Merge pull request ihadeed#1 from hibeekaey/staging

Maintain backward compatibility

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+  "cSpell.words": [
+    "chooser",
+    "cordova",
+    "file",
+    "plugin"
+  ]
+}

README.md

@@ -1,31 +1,48 @@
-Cordova FileChooser Plugin
+# Cordova FileChooser Plugin
 
 Requires Cordova >= 2.8.0
 
-Install with Cordova CLI
-
-	$ cordova plugin add https://github.com/don/cordova-filechooser.git
+## Install with Cordova CLI
 
-Install with Plugman 
+```bash
+cordova plugin add https://github.com/don/cordova-filechooser.git
+```
 
-	$ plugman --platform android --project /path/to/project \ 
-		--plugin https://github.com/don/cordova-filechooser.git
+## Install with Plugman
 
-API
+```bash
+plugman --platform android --project /path/to/project \
+--plugin https://github.com/don/cordova-filechooser.git
+```
 
-	fileChooser.open(successCallback, failureCallback);
+## API
 
-The success callback get the uri of the selected file
+```javascript
+fileChooser.open(filter, successCallback, failureCallback); // with mime filter
 
-	fileChooser.open(function(uri) {
-		alert(uri);
-	});
-
-Screenshot
+fileChooser.open(successCallback. failureCallback); // without mime filter
+```
+
+### Filter (Optional)
+
+```javascript
+{ "mime": "application/pdf" }  // text/plain, image/png, image/jpeg, audio/wav etc
+```
+
+The success callback gets the uri of the selected file
+
+```javascript
+fileChooser.open(function(uri) {
+alert(uri);
+});
+```
+
+## Screenshot
 
 ![Screenshot](filechooser.png "Screenshot")
 
-Supported Platforms:
+## Supported Platforms
+
 - Android
 - Windows (UWP)
 

www/fileChooser.js

@@ -1,5 +1,11 @@
 module.exports = {
     open: function (filter, success, failure) {
+        if (typeof filter === 'function') {
+            failure = success;
+            success = filter;
+            filter = {};
+        }
+
         cordova.exec(success, failure, "FileChooser", "open", [ filter ]);
     }
 };