Check if tokens exists and return

If the language was autoloaded, the grammar may not exist yet. We need to check if it exists before we attempt to modify it.
PrismJS · Sep 27, 2017 · f6f3ab5 · f6f3ab5
1 parent e76cd72
commit f6f3ab5
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/plugins/show-invisibles/prism-show-invisibles.js b/plugins/show-invisibles/prism-show-invisibles.js
@@ -10,6 +10,8 @@ if (
 Prism.hooks.add('before-highlight', function(env) {
 	var tokens = env.grammar;
 
+	if (!tokens) return;
+
 	tokens.tab = /\t/g;
 	tokens.crlf = /\r\n/g;
 	tokens.lf = /\n/g;