Test value against DOMException

index.js

@@ -6,17 +6,18 @@
 module.exports = isError;
 
 /**
- * Test whether `V` is error object.
+ * Test whether `value` is error object.
  *
- * @param {*} V
+ * @param {*} value
  * @returns {boolean}
  */
 
-function isError(V) {
-  var tagName = Object.prototype.toString.call(V);
+function isError(value) {
+  var tag = Object.prototype.toString.call(value);
   return (
-    tagName === '[object Error]' ||
-    tagName === '[object Exception]' ||
-    V instanceof Error
+    tag === '[object Error]' ||
+    tag === '[object Exception]' ||
+    tag === '[object DOMException]' ||
+    value instanceof Error
   );
 }

test.js

@@ -1,9 +1,8 @@
 var test = require('tape');
 var isError = require('.');
 
-test('isError(V)', function (t) {
+test('isError(value)', function (t) {
   t.ok(new Error('Error'));
   t.ok(new RangeError('Error'));
-  t.notOk(isError({}));
   t.end();
 });