Centralise the checks for blob and form data support

ALF-er · Jan 24, 2015 · 0ca546c · 0ca546c
1 parent dac8035
commit 0ca546c
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/fetch.js b/fetch.js
@@ -100,6 +100,7 @@
       return false
     }
   })();
+  var formDataSupport = 'FormData' in self;
 
   function Body() {
     this.bodyUsed = false
@@ -109,9 +110,9 @@
         this._bodyInit = body
         if (typeof body === 'string') {
           this._bodyText = body
-        } else if ('Blob' in self && Blob.prototype.isPrototypeOf(body)) {
+        } else if (blobSupport && Blob.prototype.isPrototypeOf(body)) {
           this._bodyBlob = body
-        } else if ('FormData' in self && FormData.prototype.isPrototypeOf(body)) {
+        } else if (formDataSupport && FormData.prototype.isPrototypeOf(body)) {
           this._bodyFormData = body
         } else if (!body) {
           this._bodyText = ''
@@ -158,7 +159,7 @@
         this._bodyInit = body
         if (typeof body === 'string') {
           this._bodyText = body
-        } else if ('FormData' in self && FormData.prototype.isPrototypeOf(body)) {
+        } else if (formDataSupport && FormData.prototype.isPrototypeOf(body)) {
           this._bodyFormData = body
         } else if (!body) {
           this._bodyText = ''
@@ -173,7 +174,7 @@
       }
     }
 
-    if ('FormData' in self) {
+    if (formDataSupport) {
       this.formData = function() {
         return this.text().then(decode)
       }