无法运行基础Ionic模板：报错Cannot find module 'fast-deep-equal'

Hey there, let's work through this issue step by step since you're new to Ionic. I notice you're running Ionic 3.19.1 alongside Node.js 5.4.2—this outdated Node version is almost certainly a key culprit here. Node 5.x reached end-of-life years ago, and Ionic 3 has strict compatibility requirements with newer (but still specific) Node versions, which leads to dependency conflicts and installation failures even after re-running npm install.

Here's a structured fix to get your app running:

1. Upgrade Node.js to a Compatible Version #

Ionic 3 works best with Node.js 8.x LTS (the long-term support version that was active when Ionic 3 was maintained). Using an outdated Node version breaks dependency resolution, so let's fix that first:

• Use Node Version Manager (nvm) to safely install and switch Node versions (this avoids system permission issues):
  • Install nvm if you don't have it, then run:

    nvm install 8.17.0
    nvm use 8.17.0
    

• Verify your Node version with node -v—it should show v8.17.0.

2. Fully Clean and Reinstall Dependencies #

Your current cleanup steps were a good start, but let's add a cache clear to ensure no corrupted packages linger:

• In your project directory (myApp1):

  rm -rf node_modules package-lock.json
  npm cache clean --force
  npm install
  

3. Reinstall Global Ionic/Cordova Packages #

Outdated global packages can also clash with your project's local dependencies. Let's refresh them:

npm uninstall -g ionic cordova
npm install -g ionic@3.19.1 cordova

4. Verify Environment and Test the App #

• Run ionic info to confirm all versions align: you should see Ionic 3.19.1, Node 8.17.0, and Cordova installed.
• Try running your app again with ionic serve (for browser) or ionic cordova run android/ios (for devices/emulators).

If the issue persists, try creating a fresh Ionic 3 blank project to rule out corrupted project files:

ionic start myApp1-new blank --type=ionic-angular
cd myApp1-new
ionic serve

内容的提问来源于stack exchange，提问作者Phani