RandomTitleGenerator.js

// Instructions: at codesandbox.io, create a Vanilla JS sandbox,
// and paste this file into index.js

import './styles.css';

const Languages = [
  'JavaScript',
  'TypeScript',
  'Python',
  'Ruby',
  'C',
  'C++'
];

const Expressions = ['😍', '🤣', '💀'];

const Adjectives = [
  'Awesome',
  'The Worst',
  'Optimized',
  'Amazing',
];

const zeroBasedRandomizer = (max) => Math.floor(Math.random() * max)

const itemFromList = (
  list,
  chooser = zeroBasedRandomizer
) => {
  const index = chooser(list.length);
  const item = list[index];

  return item;  
}

const topicGenerator = (
  languages   = Languages,
  expressions = Expressions,
  adjectives  = Adjectives
) => {
  const adjective   = itemFromList(adjectives);
  const language    = itemFromList(languages);
  const expression  = itemFromList(expressions);

  return `${adjective} ${language} ${expression}`;
}

const html = `<h1>${topicGenerator()}</h1>`;

// Find HTML element "app" and set the html;
document.getElementById("app").innerHTML = html;