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 · e62ebca · e62ebca
1 parent e76cd72
commit e62ebca
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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;

diff --git a/plugins/show-invisibles/prism-show-invisibles.min.js b/plugins/show-invisibles/prism-show-invisibles.min.js