Angular4中npm run setup报错及ng2-datetimepicker样式引入失败求助

Let's break down your problems and fix them step by step:

1. Fixing the "Module not found" Error for the Datepicker CSS #

First off, that error looks like a mix-up between package names and file paths. You mentioned using ng2-datetimepicker from npm, but your import is pointing to ngx-datetime-picker—those are two different packages! Here's how to fix this:

• Verify your installed package: Check your node_modules folder to confirm the actual package name. If you installed ng2-datetimepicker, the folder should be named exactly that, not ngx-datetime-picker.
• Correct the CSS import path:
  Open your transaction.component.ts and update the import statement to match the correct path for ng2-datetimepicker. For most versions, the CSS is located at:

  import '../node_modules/ng2-datetimepicker/assets/css/ng2-datetimepicker.css';
  

• Alternative: Add CSS to Angular config: Instead of importing in the component, you can add the CSS path to your .angular-cli.json (since you're on Angular 4) under the styles array:

  "styles": [
    "styles.css",
    "../node_modules/ng2-datetimepicker/assets/css/ng2-datetimepicker.css"
  ]
  

• Double-check package installation: If the correct folder doesn't exist in node_modules, re-install the package with:

  npm uninstall ngx-datetime-picker ng2-datetimepicker
  npm install ng2-datetimepicker --save
  

2. Troubleshooting npm run setup Errors in Angular 4 #

Since you didn't share the exact error message from npm run setup, here are the most common fixes for this kind of issue:

• Check the setup script definition: Open your package.json and look at what the setup script is actually running. It might be a custom command (like installing dependencies, running migrations, or building assets) that's failing. For example, if it's "setup": "npm install && ng build", we can narrow down which part is breaking.
• Clean and re-install dependencies: Corrupted node_modules or lock files are a frequent culprit. Run these commands in your project root:

  rm -rf node_modules package-lock.json
  npm install
  

• Validate Node.js version: Angular 4 requires Node.js 6.x or 8.x (avoid newer versions like 10+ as they can cause compatibility issues). Check your version with node -v and downgrade if needed using a version manager like nvm.
• Check for missing dependencies: If the setup script uses tools like typings or custom scripts, make sure those packages are installed either globally or as dev dependencies in your project.
• Run the script with verbose output: Get more details about the error by running:

  npm run setup --verbose
  

  This will show you exactly where the script is failing, making it easier to fix.

内容的提问来源于stack exchange，提问作者user9630712