Check if tokens exists and return (#1195)

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 · Oct 10, 2017 · ed8bdb5 · ed8bdb5
1 parent e76cd72
commit ed8bdb5
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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