$eval<T> method
This method runs document.querySelector
within the page and passes it as
the first argument to pageFunction
. If there's no element matching
selector
, the method throws an error.
If pageFunction
returns a Promise
, then page.$eval
would wait for
the promise to resolve and return its value.
Examples:
var searchValue =
await page.$eval('#search', 'function (el) { return el.value; }');
var preloadHref = await page.$eval(
'link[rel=preload]', 'function (el) { return el.href; }');
var html = await page.$eval(
'.main-container', 'function (e) { return e.outerHTML; }');
Shortcut for Page.mainFrame.$eval(selector, pageFunction)
.
Implementation
Future<T?> $eval<T>(String selector, @Language('js') String pageFunction,
{List<dynamic>? args}) {
return mainFrame.$eval<T>(selector, pageFunction, args: args);
}