public int IndexOf(JsValue valueToFind, int?startIndex = null)
{
var args = new List <JsValue>
{
valueToFind
};
if (startIndex.HasValue == true)
{
args.Add(ValueFactory.CreateNumber(startIndex.Value));
}
var fn = GetProperty <JsFunction>("indexOf");
var result = fn.Call <JsNumber>(this, args.ToArray());
return(result.ToInt32());
}
public JsNumber CreateNumber(int number)
{
return(ValueFactory.CreateNumber(number));
}