one/dist/esm/router/diagnoseRouteLoadFailure.mjs

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

const MAX_MODULES = 500;
const TIMEOUT_MS = 5e3;
function collectImports(source, base) {
  const out = [];
  const add = spec => {
    if (!/^[./]|^https?:/.test(spec)) return;
    try {
      out.push(new URL(spec, base).href);
    } catch {}
  };
  for (const m of source.matchAll(/(?:^|[\s;}])(?:import|export)[^'"]{0,300}?from\s*["']([^"']+)["']/g)) add(m[1]);
  for (const m of source.matchAll(/\bimport\s*\(\s*["']([^"']+)["']\s*\)/g)) add(m[1]);
  for (const m of source.matchAll(/(?:^|[\s;}])import\s*["']([^"']+)["']/g)) add(m[1]);
  return out;
}
async function findBlockedModule(entryUrl) {
  const deadline = Date.now() + TIMEOUT_MS;
  const seen = /* @__PURE__ */new Set();
  let frontier = [new URL(entryUrl, window.location.href).href];
  while (frontier.length && seen.size < MAX_MODULES && Date.now() < deadline) {
    const batch = frontier.filter(url => !seen.has(url)).slice(0, 32);
    if (!batch.length) break;
    frontier = frontier.slice(batch.length);
    const results = await Promise.all(batch.map(async url => {
      seen.add(url);
      let res;
      try {
        res = await fetch(url);
      } catch {
        return {
          url,
          blocked: true,
          imports: []
        };
      }
      if (!res.ok) return {
        url,
        blocked: false,
        imports: []
      };
      const type = res.headers.get("content-type") ?? "";
      if (!type.includes("javascript")) return {
        url,
        blocked: false,
        imports: []
      };
      return {
        url,
        blocked: false,
        imports: collectImports(await res.text(), url)
      };
    }));
    for (const result of results) {
      if (result.blocked) return result.url;
      for (const next of result.imports) {
        if (!seen.has(next)) frontier.push(next);
      }
    }
  }
  return null;
}
async function diagnoseRouteLoadFailure(routeId, routeUrl) {
  const blocked = await findBlockedModule(routeUrl);
  if (!blocked) return null;
  const path = blocked.replace(window.location.origin, "");
  return [`Route "${routeId}" failed to load because this browser refused to fetch ${path}`, ``, `That request never reached the dev server, so a content blocker or privacy`, `extension is blocking it. In dev the module URL is the source path, and a`, `path containing a word like "analytics", "pageview" or "track" matches the`, `tracking rules those blockers ship.`, ``, `Rename the file or the directory so its path no longer matches, or allow`, `${window.location.origin} in the blocker.`].join("\n");
}
export { diagnoseRouteLoadFailure, findBlockedModule };
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