Window.postMessage script.google.com as a popup

Question

At startup: MyPopWindow.postMessage ("Test", " mydomaine "); I have an error in MyPopWindow whith script.google.com:

(program): 1 Failed to execute 'postMessage' in 'DOMWindow': target ( mydomaine ) does not match the beginning of the recipient window (' https://script.google.com ').

On startup: MyPopWindow.postMessage ("Test", " https://script.google.com '); I have an error in MyPopWindow:

dropping postMessage .. was from the mydomaine host, but the expected host is https: // ****** - script.googleusercontent.com

Source on mydomaine page:

window.addEventListener("DOMContentLoaded", function() { window.addEventListener("message", function(e) { // wait for child to signal that it loaded. if ( e.data === "loaded" && e.origin === iframe.src.split("/").splice(0, 3).join("/")) { // send the child a message. alert(e.data); } }) }, false) 

Source in Google Apps Script, acting as WebApp:

  document.addEventListener('DOMContentLoaded', function () { // signal the parent that we're loaded. window.parent.postMessage("loaded", "*"); // listen for messages from the parent. window.addEventListener("message", function(e) { if(event.origin !== 'mydomain') return; var message = e.data; alert(message); }, false); }); 

Answer 1

This error message appears from one of the Javascript driver file application scripts. This is an additional protection Google has added to prevent users from using postMessage.

It seems that Google wants to force you to use one of its accepted protocols for communication between windows / domains, namely the execution API . I tried using other methods, such as passing URL parameters, but so far no one has worked, because I could not access them from the iframe, in which all application scripts were run.

I believe the best option would be the Execution API.

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