fix var scope error and diplay some html when result is success

assets/javascripts/discourse/components/stripe-card.js.es6

@@ -1,6 +1,7 @@
 import { ajax } from 'discourse/lib/ajax';
 
 export default Ember.Component.extend({
+  result: null,
   stripe: Stripe('pk_test_b8RmhzlL8QPizJRqOrKF3JEV'),
 
   card: function() {
@@ -9,25 +10,31 @@ export default Ember.Component.extend({
   }.property('stripe'),
 
   didInsertElement() {
+    this._super();
     this.get('card').mount('#card-element');
   },
 
   actions: {
     submitStripeCard() {
+      var self = this;
+
       this.get('stripe').createToken(this.get('card')).then(function(result) {
+
+        self.set('result', null);
+
         if (result.error) {
           console.log('error yo');
         }
         else {
-          var data = {
+          var params = {
             stripeToken: result.token.id,
             amount: 1234
           };
 
-          ajax('/charges', { data: data, method: 'post' }).then(data => {
-            console.log(data);
-          }).catch(() => {
-            console.log('error');
+          ajax('/charges', { data: params, method: 'post' }).then(data => {
+            self.set('result', (data.status == 'succeeded' ? true : null));
+          }).catch((data) => {
+            console.log('catch', data);
           });
         }
       });

assets/javascripts/discourse/templates/components/stripe-card.hbs

@@ -5,4 +5,8 @@
   </div>
 
   <button {{action "submitStripeCard"}}>Submit Payment</button>
+
+  {{#if result}}
+    <div class="stripe-card-result">payment happened</div>
+  {{/if}}
 </form>