postMessage to UI does not work and only sends undefined Working on a document traversing plugin, I was required to build up a progress indicator in the UI. Basically traversing all pages all componentSets all componentsin this order.I had communication working between code and ui, but from one day to another, this changed. Now I can get only message from UI to code, but not back. Code is sending, no matter what I am handing it for sending, “undefined” .. On UI side, this is awaiting the messages:window.addEventListener("message", (event) => { console.log("Received " + event.data.postMessage) if (event === undefined) { console.error("undefined event sent, why?") return; } if (event.data === undefined) { console.error("undefined event.data sent, why?") return; } if (event.data.postMessage === undefined) { console.error("undefined event.data.postMessage sent, why?") // ^ it breaks here, since postMessage is undefined return; } // .. actual code comes here, but not req
