From 5ae468a3d30d9dd6f30d3d0d9913f421d4223e36 Mon Sep 17 00:00:00 2001
From: Faisal Salman <fyzlman@gmail.com>
Date: Sat, 1 Jul 2017 20:28:03 +0700
Subject: [PATCH] uastring is optional when using extensions

---
 readme.md        |  8 ++++----
 src/ua-parser.js |  5 +++++
 test/test.js     | 15 +++++++++++----
 3 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/readme.md b/readme.md
index 88edca8..98c6e58 100644
--- a/readme.md
+++ b/readme.md
@@ -253,16 +253,16 @@ $('body').addClass('ua-browser-' + $.ua.browser.name + ' ua-devicetype-' + $.ua.
 
 ## Extending regex patterns
 
-* `UAParser(uastring[, extensions])`
+* `UAParser([uastring,] extensions)`
 
 Pass your own regexes to extend the limited matching rules.
 
 ```js
 // Example:
-var uaString = 'Mozilla/5.0 MyOwnBrowser/1.3';
 var myOwnRegex = [[/(myownbrowser)\/([\w\.]+)/i], [UAParser.BROWSER.NAME, UAParser.BROWSER.VERSION]];
-var parser = new UAParser(uaString, { browser: myOwnRegex });
-console.log(parser.getBrowser());   // {name: "MyOwnBrowser", version: "1.3"}
+var myParser = new UAParser({ browser: myOwnRegex });
+var uaString = 'Mozilla/5.0 MyOwnBrowser/1.3';
+console.log(myParser.setUA(uaString).getBrowser());   // {name: "MyOwnBrowser", version: "1.3"}
 ```
 
 
diff --git a/src/ua-parser.js b/src/ua-parser.js
index c4ba8ad..2048a99 100644
--- a/src/ua-parser.js
+++ b/src/ua-parser.js
@@ -818,6 +818,11 @@
 
     var UAParser = function (uastring, extensions) {
 
+        if (typeof uastring === 'object') {
+            extensions = uastring;
+            uastring = undefined;
+        }
+
         if (!(this instanceof UAParser)) {
             return new UAParser(uastring, extensions).getResult();
         }
diff --git a/test/test.js b/test/test.js
index 40a6e0d..2fd033e 100644
--- a/test/test.js
+++ b/test/test.js
@@ -68,10 +68,17 @@ for (var i in methods) {
 describe('Extending Regex', function () {
     var uaString = 'Mozilla/5.0 MyOwnBrowser/1.3';
     var myOwnBrowser = [[/(myownbrowser)\/((\d+)?[\w\.]+)/i], [UAParser.BROWSER.NAME, UAParser.BROWSER.VERSION, UAParser.BROWSER.MAJOR]];
-    var parser = new UAParser(uaString, {browser: myOwnBrowser});
-    assert.equal(parser.getBrowser().name, 'MyOwnBrowser');
-    assert.equal(parser.getBrowser().version, '1.3');
-    assert.equal(parser.getBrowser().major, '1');
+
+    var parser1 = new UAParser(uaString, {browser: myOwnBrowser});
+    assert.equal(parser1.getBrowser().name, 'MyOwnBrowser');
+    assert.equal(parser1.getBrowser().version, '1.3');
+    assert.equal(parser1.getBrowser().major, '1');
+
+    var parser2 = new UAParser({browser: myOwnBrowser});
+    assert.equal(parser2.getBrowser().name, undefined);
+    parser2.setUA(uaString);
+    assert.equal(parser2.getBrowser().name, 'MyOwnBrowser');
+    assert.equal(parser1.getBrowser().version, '1.3');
 });
 
 describe('Using Require.js', function () {