MediaWiki:VisitorsIndicator.js

$(
  (function () {
  	const container = document.querySelector("#mw-indicator-visitors-container");
    const element = document.querySelector("#mw-indicator-visitors-count");
    if (!container || !element) return;

    const language = mw.config.get("wgPageContentLanguage");
    const pathname = location.pathname.replace(`/${language}`, "");
    const languages = [...document.querySelectorAll(".mw-pt-languages-list a")].map(({ lang }) => lang.toLowerCase());
    const alternatives = [pathname, `${pathname}/${language}`, ...languages.map((language) => `${pathname}/${language}`)];

    async function refresh() {
      const filters = [["is", "event:page", alternatives]];
      const query = new URLSearchParams({
        period: "realtime",
        filters: JSON.stringify(filters)
      });

      const value = (await fetch(`https://plausible.io/api/stats/wiki.vrchat.com/pages/?${query.toString()}`)
        .then((response) => response.json()))
        .catch(() => null);

      if (!value || typeof value !== "object" || !("results" in value) || !Array.isArray(value.results)) {
      	container.style.opacity = 0;
      	return;
      }

	  container.style.opacity = 1;
      element.textContent = value.results.reduce((prev, curr) => {
        prev += curr.visitors;
        return prev;
      }, 0);
    }

    refresh();
    setInterval(refresh, 1000)
  })()
);