Merge pull request #405 from mathjax/issue404

Better handling of undefined tag class. #404
mathjax · Jan 3, 2020 · 9197fd4 · 9197fd4
2 parents a0414c4 + c96017a
commit 9197fd4
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/ts/input/tex/Tags.ts b/ts/input/tex/Tags.ts
@@ -651,7 +651,10 @@ export namespace TagsFactory {
    * @return {Tags} The newly created object.
    */
   export let create = function(name: string): Tags {
-    let constr = tagsMapping.get(name) || this.defaultTags;
+    let constr = tagsMapping.get(name) || tagsMapping.get(defaultTags);
+    if (!constr) {
+        throw Error('Unknown tags class');
+    }
     return new constr();
   };