Windows10安装Angular CLI7.1.4报错求助：readableHighWaterMark参数无效

Hey there, let's break down what's happening here and fix it step by step:

First, let's separate the two messages you're seeing:

• The fsevents warning: This is totally harmless! Fsevents is an optional dependency that only works on macOS systems. Since you're on Windows, npm correctly skips installing it—you can ignore this warning completely.
• The ERR_INVALID_OPT_VALUE error: This is the real issue stopping your installation. Here are the most reliable fixes:

1. Downgrade npm to a compatible version #

npm 6.9.0 has known compatibility quirks with older Angular CLI versions (like 7.1.4) when paired with Node.js 10.x. Let's roll back npm to version 6.4.1, which plays nicely with both:

1. Open Command Prompt or PowerShell with administrator privileges
2. Run this command to downgrade npm:

   npm install -g npm@6.4.1
   

3. Once that finishes, try installing Angular CLI again:

   npm install -g @angular/cli@7.1.4
   

2. Clear npm cache and retry #

Corrupted npm cache can cause weird, unexpected errors. Let's wipe it clean:

1. Run the cache clean command:

   npm cache clean --force
   

2. (Optional but recommended) Delete any leftover Angular CLI files from your global npm folder. The path will look like:
   C:\Users\<Your Username>\AppData\Roaming\npm\node_modules\@angular
3. Re-run the Angular CLI installation command:

   npm install -g @angular/cli@7.1.4
   

3. Use Yarn instead of npm (alternative approach) #

If the above methods don't work, Yarn often handles older package dependencies more smoothly. Give this a try:

1. First install Yarn globally (if you don't have it already):

   npm install -g yarn
   

2. Install Angular CLI 7.1.4 via Yarn:

   yarn global add @angular/cli@7.1.4
   

Verify your installation #

Once you've tried one of the above methods, confirm success by running:

ng --version

You should see Angular CLI version 7.1.4 listed if everything worked.

内容的提问来源于stack exchange，提问作者Mansoor H