Merge pull request #2564 from w3c/fix/aria-levels

Fix aria-level values in caution boxes
w3c · Aug 9, 2023 · 8054e0f · 8054e0f
2 parents b584769 + 830c70b
commit 8054e0f
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/epub33/common/js/add-caution-hd.js b/epub33/common/js/add-caution-hd.js
@@ -11,9 +11,13 @@ function addCautionHeaders() {
 		var parent_hd = parent_section.querySelector('h2,h3,h4,h5,h6');
 		var parent_num = parent_hd.localName.replace('h','');
 
+		var aria_level = Number(parent_num) + 1;
+
+		if (aria_level > 6) { aria_level = 6; }
+
 		var caution_hd = document.createElement('div');
 			caution_hd.setAttribute('role', 'heading');
-			caution_hd.setAttribute('aria-level', parent_num+1);
+			caution_hd.setAttribute('aria-level', aria_level);
 			caution_hd.setAttribute('class','caution-title marker');
 
 		var caution_label = document.createElement('span');