When your FVTerm web application is being hosted in a web page that is not hosted on the same server as FVTerm, without use of web messaging, interaction between the hosting page and the iframe require that the document.domain setting be used. As stated in the developer.mozilla.org website,
"Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards..."
While there are work-arounds involving some custom HTTP headers by both the hosting web server and the FVTerm server, if you have a hosting page on a different server than FVTerm, we recommend either starting with the FVTermMsgApi.js module, or if already using FVTermParent.js, transitioning to FVTermMsgApi.js.
