prevent dispatch form event

when component import an Input, prevent dispatch event from Input to
Form

examples/routers/message.vue

@@ -1,20 +1,22 @@
 <template>
-    <i-button @click.native="time">显示一个10秒的提示</i-button>
+    <div>
+        <i-button @click.native="success">显示成功提示</i-button>
+        <i-button @click.native="warning">显示警告提示</i-button>
+        <i-button @click.native="error">显示错误提示</i-button>
+    </div>
 </template>
 <script>
     export default {
         methods: {
-            time () {
-                this.$Message.info('我将在10秒后消失', 3, () => {
-                    console.log(1111)
-                });
+            success () {
+                this.$Message.success('这是一条成功的提示');
+            },
+            warning () {
+                this.$Message.warning('这是一条警告的提示');
+            },
+            error () {
+                this.$Message.error('对方不想说话，并且向你抛出了一个异常');
             }
-        },
-        mounted () {
-            this.$Message.config({
-                top: 50,
-                duration: 3
-            });
         }
     }
 </script>