How to fix "webpack Dev Server Invalid Options" in Vuejs

I have no idea why you're getting that error but here is how you'd configure that option:

1. Create vue.config.js in your root directory

2. Enter the following into it:

module.exports = {
  devServer: {
    clientLogLevel: 'debug'
  }
}

3. Rerun npm run serve

You can read more about configuring the dev server here.

yea this issue just popped up in the last few hours in @vue/cli. I had the same thing in a fresh project. To fix it try this:

Create a file in the root of your project called vue.config.js if you don't already have that file.
Add this to that file:

module.exports = {
  devServer: {
    clientLogLevel: 'info'
  }
};

Then re-run your project. Something happened last night where the clientLogLevel value that comes preset became incorrect.

Here's a thread talking about this issue: GitHub.

Remove node_modules folder and npm install agani

rm -rf node_modules

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