remove polyfill code

Author: mydea

packages/tracing-internal/src/browser/web-vitals/getFID.ts

@@ -14,21 +14,14 @@
  * limitations under the License.
  */
 
-import { WINDOW } from '../types';
 import { bindReporter } from './lib/bindReporter';
 import { getVisibilityWatcher } from './lib/getVisibilityWatcher';
 import { initMetric } from './lib/initMetric';
 import { observe } from './lib/observe';
 import { onHidden } from './lib/onHidden';
 import { runOnce } from './lib/runOnce';
 import { whenActivated } from './lib/whenActivated';
-import type {
-  FIDMetric,
-  FIDReportCallback,
-  FirstInputPolyfillCallback,
-  MetricRatingThresholds,
-  ReportOpts,
-} from './types';
+import type { FIDMetric, FIDReportCallback, MetricRatingThresholds, ReportOpts } from './types';
 
 /** Thresholds for FID. See https://web.dev/articles/fid#what_is_a_good_fid_score */
 export const FIDThresholds: MetricRatingThresholds = [100, 300];
@@ -73,15 +66,5 @@ export const onFID = (onReport: FIDReportCallback, opts: ReportOpts = {}): void
         }),
       );
     }
-
-    if (WINDOW.__WEB_VITALS_POLYFILL__) {
-      // eslint-disable-next-line no-console
-      console.warn('The web-vitals "base+polyfill" build is deprecated. See: https://bit.ly/3aqzsGm');
-
-      // Prefer the native implementation if available,
-      if (!po) {
-        WINDOW.webVitals.firstInputPolyfill(handleEntry as FirstInputPolyfillCallback);
-      }
-    }
   });
 };

packages/tracing-internal/src/browser/web-vitals/lib/getNavigationEntry.ts

@@ -17,35 +17,6 @@
 import { WINDOW } from '../../types';
 import type { NavigationTimingPolyfillEntry } from '../types';
 
-const getNavigationEntryFromPerformanceTiming = (): NavigationTimingPolyfillEntry => {
-  // eslint-disable-next-line deprecation/deprecation
-  const timing = performance.timing;
-  // eslint-disable-next-line deprecation/deprecation
-  const type = performance.navigation.type;
-
-  const navigationEntry: { [key: string]: number | string } = {
-    entryType: 'navigation',
-    startTime: 0,
-    type: type == 2 ? 'back_forward' : type === 1 ? 'reload' : 'navigate',
-  };
-
-  for (const key in timing) {
-    if (key !== 'navigationStart' && key !== 'toJSON') {
-      // eslint-disable-next-line deprecation/deprecation
-      navigationEntry[key] = Math.max((timing[key as keyof PerformanceTiming] as number) - timing.navigationStart, 0);
-    }
-  }
-  return navigationEntry as unknown as NavigationTimingPolyfillEntry;
-};
-
 export const getNavigationEntry = (): PerformanceNavigationTiming | NavigationTimingPolyfillEntry | undefined => {
-  if (WINDOW.__WEB_VITALS_POLYFILL__) {
-    return (
-      WINDOW.performance &&
-      ((performance.getEntriesByType && performance.getEntriesByType('navigation')[0]) ||
-        getNavigationEntryFromPerformanceTiming())
-    );
-  } else {
-    return WINDOW.performance && performance.getEntriesByType && performance.getEntriesByType('navigation')[0];
-  }
+  return WINDOW.performance && performance.getEntriesByType && performance.getEntriesByType('navigation')[0];
 };

packages/tracing-internal/src/browser/web-vitals/lib/getVisibilityWatcher.ts

@@ -65,15 +65,8 @@ export const getVisibilityWatcher = () => {
     // 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.
-    if (WINDOW.__WEB_VITALS_POLYFILL__) {
-      firstHiddenTime = WINDOW.webVitals.firstHiddenTime;
-      if (firstHiddenTime === Infinity) {
-        addChangeListeners();
-      }
-    } else {
-      firstHiddenTime = initHiddenTime();
-      addChangeListeners();
-    }
+    firstHiddenTime = initHiddenTime();
+    addChangeListeners();
   }
   return {
     get firstHiddenTime() {

packages/tracing-internal/src/browser/web-vitals/types.ts

@@ -39,9 +39,6 @@ export interface WebVitalsGlobal {
 declare global {
   interface Window {
     webVitals: WebVitalsGlobal;
-
-    // Build flags:
-    __WEB_VITALS_POLYFILL__: boolean;
   }
 }