Matches the state of a web page by various criteria.

class PageStateMatcher extends ChromeObject {
 PageStateMatcher({UrlFilter pageUrl, List<String> css}) {
   if (pageUrl != null) this.pageUrl = pageUrl;
   if (css != null) this.css = css;
 }
 PageStateMatcher.fromProxy(JsObject jsProxy): super.fromProxy(jsProxy);

 /**
  * Matches if the condition of the UrlFilter are fulfilled for the top-level
  * URL of the page.
  */
 UrlFilter get pageUrl => _createUrlFilter(jsProxy['pageUrl']);
 set pageUrl(UrlFilter value) => jsProxy['pageUrl'] = jsify(value);

 /**
  * Matches if all of the CSS selectors in the array match displayed elements
  * in a frame with the same origin as the page's main frame.  All selectors in
  * this array must be [compound
  * selectors](http://www.w3.org/TR/selectors4/#compound) to speed up matching.
  * Note that listing hundreds of CSS selectors or CSS selectors that match
  * hundreds of times per page can still slow down web sites.
  */
 List<String> get css => listify(jsProxy['css']);
 set css(List<String> value) => jsProxy['css'] = jsify(value);
}