fixes #7548 - Scroll bar because auto height adjustment doesn't take <0.5 values into account (#7549)

Co-authored-by: Peer Richelsen <peeroke@gmail.com>
Co-authored-by: Hariom Balhara <hariombalhara@gmail.com>

packages/embeds/embed-core/src/embed-iframe.ts

@@ -341,15 +341,16 @@ function keepParentInformedAboutDimensionChanges() {
     }
 
     const mainElementStyles = getComputedStyle(mainElement);
-    const contentHeight =
-      mainElement.offsetHeight +
-      parseInt(mainElementStyles.marginTop) +
-      parseInt(mainElementStyles.marginBottom);
-    const contentWidth =
-      mainElement.offsetWidth +
-      parseInt(mainElementStyles.marginLeft) +
-      parseInt(mainElementStyles.marginRight);
-
+    // Use, .height as that gives more accurate value in floating point. Also, do a ceil on the total sum so that whatever happens there is enough iframe size to avoid scroll.
+    const contentHeight = Math.ceil(
+      parseFloat(mainElementStyles.height) +
+      parseFloat(mainElementStyles.marginTop) +
+      parseFloat(mainElementStyles.marginBottom));
+    const contentWidth = Math.ceil(
+      parseFloat(mainElementStyles.width) +
+      parseFloat(mainElementStyles.marginLeft) +
+      parseFloat(mainElementStyles.marginRight));
+    
     // During first render let iframe tell parent that how much is the expected height to avoid scroll.
     // Parent would set the same value as the height of iframe which would prevent scroll.
     // On subsequent renders, consider html height as the height of the iframe. If we don't do this, then if iframe get's bigger in height, it would never shrink