初学flutter，初学前端，尝试在dart中直接使用HttpClient时，直接报出Platform not supported，查资料发现他还不支持浏览器。 通过查阅资料发现可以借助axios 与 dart:js 之间的互相调用来实现。目前还不清楚有没有其它更好的方式。实例代码：

main.dart:

import 'package:flutter/material.dart';
import 'dart:js';

void callJS(){
context['console'].callMethod('log', ['开始调用']);
JsObject(context['getDartCall'], ['http://*****.com','{ID: 1234 , Name: "Hunter"}']);
}

void jsCallBack(resData){
//结果回调
print(resData);
}

void main() {
//定义回调方法
context['jsCallBack'] = jsCallBack;
runApp(new MyApp());
}

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
home: new MyHomePage(),
);
}
}

class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);

@override
_MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State {

@override
Widget build(BuildContext context) {
var spacer = new SizedBox(height: 32.0);

return new Scaffold(  
  body: new Center(  
    child: new Column(  
      mainAxisAlignment: MainAxisAlignment.center,  
      children: <Widget>\[  
        new Text('Dart 与 JS 互相调用实例'),  
        new Text('发起调用'),  
        spacer,  
        new RaisedButton(  
          onPressed: (){  
            callJS();  
          },  
          child: new Text('发起调用'),  
        ),  
      \],  
    ),  
  ),  
);  

}
}

在web下的index.html里面需要引入对应的js