dart 函数练习

概述import ‘dart:convert‘;import ‘dart:html‘;void main() {_getIPAddress() { final url = ‘https://httpbin.org/ip‘; HttpRequest.request(url).then((value) { print(json.decode(val

import ‘dart:convert‘;import ‘dart:HTML‘;voID main() {_getIPAddress() {  final url = ‘https://httpbin.org/ip‘;  httpRequest.request(url).then((value) {      print(Json.decode(value.responseText)[‘origin‘]);  }).catchError((error) => print(error));}  _getIPAddress();}

114.92.6.153,114.92.6.153

 async

import ‘dart:convert‘;import ‘dart:HTML‘;voID main() {_getIPAddress() async {  final url = ‘https://httpbin.org/ip‘;  var request = await httpRequest.request(url);  String ip = Json.decode(request.responseText)[‘origin‘];  print(ip);}  _getIPAddress();}

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