object.assign attributions

src/attribution/onCLS.ts

@@ -53,9 +53,8 @@ const attributeCLS = (metric: CLSMetric): CLSMetricWithAttribution => {
     }
   }
 
-  // Cast to attribution metric so it can be populated.
-  const metricWithAttribution = metric as CLSMetricWithAttribution;
-  metricWithAttribution.attribution = attribution;
+  // Use Object.assign to set property to keep tsc happy.
+  const metricWithAttribution = Object.assign(metric, {attribution});
   return metricWithAttribution;
 };
 

src/attribution/onFCP.ts

@@ -55,9 +55,8 @@ const attributeFCP = (metric: FCPMetric): FCPMetricWithAttribution => {
     }
   }
 
-  // Cast to attribution metric so it can be populated.
-  const metricWithAttribution = metric as FCPMetricWithAttribution;
-  metricWithAttribution.attribution = attribution;
+  // Use Object.assign to set property to keep tsc happy.
+  const metricWithAttribution = Object.assign(metric, {attribution});
   return metricWithAttribution;
 };
 

src/attribution/onFID.ts

@@ -34,9 +34,8 @@ const attributeFID = (metric: FIDMetric): FIDMetricWithAttribution => {
     loadState: getLoadState(fidEntry.startTime),
   };
 
-  // Cast to attribution metric so it can be populated.
-  const metricWithAttribution = metric as FIDMetricWithAttribution;
-  metricWithAttribution.attribution = attribution;
+  // Use Object.assign to set property to keep tsc happy.
+  const metricWithAttribution = Object.assign(metric, {attribution});
   return metricWithAttribution;
 };
 

src/attribution/onINP.ts

@@ -240,9 +240,8 @@ const attributeINP = (metric: INPMetric): INPMetricWithAttribution => {
     loadState: getLoadState(firstEntry.startTime),
   };
 
-  // Cast to attribution metric so it can be populated.
-  const metricWithAttribution = metric as INPMetricWithAttribution;
-  metricWithAttribution.attribution = attribution;
+  // Use Object.assign to set property to keep tsc happy.
+  const metricWithAttribution = Object.assign(metric, {attribution});
   return metricWithAttribution;
 };
 

src/attribution/onLCP.ts

@@ -85,9 +85,8 @@ const attributeLCP = (metric: LCPMetric): LCPMetricWithAttribution => {
     }
   }
 
-  // Cast to attribution metric so it can be populated.
-  const metricWithAttribution = metric as LCPMetricWithAttribution;
-  metricWithAttribution.attribution = attribution;
+  // Use Object.assign to set property to keep tsc happy.
+  const metricWithAttribution = Object.assign(metric, {attribution});
   return metricWithAttribution;
 };
 

src/attribution/onTTFB.ts

@@ -73,9 +73,8 @@ const attributeTTFB = (metric: TTFBMetric): TTFBMetricWithAttribution => {
     };
   }
 
-  // Cast to attribution metric so it can be populated.
-  const metricWithAttribution = metric as TTFBMetricWithAttribution;
-  metricWithAttribution.attribution = attribution;
+  // Use Object.assign to set property to keep tsc happy.
+  const metricWithAttribution = Object.assign(metric, {attribution});
   return metricWithAttribution;
 };