diff --git a/app.js b/app.js
index 3709681..ec13deb 100644
--- a/app.js
+++ b/app.js
@@ -1,6 +1,8 @@
+const jsonApi = require('utils/jsonapi-datastore/dist/jsonapi-datastore.js')
+require('utils/polyfill.js')
+
 App({
   onLaunch: function () {
-    const jsonApi = require('utils/jsonapi-datastore/dist/jsonapi-datastore.js')
     this.store = new(jsonApi.JsonApiDataStore)
     this.jsonModel = jsonApi.JsonApiDataStoreModel
     this.globalData.code = wx.getStorageSync('code')
diff --git a/pages/mine/mine.wxml b/pages/mine/mine.wxml
index 0c58ee7..daa546b 100644
--- a/pages/mine/mine.wxml
+++ b/pages/mine/mine.wxml
@@ -6,7 +6,7 @@
   <view wx:if="{{baye_rank}}">
     <view class='xunzhang'>
       <image src="{{xunZhang}}" mode="aspectFit"></image>
-      <view class="rank"><text>{{baye_rank || ''}}</text></view>
+      <view class="rank"><text>{{baye_rank ? baye_rank : ''}}</text></view>
     </view>
   </view>
 </view>
@@ -56,4 +56,4 @@
       <view>》</view>
     </view>-->
   </view>
-</view>
\ No newline at end of file
+</view>
diff --git a/pages/show_product/show_product.wxml b/pages/show_product/show_product.wxml
index 37c56f6..1ab2bca 100644
--- a/pages/show_product/show_product.wxml
+++ b/pages/show_product/show_product.wxml
@@ -9,7 +9,7 @@
     <form>
       <view class="line">
         <view class="section price">
-          <text id="price">¥{{product.price || '无法获取价格'}}</text>
+          <text id="price">¥{{product.price}}</text>
         </view>
         <view class="section quantity">
           <view>购买数量：</view>
diff --git a/utils/polyfill.js b/utils/polyfill.js
new file mode 100644
index 0000000..4a70701
--- /dev/null
+++ b/utils/polyfill.js
@@ -0,0 +1,54 @@
+if (!Array.prototype.findIndex) {
+  Object.defineProperty(Array.prototype, 'findIndex', {
+    value: function(predicate) {
+      'use strict';
+      if (this == null) {
+        throw new TypeError('Array.prototype.findIndex called on null or undefined');
+      }
+      if (typeof predicate !== 'function') {
+        throw new TypeError('predicate must be a function');
+      }
+      var list = Object(this);
+      var length = list.length >>> 0;
+      var thisArg = arguments[1];
+      var value;
+
+      for (var i = 0; i < length; i++) {
+        value = list[i];
+        if (predicate.call(thisArg, value, i, list)) {
+          return i;
+        }
+      }
+      return -1;
+    },
+    enumerable: false,
+    configurable: false,
+    writable: false
+  });
+}
+
+if (!Array.prototype.find) {
+  Object.defineProperty(Array.prototype, 'find', {
+    value: function(predicate) {
+     'use strict';
+     if (this == null) {
+       throw new TypeError('Array.prototype.find called on null or undefined');
+     }
+     if (typeof predicate !== 'function') {
+       throw new TypeError('predicate must be a function');
+     }
+     var list = Object(this);
+     var length = list.length >>> 0;
+     var thisArg = arguments[1];
+     var value;
+
+     for (var i = 0; i < length; i++) {
+       value = list[i];
+       if (predicate.call(thisArg, value, i, list)) {
+         return value;
+       }
+     }
+     return undefined;
+    }
+  });
+}