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ionic serve: @ionic/app-scripts isn't installed in this project, but it is.

See original GitHub issue

Description: ionic serve: @ionic/app-scripts isn’t installed in this project, but it is. I started having the issue right after upgrading ionic-cli

Steps to Reproduce: Update from ionic@3.9.2 to ionic@4.0.1 On a project created with ionic@3.9.2

Output:

ERROR] @ionic/app-scripts is required for ionic serve to work properly.

        Looks like @ionic/app-scripts isn't installed in this project.

        This package is required for ionic serve in ionic/angular 4 projects.

ioni My ionic info: I was downgrading while creating this question…Didn’t see this. Sorry. This is the info after downgrade:

cli packages: (C:\nvm\v6.14.2\node_modules)

    @ionic/cli-utils  : 1.9.2
    ionic (Ionic CLI) : 3.9.2

global packages:

    Cordova CLI : not installed
    Gulp CLI    : not installed globally

local packages:

    @ionic/app-scripts : 3.1.10
    Cordova Platforms  : none
    Ionic Framework    : ionic-angular 3.9.2

System:

    Node : v6.14.2
    npm  : 3.10.10
    OS   : Windows 10

Other Information: When I downgraded I simply ran npm i -g ionic@3.9.2

Issue Analytics

State:
Created 5 years ago
Comments:21 (8 by maintainers)

Top GitHub Comments

3reactions

imhoffdcommented, Jul 31, 2018

Thank you @devcenter

Does this solution work for anyone else, then?

rm -rf node_modules package-lock.json
npm install

0reactions

imhoffdcommented, Aug 2, 2018

It is not advisable to run npm install (or many other commands) with sudo or administrator rights. Especially running npm install with admin rights, because it writes thousands of files that are not owned by your user, leading to further permission errors.

Errors that look like they’re related to permission errors are caused by invalid permissions. I would amend @Jordi-Carrasco’s steps by only removing files and folders with administrator rights and running npm install as your own user.

The solution to this issue is here: https://github.com/ionic-team/ionic-cli/issues/3399#issuecomment-409279484

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