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Exercise 3

  • Create the following folder/file structure: 
    /ex_3
  |-- index.js
  |-- package.json

Todo

  • Add the following files to the folder:

    • index.js

      const oneLinerJoke = require("one-liner-joke");
const express = require("express");
const app = express();
const port = process.env.PORT || 3000;

app.get("/", (req, res) => {
  const getRandomJoke = oneLinerJoke.getRandomJoke();
  const response = getRandomJoke.text.toUpperCase();
  res.json(response);
});

app.listen(port, () => console.log(`Open at http://localhost:${port}`));

    • package.json

      {
  "name": "ex_3",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "nodemon"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.17.1",
    "nodemon": "^2.0.2",
    "one-liner-joke": "^1.2.0"
  }
}

  • Run the application using npm start

  • Resolve the following error in terminal

    TypeError: Cannot read property 'toUpperCase' of undefined
  at app.get (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/index.js:8:39)
  at Layer.handle [as handle_request] (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/layer.js:95:5)
  at next (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/route.js:137:13)
  at Route.dispatch (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/route.js:112:3)
  at Layer.handle [as handle_request] (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/layer.js:95:5)
  at /Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/index.js:281:22
  at Function.process_params (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/index.js:335:12)
  at next (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/index.js:275:10)
  at expressInit (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/middleware/init.js:40:5)
  at Layer.handle [as handle_request] (/Users/davidcrossman/Development/web/nodeyqr-exercises/debug/ex_3/node_modules/express/lib/router/layer.js:95:5)

index.js

  • Once we start the project it will otuput the following message: 
    Open at http://localhost:3000
  • The page should load with the joke in uppercase from one line jokes