[javascript mode] Drop expected tokens when running into ), }, or ]

Issue codemirror#5431

Author: marijnh

mode/javascript/javascript.js

@@ -344,7 +344,7 @@ CodeMirror.defineMode("javascript", function(config, parserConfig) {
   function expect(wanted) {
     function exp(type) {
       if (type == wanted) return cont();
-      else if (wanted == ";") return pass();
+      else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
       else return cont(exp);
     };
     return exp;