初始化（包含登录模块）

wxcomponents/vant/mixins/button.js

@@ -0,0 +1,18 @@
+export const button = Behavior({
+    externalClasses: ['hover-class'],
+    properties: {
+        id: String,
+        lang: {
+            type: String,
+            value: 'en'
+        },
+        businessId: Number,
+        sessionFrom: String,
+        sendMessageTitle: String,
+        sendMessagePath: String,
+        sendMessageImg: String,
+        showMessageCard: Boolean,
+        appParameter: String,
+        ariaLabel: String
+    }
+});