update issue guide

.github/ISSUE_TEMPLATE.md

@@ -1,11 +1,3 @@
-<!--
-IMPORTANT: Please use the following link to create a new issue:
-
-  https://www.iviewui.com/new-issue
-
-If your issue was not created using the app above, it will be closed immediately.
--->
-
 <!--
 注意：请使用下面的链接来新建 issue：
 
@@ -13,3 +5,10 @@ If your issue was not created using the app above, it will be closed immediately
 
 不是用上面的链接创建的 issue 会被立即关闭。
 -->
+<!--
+IMPORTANT: Please use the following link to create a new issue:
+
+  https://www.iviewui.com/new-issue
+
+If your issue was not created using the app above, it will be closed immediately.
+-->

examples/routers/cascader.vue

@@ -1,17 +1,27 @@
 <template>
-    <div style="width: 200px;margin: 100px;">
-        <Cascader :data="data" v-model="value1" trigger="hover"></Cascader>
-    </div>
+    <Cascader v-model="value3" :data="data" filterable @on-change="hc"></Cascader>
 </template>
 <script>
     export default {
         data () {
             return {
-                value1: [],
                 data: [{
                     value: 'beijing',
                     label: '北京',
-                    children: []
+                    children: [
+                        {
+                            value: 'gugong',
+                            label: '故宫'
+                        },
+                        {
+                            value: 'tiantan',
+                            label: '天坛'
+                        },
+                        {
+                            value: 'wangfujing',
+                            label: '王府井'
+                        }
+                    ]
                 }, {
                     value: 'jiangsu',
                     label: '江苏',
@@ -41,7 +51,13 @@
                             ]
                         }
                     ],
-                }]
+                }],
+                value3: []
+            }
+        },
+        methods: {
+            hc (a,b) {
+                console.log(a,b)
             }
         }
     }