Core: Prevent error from throwing when element does not have a parentNode in highlightElement. Fix #1203

Author: Golmote

components/prism-core.js

@@ -184,11 +184,13 @@ var _ = _self.Prism = {
 		// Set language on the element, if not present
 		element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
 
-		// Set language on the parent, for styling
-		parent = element.parentNode;
+		if (element.parentNode) {
+			// Set language on the parent, for styling
+			parent = element.parentNode;
 
-		if (/pre/i.test(parent.nodeName)) {
-			parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
+			if (/pre/i.test(parent.nodeName)) {
+				parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
+			}
 		}
 
 		var code = element.textContent;

components/prism-core.min.js

@@ -189,11 +189,13 @@ var _ = _self.Prism = {
 		// Set language on the element, if not present
 		element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
 
-		// Set language on the parent, for styling
-		parent = element.parentNode;
+		if (element.parentNode) {
+			// Set language on the parent, for styling
+			parent = element.parentNode;
 
-		if (/pre/i.test(parent.nodeName)) {
-			parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
+			if (/pre/i.test(parent.nodeName)) {
+				parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
+			}
 		}
 
 		var code = element.textContent;