From 434aa8343fdcbb4d5002f934979913c099489bee Mon Sep 17 00:00:00 2001
From: altaf-creator <dev@altafcreator.com>
Date: Sun, 16 Nov 2025 19:08:29 +0800
Subject: sdk, del

---
 .../web-vitals/src/lib/getVisibilityWatcher.ts     | 89 ----------------------
 1 file changed, 89 deletions(-)
 delete mode 100644 frontend-old/node_modules/web-vitals/src/lib/getVisibilityWatcher.ts

(limited to 'frontend-old/node_modules/web-vitals/src/lib/getVisibilityWatcher.ts')

diff --git a/frontend-old/node_modules/web-vitals/src/lib/getVisibilityWatcher.ts b/frontend-old/node_modules/web-vitals/src/lib/getVisibilityWatcher.ts
deleted file mode 100644
index ad7b1c3..0000000
--- a/frontend-old/node_modules/web-vitals/src/lib/getVisibilityWatcher.ts
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright 2020 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import {onBFCacheRestore} from './bfcache.js';
-
-let firstHiddenTime = -1;
-
-const initHiddenTime = () => {
-  // If the document is hidden when this code runs, assume it was always
-  // hidden and the page was loaded in the background, with the one exception
-  // that visibility state is always 'hidden' during prerendering, so we have
-  // to ignore that case until prerendering finishes (see: `prerenderingchange`
-  // event logic below).
-  return document.visibilityState === 'hidden' && !document.prerendering
-    ? 0
-    : Infinity;
-};
-
-const onVisibilityUpdate = (event: Event) => {
-  // If the document is 'hidden' and no previous hidden timestamp has been
-  // set, update it based on the current event data.
-  if (document.visibilityState === 'hidden' && firstHiddenTime > -1) {
-    // If the event is a 'visibilitychange' event, it means the page was
-    // visible prior to this change, so the event timestamp is the first
-    // hidden time.
-    // However, if the event is not a 'visibilitychange' event, then it must
-    // be a 'prerenderingchange' event, and the fact that the document is
-    // still 'hidden' from the above check means the tab was activated
-    // in a background state and so has always been hidden.
-    firstHiddenTime = event.type === 'visibilitychange' ? event.timeStamp : 0;
-
-    // Remove all listeners now that a `firstHiddenTime` value has been set.
-    removeChangeListeners();
-  }
-};
-
-const addChangeListeners = () => {
-  addEventListener('visibilitychange', onVisibilityUpdate, true);
-  // IMPORTANT: when a page is prerendering, its `visibilityState` is
-  // 'hidden', so in order to account for cases where this module checks for
-  // visibility during prerendering, an additional check after prerendering
-  // completes is also required.
-  addEventListener('prerenderingchange', onVisibilityUpdate, true);
-};
-
-const removeChangeListeners = () => {
-  removeEventListener('visibilitychange', onVisibilityUpdate, true);
-  removeEventListener('prerenderingchange', onVisibilityUpdate, true);
-};
-
-export const getVisibilityWatcher = () => {
-  if (firstHiddenTime < 0) {
-    // If the document is hidden when this code runs, assume it was hidden
-    // since navigation start. This isn't a perfect heuristic, but it's the
-    // best we can do until an API is available to support querying past
-    // visibilityState.
-    firstHiddenTime = initHiddenTime();
-    addChangeListeners();
-
-    // Reset the time on bfcache restores.
-    onBFCacheRestore(() => {
-      // Schedule a task in order to track the `visibilityState` once it's
-      // had an opportunity to change to visible in all browsers.
-      // https://bugs.chromium.org/p/chromium/issues/detail?id=1133363
-      setTimeout(() => {
-        firstHiddenTime = initHiddenTime();
-        addChangeListeners();
-      }, 0);
-    });
-  }
-  return {
-    get firstHiddenTime() {
-      return firstHiddenTime;
-    },
-  };
-};
-- 
cgit v1.2.3