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JavaScript Middleware Basics

Brian Crowe
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Brian Crowe
Full Stack JavaScript v2 Techdegree Student 8,863 Points
Posted by Brian Crowe
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Brian Crowe
Full Stack JavaScript v2 Techdegree Student 8,863 Points

If you keep getting a TypeError while trying to run the server...

I kept getting the following error when trying to run the server-side:

"TypeError: Cannot read properties of undefined (reading 'last-modified')"

It kept referencing "fresh" and "serve-static", having a problem accessing the given /public/stylesheets/style.css file. I solved the problem by running the following commands to delete the node_modules and package-lock.json files:

    rm -rf node_modules
    rm package-lock.json

And updating my package.json file to the following:

{
  "name": "understanding-express-middleware-2",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "start": "node ./bin/www"
  },
  "dependencies": {
    "body-parser": "^1.20.2",
    "debug": "^4.3.4",
    "express": "^4.19.2",
    "pug": "^3.0.3"
  }
}

Then I reran npm install. This updated the dependencies to work with more modern browsers like Brave. I have no experience with other browsers, but I was able to complete the lessons after doing this.

Rich Donnellan
Rich Donnellan
Treehouse Moderator 27,740 Points
Rich Donnellan
Rich Donnellan
Treehouse Moderator 27,740 Points

Updated your question with better syntax highlighting (gave the backticks a hint; e.g. sh or json).