diff --git a/src/global.tsx b/src/global.tsx
new file mode 100644
index 0000000..afa1fab
--- /dev/null
+++ b/src/global.tsx
@@ -0,0 +1,91 @@
+import { useIntl } from '@umijs/max';
+import { Button, message, notification } from 'antd';
+import defaultSettings from '../config/defaultSettings';
+
+const { pwa } = defaultSettings;
+const isHttps = document.location.protocol === 'https:';
+
+const clearCache = () => {
+  // remove all caches
+  if (window.caches) {
+    caches
+      .keys()
+      .then((keys) => {
+        keys.forEach((key) => {
+          caches.delete(key);
+        });
+      })
+      .catch((e) => console.log(e));
+  }
+};
+
+// if pwa is true
+if (pwa) {
+  // Notify user if offline now
+  window.addEventListener('sw.offline', () => {
+    message.warning(useIntl().formatMessage({ id: 'app.pwa.offline' }));
+  });
+
+  // Pop up a prompt on the page asking the user if they want to use the latest version
+  window.addEventListener('sw.updated', (event: Event) => {
+    const e = event as CustomEvent;
+    const reloadSW = async () => {
+      // Check if there is sw whose state is waiting in ServiceWorkerRegistration
+      // https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration
+      const worker = e.detail && e.detail.waiting;
+      if (!worker) {
+        return true;
+      }
+      // Send skip-waiting event to waiting SW with MessageChannel
+      await new Promise((resolve, reject) => {
+        const channel = new MessageChannel();
+        channel.port1.onmessage = (msgEvent) => {
+          if (msgEvent.data.error) {
+            reject(msgEvent.data.error);
+          } else {
+            resolve(msgEvent.data);
+          }
+        };
+        worker.postMessage({ type: 'skip-waiting' }, [channel.port2]);
+      });
+
+      clearCache();
+      window.location.reload();
+      return true;
+    };
+    const key = `open${Date.now()}`;
+    const btn = (
+      <Button
+        type="primary"
+        onClick={() => {
+          notification.destroy(key);
+          reloadSW();
+        }}
+      >
+        {useIntl().formatMessage({ id: 'app.pwa.serviceworker.updated.ok' })}
+      </Button>
+    );
+    notification.open({
+      message: useIntl().formatMessage({ id: 'app.pwa.serviceworker.updated' }),
+      description: useIntl().formatMessage({ id: 'app.pwa.serviceworker.updated.hint' }),
+      btn,
+      key,
+      onClose: async () => null,
+    });
+  });
+} else if ('serviceWorker' in navigator && isHttps) {
+  // unregister service worker
+  const { serviceWorker } = navigator;
+  if (serviceWorker.getRegistrations) {
+    serviceWorker.getRegistrations().then((sws) => {
+      sws.forEach((sw) => {
+        sw.unregister();
+      });
+    });
+  }
+  serviceWorker.getRegistration().then((sw) => {
+    if (sw) sw.unregister();
+  });
+
+  clearCache();
+}