Ionic v4项目创建咨询：已升级CLI后依赖版本疑问

Hey there! I see you've got Ionic CLI v4.0.0-rc.5 installed, but your new blank project is still pulling in Angular 5 dependencies—let's sort this out right away.

The main issue here is almost certainly cached old templates from earlier Ionic v4 beta/RC builds that were tied to Angular 5. Here's how to fix it step by step:

• Force a clean template fetch when creating the project
  Instead of the standard ionic start command, add the --clean flag to make the CLI bypass cached templates and pull the latest ones matching your CLI version:

  ionic start newproj blank --clean
  

• Manually specify the matching template version (if clean mode fails)
  Explicitly link to the @ionic/angular-templates package that aligns with your CLI version to guarantee compatibility:

  ionic start newproj blank --type=angular --template=@ionic/angular-templates@4.0.0-rc.5
  

• Reset your global Ionic installation (for persistent cache issues)
  If the above steps don't work, wipe the global setup and cache entirely:

  1. Uninstall the global Ionic CLI:

     npm uninstall -g ionic
     

  2. Clear your npm cache to remove leftover cached packages:

     npm cache clean --force
     

  3. Reinstall the RC.5 version:

     npm install -g ionic@4.0.0-rc.5
     

  4. Create your project again using the --clean flag from the first step.

After following these steps, check your project's package.json—you should see @ionic/angular at version 4.0.0-rc.5 and Angular dependencies (like @angular/core) at version 6.x (e.g., 6.1.10), which is the correct pairing for Ionic v4 RC.5.

内容的提问来源于stack exchange，提问作者krv