one/dist/esm/skewProtection.mjs

One is a new React Framework that makes Vite serve both native and web.

import { CACHE_KEY } from "./constants.mjs";
import { getURL } from "./getURL.mjs";
import { handleSkewError } from "./utils/dynamicImport.mjs";
let stale = false;
let polling = null;
let inFlightCheck = null;
function isVersionStale() {
  if (stale) return true;
  if (typeof window !== "undefined" && window.__oneVersionStale) return true;
  return false;
}
function markStale(version) {
  stale = true;
  if (typeof window !== "undefined") {
    ;
    window.__oneVersionStale = true;
    window.dispatchEvent(new CustomEvent("one-version-update", {
      detail: {
        version
      }
    }));
  }
}
function checkSkewAndReload() {
  if (typeof window === "undefined") return Promise.resolve(false);
  if (process.env.ONE_SKEW_PROTECTION === "false") return Promise.resolve(false);
  if (isVersionStale()) {
    handleSkewError();
    return Promise.resolve(true);
  }
  if (inFlightCheck) return inFlightCheck;
  inFlightCheck = (async () => {
    try {
      const res = await fetch(`${getURL()}/version.json`, {
        headers: {
          "cache-control": "no-cache",
          pragma: "no-cache"
        }
      });
      if (!res.ok) return false;
      const data = await res.json();
      if (data.version && data.version !== CACHE_KEY) {
        markStale(data.version);
        handleSkewError();
        return true;
      }
      return false;
    } catch {
      return false;
    } finally {
      inFlightCheck = null;
    }
  })();
  return inFlightCheck;
}
function setupSkewProtection() {
  if (typeof window === "undefined") return;
  if (process.env.NODE_ENV === "development") return;
  if (process.env.ONE_SKEW_PROTECTION !== "proactive") return;
  const POLL_INTERVAL = 12e4;
  const baseUrl = getURL();
  async function check() {
    try {
      const res = await fetch(`${baseUrl}/version.json`, {
        headers: {
          "cache-control": "no-cache",
          pragma: "no-cache"
        }
      });
      if (!res.ok) {
        polling = setTimeout(check, POLL_INTERVAL);
        return;
      }
      const data = await res.json();
      if (data.version !== CACHE_KEY) {
        markStale(data.version);
        return;
      }
    } catch {}
    polling = setTimeout(check, POLL_INTERVAL);
  }
  polling = setTimeout(check, POLL_INTERVAL);
}
export { checkSkewAndReload, isVersionStale, setupSkewProtection };
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