onConfirmAsync method
Implementation
JSPromise onConfirmAsync(String data) {
return JSPromise(((JSFunction resolve, JSFunction reject) {
if(this._callbackAsyncConfirm != null) {
this._callbackAsyncConfirm!(data).then((bool result) {
resolve.callAsFunction(null, result.toJS);
}).catchError((error) {
reject.callAsFunction(null, error.toString().toJS);
});
} else {
resolve.callAsFunction(null, false.toJS);
}
}).toJS);
}