EO.WebEngine (used by both EO.WebBrowser and EO.Pdf) defines a global variable "eoapi". This variable is available in every page as a native browser object. You can use this object to perform the following tasks:

Checking Whether Inside EO.WebEngine

Because variable eoapi only exists when the page is running inside EO.WebEngine, you can check whether the page is running inside EO.WebEngine by checking whether variable eoapi exists. If variable eoapi exists, then the page is running inside EO.WebEngine. If variable eoapi does not exist, then the page is being rendered by a regular Web browser.

The following code demonstrates how to check whether eoapi exists:

//Check whether the page is running inside EO.WebEngine
if (typeof(eoapi) == "object")
{
    //Variable eoapi exists. So we are inside EO.WebEngine
    .....
}
else
{
    //Variable eoapi does not exist. So we are inside a
    //regular Web browser
}

Checking EO.WebEngine Version

Call getVersion on eoapi to return EO.WebEngine converter version number as a string (for example, "16.0.15.0"). The following JavaScript code outputs EO.WebEngine version number:

//Output EO.WebEngine version number
if (typeof(eoapi) == "object")
    document.write("EO.WebEngine version number: " + eoapi.getVersion());

Triggering Conversion Manually

Please see here for more details on triggering HTML to PDF conversion manually.

Calling .NET Code

Please see here for more details on triggering calling .NET code from JavaScript.