Verify value is defined before trying to run a min/max length value.

this will help avoid a TypeError.

Author: liorcode

dist/angular-validation-rule.js

@@ -10,10 +10,10 @@
         email: /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/,
         number: /^\d+$/,
         minlength: function(value, scope, element, attrs, param) {
-          return value.length >= param;
+          return value && value.length >= param;
         },
         maxlength: function(value, scope, element, attrs, param) {
-          return value.length <= param;
+          return !value || value.length <= param;
         }
       };
 

dist/angular-validation-rule.min.js

@@ -10,10 +10,10 @@
         email: /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/,
         number: /^\d+$/,
         minlength: function(value, scope, element, attrs, param) {
-          return value.length >= param;
+          return value && value.length >= param;
         },
         maxlength: function(value, scope, element, attrs, param) {
-          return value.length <= param;
+          return !value || value.length <= param;
         }
       };