Add more validations

Philipp Alferov · Philipp Alferov · commit 45e18f7cfa08 · 2015-08-26T11:22:49.000-04:00
diff --git a/docs/dist/examples.js b/docs/dist/examples.js
@@ -28908,15 +28908,29 @@ function isString (obj) {
   return typeof obj === 'string' || obj instanceof String;
 }
 
-function isBlobInstance (obj) {
-  return obj instanceof Blob;
+function isUndefined (obj) {
+  return typeof obj == "undefined";
 }
 
 angular
   .module('fileSaver', [])
-  .factory('SaveAs', SaveAs);
+  .factory('SaveAs', ['$window', SaveAs]);
 
-  function SaveAs() {
+  function SaveAs ($window) {
+    var saveAs = $window.saveAs;
+    var Blob = $window.Blob;
+
+    if (isUndefined(saveAs)) {
+      handleErrors('saveAs is not supported. Please include saveAs polyfill');
+    }
+
+    if (isUndefined(Blob)) {
+      handleErrors('Blob is not supported. Please include blob polyfill');
+    }
+
+    function isBlobInstance (obj) {
+      return obj instanceof Blob;
+    }
 
     function save(blob, filename) {
       try {
diff --git a/docs/index.html b/docs/index.html
@@ -9,7 +9,7 @@
   <link href='http://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
 
   <link rel="stylesheet" type="text/css" href="dist/examples.css" media="screen">
-  <script src="dist/examples.min.js"></script>
+  <script src="dist/examples.js"></script>
 </head>
 
 <body ng-app="ngFileSaver">
diff --git a/src/angular-file-saver.js b/src/angular-file-saver.js
@@ -26,15 +26,29 @@ function isString (obj) {
   return typeof obj === 'string' || obj instanceof String;
 }
 
-function isBlobInstance (obj) {
-  return obj instanceof Blob;
+function isUndefined (obj) {
+  return typeof obj == "undefined";
 }
 
 angular
   .module('fileSaver', [])
-  .factory('SaveAs', SaveAs);
+  .factory('SaveAs', ['$window', SaveAs]);
 
-  function SaveAs() {
+  function SaveAs ($window) {
+    var saveAs = $window.saveAs;
+    var Blob = $window.Blob;
+
+    if (isUndefined(saveAs)) {
+      handleErrors('saveAs is not supported. Please include saveAs polyfill');
+    }
+
+    if (isUndefined(Blob)) {
+      handleErrors('Blob is not supported. Please include blob polyfill');
+    }
+
+    function isBlobInstance (obj) {
+      return obj instanceof Blob;
+    }
 
     function save(blob, filename) {
       try {
