How to Build a What Is Calculator

// Harvest 'what is' queries with expansion
  async function getWhatIsQueries(seed, options = {}) {
  const { includeRelated = true, alphabet = true } = options;
  const queries = [`what is ${seed}`, `what is a ${seed}`, `what is the ${seed}`];

  // Alphabet expansion: "what is a" through "what is z"
  if (alphabet) {
    for (let c = 97; c <= 122; c++) {
      queries.push(`what is ${seed} ${String.fromCharCode(c)}`);
    }
  }

  const allSuggestions = [];
  for (const q of queries) {
    const suggestions = await fetchAutocompleteSuggestions(q);
    allSuggestions.push(...suggestions);
  }

  const unique = [...new Set(allSuggestions)];

  return unique.map(query => ({
    query,
    type: categorizeWhatIs(query),
    contentFormat: suggestFormat(query),
    snippetPotential: estimateSnippetChance(query)
  }));
  }

  function categorizeWhatIs(query) {
  if (query.match(/what is (a|an|the) /)) return 'definition';
  if (query.includes('vs') || query.includes('versus')) return 'comparison';
  if (query.includes('used for') || query.includes('purpose')) return 'utility';
  if (query.includes('example')) return 'illustrative';
  if (query.includes('best') || query.includes('top')) return 'recommendation';
  return 'general';
  }

  function suggestFormat(query) {
  const q = query.toLowerCase();
  if (q.includes('vs')) return 'comparison-table';
  if (q.includes('example')) return 'listicle';
  if (q.includes('how') || q.includes('work')) return 'explainer-with-diagram';
  return 'definition-paragraph';
  }