Wikimedia project count.

wikimedia-project-count.js

const includeClosed = false;
const includeFishbowl = false;
const includePrivate = false;
const includeNonglobal = false;

fetch("https://meta.wikimedia.org/w/api.php?action=sitematrix&format=json&formatversion=2")
  .then(r => r.json())
  .then(({ sitematrix }) => {
    let count = 0;
    if (includeClosed && includeFishbowl && includePrivate && includeNonglobal)
      return sitematrix.count;
  
    for (const lang of Object.values(sitematrix)) {
      if (lang.site) {
        count += lang.site
          .filter(v => includeClosed || !v.closed)
          .filter(v => includeFishbowl || !v.fishbowl)
          .filter(v => includePrivate || !v.private)
          .filter(v => includeNonglobal || !v.nonglobal)
          .length;
      } else if (Array.isArray(lang)) {
        // specials
        count += lang
          .filter(v => includeClosed || !v.closed)
          .filter(v => includeFishbowl || !v.fishbowl)
          .filter(v => includePrivate || !v.private)
          .filter(v => includeNonglobal || !v.nonglobal)
          .length;
      }
    }
    return count;
  })
  .then(console.log.bind(null, "Count: "));