fix: Implement flood control with 1024 max events

modules/index.js

@@ -34,6 +34,8 @@ const blocksMO = window.MutationObserver ? new MutationObserver(blocksMCB)
 // eslint-disable-next-line no-use-before-define, max-len
 const mediaMO = window.MutationObserver ? new MutationObserver(mediaMCB)
   /* c8 ignore next */ : {};
+// Collecting at least 10 clicks to identify blind clicks efficiently
+const MAX_CLICKS_PER_SELECTOR = 10;
 
 function trackCheckpoint(checkpoint, data, t) {
   const { weight, id } = window.hlx.rum;
@@ -301,17 +303,19 @@ function mediaMCB(mutations) {
 }
 
 function addTrackingFromConfig() {
-  let lastSource;
-  let lastTarget;
+  const clickCounts = new Map();
+
   document.addEventListener('click', (event) => {
     const source = sourceSelector(event.target);
     const target = targetSelector(event.target);
-    if (source !== lastSource || target !== lastTarget) {
+    const key = `${source}|${target}`;
+    const count = (clickCounts.get(key) || 0) + 1;
+    if (count <= MAX_CLICKS_PER_SELECTOR) {
       sampleRUM('click', { target, source });
-      lastSource = source;
-      lastTarget = target;
+      clickCounts.set(key, count);
     }
   });
+
   addCWVTracking();
   addFormTracking(window.document.body);
   addNavigationTracking();

test/it/click.test.html

@@ -80,13 +80,15 @@
           assert(window.called.length === 3 , 'checkpoint for click on link missing');
           assert(window.called[2].source === 'a#alink', 'invalid target for alink checkpoint');
 
-          a.click();
+           // Test multiple clicks on link
+          for (let i = 0; i < 11; i++) {
+            a.click();
+            await new Promise((resolve) => setTimeout(resolve, 10));
+          }
 
-          await new Promise((resolve) => {
-            setTimeout(resolve, 100);
-          });
+          console.log(`window.called: ${window.called.length}`);
 
-          assert(window.called.length === 3 , '2 consecutive clicks on link should not trigger new checkpoint');
+          assert(window.called.length === 12 , '11th consecutive clicks on link should not trigger new checkpoint');
 
           const late = document.createElement('a');
           late.id = 'alatelink';
@@ -99,8 +101,8 @@
             setTimeout(resolve, 100);
           });
 
-          assert(window.called.length === 4 , 'checkpoint for click on late added link missing');
-          assert(window.called[3].source === 'a#alatelink', 'invalid target for alatelink checkpoint');
+          assert(window.called.length === 13 , 'checkpoint for click on late added link missing');
+          assert(window.called[12].source === 'a#alatelink', 'invalid target for alatelink checkpoint');
         });
       });
     });