下面的代码“看起来正确”,它编译,但不运行,失败的控制台消息：
@H_502_3@Cannot load Dart script dart:io@H_502_3@如果我注释掉#import(‘dart：io’);我错了,我得到一个编译错误,但它启动,直到我按下按钮,我是否收到运行时错误：
Failed to load resource
@H_502_3@Internal error: ‘http://127.0.0.1:3030/home/david/dart/samples/htmlIO/htmlIO.dart’: Error: line 13 pos 26: type ‘HttpClient’ is not loaded@H_502_3@……这是预期的. @H_502_3@所以我的问题是：如何导入dart：html&飞镖：io在同一个班级？
var connection = new HttpClient().get(‘www.google.com’,80,‘/’);
#import('dart:html');
#import('dart:io');
class htmlIO {
ButtonElement _aButton;
htmlIO() {
}
void handlePress(Event e) {
var connection = new HttpClient().get('www.google.com','/');
write('made it');
}
void run() {
_aButton = document.query("#aButton");
_aButton.on.click.add(handlePress);
write("Hello World!");
}
void write(String message) {
// the HTML library defines a global "document" variable
document.query('#status').innerHTML = message;
}
}
void main() {
new htmlIO().run();
}
