fix: 修复 iframe postMessage 可能会报 could not be cloned 错问题 (#3919)

* fix: 修复 iframe posemessage 可能会报 could not be cloned 错问题

* 修复 iframe 链接错误

docs/zh-CN/components/iframe.md

@@ -15,7 +15,7 @@ order: 51
 ```schema: scope="body"
 {
     "type": "iframe",
-    "src": "https://gitee.com/baidu/amis",
+    "src": "https://github.com/baidu/amis",
     "height": 300
 }
 ```
@@ -28,11 +28,11 @@ order: 51
 {
   "type": "page",
   "data": {
-    "iframeSrc": "baidu/amis"
+    "iframeSrc": "https://github.com/baidu/amis"
   },
   "body": {
     "type": "iframe",
-    "src": "https://gitee.com/${iframeSrc}",
+    "src": "${iframeSrc}",
     "height": 300
   }
 }

src/renderers/IFrame.tsx

@@ -137,7 +137,7 @@ export default class IFrame extends React.Component<IFrameProps, object> {
     (this.IFrameRef.current as HTMLIFrameElement)?.contentWindow?.postMessage(
       {
         type: `amis:${type}`,
-        data
+        data: JSON.parse(JSON.stringify(data))
       },
       '*'
     );