Core: Don't thow an error if lookbehing is used without anything matc…

…hing.
PrismJS · Mar 3, 2018 · e0cd47f · e0cd47f
1 parent bdbdb7d
commit e0cd47f
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Showing 3 changed files with 3 additions and 3 deletions.
diff --git a/components/prism-core.js b/components/prism-core.js
@@ -356,7 +356,7 @@ var _ = _self.Prism = {
 					}
 
 					if(lookbehind) {
-						lookbehindLength = match[1].length;
+						lookbehindLength = match[1] ? match[1].length : 0;
 					}
 
 					var from = match.index + lookbehindLength,

diff --git a/components/prism-core.min.js b/components/prism-core.min.js
diff --git a/prism.js b/prism.js
@@ -361,7 +361,7 @@ var _ = _self.Prism = {
 					}
 
 					if(lookbehind) {
-						lookbehindLength = match[1].length;
+						lookbehindLength = match[1] ? match[1].length : 0;
 					}
 
 					var from = match.index + lookbehindLength,