diff --git a/README.md b/README.md
index b00b66f0..2311941e 100644
--- a/README.md
+++ b/README.md
@@ -76,14 +76,8 @@ Normal browsers and Internet Explorer 9+.
 
 ## Links
 
+- [TalkingData](https://github.com/TalkingData)
 - [Vue](https://github.com/vuejs/vue)
 - [Webpack](https://github.com/webpack/webpack)
 - [ionicons](https://github.com/driftyco/ionicons)
 - [Ant Design](https://github.com/ant-design/ant-design)
-
-## Donation
-iView is an MIT licensed open source project and completely free to use, but if it is helpful to you, you can buy me a coffee :)
-
-<p align="center">
-    <img src="https://raw.githubusercontent.com/iview/iview/master/assets/pay.png">
-</p>
diff --git a/src/components/modal/modal.vue b/src/components/modal/modal.vue
index 0ace4915..51a529b1 100644
--- a/src/components/modal/modal.vue
+++ b/src/components/modal/modal.vue
@@ -132,7 +132,8 @@
             },
             handleWrapClick (event) {
                 // use indexOf,do not use === ,because ivu-modal-wrap can have other custom className
-                if (event.target.getAttribute('class').indexOf(`${prefixCls}-wrap`) > -1) this.mask();
+                const className = event.target.getAttribute('class');
+                if (className && className.indexOf(`${prefixCls}-wrap`) > -1) this.mask();
             },
             cancel () {
                 this.close();