qrcode 改为cdn

lib/utils.js

@@ -39,8 +39,14 @@ export function loadExternalResource(url, type) {
       tag.src = url
     }
     if (tag) {
-      tag.onload = () => resolve(url)
-      tag.onerror = () => reject(url)
+      tag.onload = () => {
+        console.log(url, '加载成功')
+        resolve(url)
+      }
+      tag.onerror = () => {
+        console.log(url, '加载失败')
+        reject(url)
+      }
       document.head.appendChild(tag)
     }
   })