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src/utils/chunk-reload.js

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+/**
+ * 懒加载 chunk / CSS preload 失败后的整页恢复。
+ * 常见于：部署后旧 hash 失效、静态服务空闲断连、代理 CONNECTION_RESET。
+ */
+
+const RELOAD_FLAG = 'app:chunk-reload-ts';
+const RELOAD_COOLDOWN_MS = 10000;
+
+const CHUNK_ERROR_RE =
+  /Failed to fetch dynamically imported module|Importing a module script failed|Unable to preload CSS|error loading dynamically imported module|Loading CSS chunk|Loading chunk .+ failed|ChunkLoadError/i;
+
+/** 最近一次路由跳转目标，供 onError 时整页落到正确地址 */
+let pendingFullPath = '';
+
+export function setPendingRoutePath(fullPath = '') {
+  pendingFullPath = fullPath || '';
+}
+
+export function isChunkLoadError(error) {
+  if (!error) return false;
+  const message = error.message || String(error);
+  return CHUNK_ERROR_RE.test(message);
+}
+
+/**
+ * @returns {boolean} 是否已触发刷新（冷却期内返回 false，避免死循环）
+ */
+export function reloadForChunkError(targetPath) {
+  const now = Date.now();
+  const last = Number(sessionStorage.getItem(RELOAD_FLAG) || 0);
+  if (now - last < RELOAD_COOLDOWN_MS) {
+    return false;
+  }
+  sessionStorage.setItem(RELOAD_FLAG, String(now));
+  const path = targetPath || pendingFullPath || window.location.pathname + window.location.search + window.location.hash;
+  window.location.assign(path);
+  return true;
+}