我有一个 angularjs 网页，想要获取指定元素的范围。但是执行reloadWithDebugInfo函数后，结果为null；
private Page _page;
private Browser _browser;
private async void button1_ClickAsync(object sender, EventArgs e)
{
try
{
await initAsync();
await test2Async();
}
catch (Exception ex)
{
MessageBox.Show("Error : " + ex.Message);
}
}
private async Task initAsync()
{
_browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
Headless = false,
ExecutablePath = @"c:\Program Files (x86)\Google\Chrome\Application\chrome.exe",
Timeout = 60000
});
}
private async Task test2Async()
{
try
{
_page = await _browser.NewPageAsync();
await _page.GoToAsync("https://SOME Angular JS WebPage");
await _page.EvaluateFunctionAsync(@"() => angular.reloadWithDebugInfo()");
var scopeContent = await _page.EvaluateFunctionAsync("() => angular.element(document.getElementsByClassName('left-column-v3')).scope() ");
// scopeContent is null. why? (the above javascript code runs successfully in the chrome dev console.)
}
catch (Exception ex)
{
MessageBox.Show("Error : " + ex.Message);
}
}
这些语句在 chrome 开发工具中运行良好。我期望范围的 json 内容，但那是空的；
更新：对不起，我在 Scope() 之后忘记了一些东西。我想要一个范围内的变量，而不是范围本身：
var scopeContent = await _page.EvaluateFunctionAsync("() => angular.element(document.getElementsByClassName('left-column-v3')).scope().SomeVariable ");
