic application: There was an error with the s
pawned command: serve

Copied from original issue: ionic-team/ionic-framework#9626

[danbucholtz]

@kgsyz,

Can you provide more info? Please fill out our issue template.

**Note: for support questions, please use one of these channels:**

https://forum.ionicframework.com/
http://ionicworldwide.herokuapp.com/


#### Short description of the problem:


#### What behavior are you expecting?


**Steps to reproduce:**
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insert any relevant code between the above and below backticks

**Which @ionic/app-scripts version are you using?**


**Other information:** (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)

Thanks,
Dan

[waybackrider]

Having the same Problem after upgrading to 0.0.47

npm install @ionic/app-scripts@latest --save-dev already had an UNMET PEER DEPENDENCY error:
UNMET PEER DEPENDENCY typescript@>=1.7.3

typescript@2.0.10 is installed in node_modules/typescript

Do i need a separate typescript Version for 0.0.47?

[waybackrider]

my solution was to simply run "npm install" which installed typescript 2.0.6 locally in node_modules/typescript for this project, which was not present until now.
typescript 2.0.10 ist the globally installed version, maybe from VSCode.
Is there a Recommendation to use typescript globally or should it be avoided?
And why did it work before 0.0.47?

[danbucholtz]

@waybackrider,

No idea 😄 . TypeScript should have always been in the package.json file.

Thanks,
Dan

[Isanderthul]

did you do a npm install?

[Isanderthul]

you might also need npm install @ionic/app-scripts@latest --save-dev