fix(lib): update scripts/aem.js to [email protected]

Test URL: https://update-lib-aem-patch-2-7-1--aem-boilerplate--adobe.hlx.live/
Release Notes: https://github.com/adobe/aem-lib/releases/tag/v2.7.1

scripts/aem.js

@@ -18,12 +18,13 @@ function sampleRUM(checkpoint, data) {
     window.hlx = window.hlx || {};
     sampleRUM.enhance = () => {};
     if (!window.hlx.rum) {
+      const param = new URLSearchParams(window.location.search).get('rum');
       const weight = (window.SAMPLE_PAGEVIEWS_AT_RATE === 'high' && 10)
         || (window.SAMPLE_PAGEVIEWS_AT_RATE === 'low' && 1000)
-        || (new URLSearchParams(window.location.search).get('rum') === 'on' && 1)
+        || (param === 'on' && 1)
         || 100;
       const id = Math.random().toString(36).slice(-4);
-      const isSelected = Math.random() * weight < 1;
+      const isSelected = param !== 'off' && Math.random() * weight < 1;
       // eslint-disable-next-line object-curly-newline, max-len
       window.hlx.rum = {
         weight,
@@ -80,7 +81,13 @@ function sampleRUM(checkpoint, data) {
             t: time,
             ...pingData,
           });
-          const { href: url, origin } = new URL(`.rum/${weight}`, sampleRUM.collectBaseURL);
+          const urlParams = window.RUM_PARAMS
+            ? `?${new URLSearchParams(window.RUM_PARAMS).toString()}`
+            : '';
+          const { href: url, origin } = new URL(
+            `.rum/${weight}${urlParams}`,
+            sampleRUM.collectBaseURL,
+          );
           const body = origin === window.location.origin
             ? new Blob([rumData], { type: 'application/json' })
             : rumData;
@@ -91,6 +98,9 @@ function sampleRUM(checkpoint, data) {
         sampleRUM.sendPing('top', timeShift());
 
         sampleRUM.enhance = () => {
+          // only enhance once
+          if (document.querySelector('script[src*="rum-enhancer"]')) return;
+
           const script = document.createElement('script');
           script.src = new URL(
             '.rum/@adobe/helix-rum-enhancer@^2/src/index.js',
@@ -108,7 +118,7 @@ function sampleRUM(checkpoint, data) {
     }
     document.dispatchEvent(new CustomEvent('rum', { detail: { checkpoint, data } }));
   } catch (error) {
-    // something went wrong
+    // something went awry
   }
 }
 
@@ -684,6 +694,9 @@ async function loadSections(element) {
   for (let i = 0; i < sections.length; i += 1) {
     // eslint-disable-next-line no-await-in-loop
     await loadSection(sections[i]);
+    if (i === 0 && sampleRUM.enhance) {
+      sampleRUM.enhance();
+    }
   }
 }