supportsProgressEvent property
Checks to see if the Progress event is supported on the current platform.
Implementation
static bool get supportsProgressEvent {
var xhr = new HttpRequest();
return JS('bool', '("onprogress" in #)', xhr);
}Checks to see if the Progress event is supported on the current platform.
static bool get supportsProgressEvent {
var xhr = new HttpRequest();
return JS('bool', '("onprogress" in #)', xhr);
}