The scenario is depicted below: Security Aspects. postMessage(), and channel messaging is also known as MessageChannel. In Edge, it does not work. Het probleem: cross-domain security Stel we hebben een html pagina met daarin een iframe en een javascript functie: [crayon-5da5e543eb37f086972588/] En een iframe source pagina op een ander. Look into window. Is it forbidden to communicate with hosts, all on the same domain, through canvas eventing, other than the one explicitly set in the connected app?. A very private tech blog. That’s possible with using 3rd party domain to store global encrypted session information and cross domain communication mechanism. Prior to HTML5, web browsers disallowed cross-site scripting, to protect against security attacks. Click on the browser support icon or the technology tag to filter the demos (the filter is an OR filter). And we also need to check the origin of the event or Url of Originating window/IFrame. postMessage 允许来自不同源的脚本采用异步方式进行通信,可以实现跨文档文档、多窗口、跨域信息传递。用于多窗口间数据通信。 用途之一就是我们常被面试官问及的跨域存储问题。 API otherWindow. Bypass SCORM’s browser cross-domain JavaScript restrictions in one of two ways: The first way, which is better, is through HTML5 postMessage, which allows you to send data messages between two windows/frames across domains. postMessage() enables safe and secure cross-origin communication. e the cross domain page that you are making request. hash communication method for all other browsers (IE6, IE7, Opera). opener() methods. Almost every website had a loss in one or more ways XSS. With the addition of the window. How do I send a cross-domain POST request via JavaScript? Notes - it shouldn't refresh the page, and I need to grab and parse the response afterward. HTML 5 postMessage method allow cross-origin communication which is supported by all modern browsers allowing communication between different domains. I have created an example demonstrating communication between a wrapper and an AngularJS application within an IFrame using postMessage. In particular, JavaScript's AJAX calls can use the XMLHttpRequest mechanism. Your help with some code examples will be much appreciated. Here is a list of notable libraries and plugins. Links & Resources for making cross-domain requests. Even though the Same Origin Policy prevents direct access to the objects and properties in the document, postMessage can be used to ask the document on the other domain to perform the tasks and provide the needed information. contentWindow есть метод postMessage. It controls when scripts running in a browser can communicate with one another (roughly, when they originate from the same website). Not everything is planned or announced yet and some things may get moved or cancelled. One of the problems with this approach is that the server becomes full of image files that will be never used. opener() methods. it won't work, you have to use postMessage and message event to talk between protocols. 答案:string,boolean,number,undefined,function,object 2. Wie zegt dat cross domain iframe events en function calls niet mogelijk zijn? postMessage is hier de oplossing. The first solution doesn’t resolve the “loss of a game state” problem. postMessage 는 cross domain 간 데이터를 주고 받는데 아주 유용한 기법을 제공 합니다. Demonstrating Cross-Domain Interaction with an Iframe The example below shows how to use postMessage to interact with a document in an iframe when that document is on another domain. As you may know, LocalStorage is domain based. This is very interest feature. JSON-P is subject to cross-site request forgery (CSRF or XSRF) attacks because the tag is not restricted by the same-origin policy. There is a simple demo in http://ejohn. AJAX cross domain call. If a browser does not support postMessage, CORS, etc. com domain name of the JS cannot operate b. That’s possible with using 3rd party domain to store global encrypted session information and cross domain communication mechanism. That solution relied on hitCallback to decorate the iframe, and now that I look back on it, it has its shortcomings. 0 content, its relation to Cross-Origin Resource Sharing (CORS) and Rich Internet Applications, and the next generation SOP. This is how it can be done using JS/jQuery, and some fine jQuery plugins. Email | Twitter | LinkedIn | Comics | All articles. 0 feature called postMessage via SP. In particular, JavaScript's AJAX calls can use the XMLHttpRequest mechanism. com), we can make the browser ignore that difference, so that they can be treated as coming from the “same origin” for the purposes of cross-window communication. This is a JavaScript solution, so it works on the client side. Bypass SCORM’s browser cross-domain JavaScript restrictions in one of two ways: The first way, which is better, is through HTML5 postMessage, which allows you to send data messages between two windows/frames across domains. This was originally raised in Gutenberg Github and closed as it's now a core issue; https. postMessage is a new feature in HTML5. Setting the height of a cross-domain iframe using postMessage. One thing that many are using easyXDM (and other cross-domain hacks) for, is to dynamically change the size of embedded iframes based on the contents size, so as to avoid the scrollbars. Modern browsers now support cross-window/cross-domain/cross-origin messaging through window. What makes this feature really nice is that all the next-generation browsers support it: Internet Explorer 8, Firefox 3, Opera 9, and Safari nightly. Demonstrating Cross-Domain Iframe-Parent Interaction The example below demonstrates an iframe using postMessage to interact with its parent document when that document is on another domain. There is a simple demo in http://ejohn. The postMessage() function works only on browsers that support HTML 5, so SharePoint Add-ins that use the cross-domain library will not work on older browsers. It is the way for documents to separates browsing context to share the data. La première (et. Target iframe: About Me/ Contact. As an alternative for IE, i tried opening crossdomain child page in iframe. Facebook uses three approaches, the HTML5 postMessage, Flash, and FIM, but their implementation is not very good as they are overlooking several other techniques and. Communicating between Lightning Components and Visualforce Pages. The proxy-based model supports fine-grained access control for elements that belong to different sources in web mashups; and the design guarantees the confidentiality, integrity, and. App Parts are rendered in IFrames. Links & Resources for making cross-domain requests. So, our task at the frontend recently was to eliminate this troublesome middleman and find a solution for cross-domain iframe communication. Scenario Following is the scenario: 1. But if you are interested in joining, I'd be happy to welcome you at one of those events. postMessage communication in browsers that support it (FF3, Safari 4, IE8), while falling back to a document. Communication between iframes with React and postMessage for an html template editor August 10, 2017 | 6 Minute Read I’m working on a project where I need some sort of simple landing page editor, where “blocks” are defined at the template level and they can be rearranged, text changed or added, and not much more. HTML 5 Demos and Examples. The unsafe way is to simply have the code in the iframe access the plugin via window. There is one more way (using html5 feature). postMessage used for sending data from popup to parent page (works in IE) - index. In this article we can explore the JavaScript cross domain issue while using App Parts. A lot of the cross-domain code has been completely rewritten. These do not work until it is available. Origin being the message domain origin and source being a reference to the window object. Please note that each page that will be displayed in the iFrame will need to have this logic with its own page height passed via the postMessage function. Stellen Sie sich zwei Webseiten:. More on window. Finally an answer for mashups and cross-domain widget developers. People say that iframes are old and useless for us, but I think they wrong. postMessage. In the new SharePoint App model, web parts are replaced with app parts. Validation. easyXDM - Makes use of all possible cross-domain AJAX request methods and workarounds. If the target domain is compromised, the local domain becomes vulnerable as well. jQuery postMessage enables simple and easy window. Cross-Domain AJAX Request methods CORS (Cross-Origin Resource Sharing) CORS is a mechanism that allows resources on a web page to be requested from another domain outside the domain the resource originated from. Due to cross-domain issues the App Part cannot invoke the parent page's method. Stellen Sie sich zwei Webseiten:. cross-domain data sharing, cross-origin communication, postMessage, window. This concludes that, though we are working on cross-domain sites using MVC applications, we can communicate between them! Happy coding!! “Vishal Himane is a consultant at Systems Plus. The following is an example of cross-origin resource sharing, where an application that embeds Dundas BI communicates with it. My code does more or less the following: A script loaded in WebsiteA. That’s because of the Cross Domain Policy that makes this not possible. Combined with the 1 last update 2019/11/01 retailer’s everyday price breaks on national clothing brands, shoes, accessories, housewares and more, new cardholders have the 1 last update 2019/11/01 opportunity to cross a Tamu Cse Vpn ton of items off their wish list on the 1 last update 2019/11/01 cheap. 转之:https://www. There was one limitation in IE8 in that HTML postMessage could only be used within an IFrame, so Facebook has gone ahead and implemented the suggested workaround. The HTML 5 spec says, "When a script invokes the postMessage(message, targetOrigin) method on a Window object,". postMessage(msg, '*') Возвращает undefined, хотя у объекта frameEl. This plugin can get contents of iframe and set height of iframe automatically. And do not be shy to share this article. 1 source is main page (http://a. 17609 This is a multi-part message in MIME format. domain) ajax call version xRequest("/ajax/",{t:"POST",p:"a=b¶m=test"}); old browser = hash. Look into window. For a long time sending messages between windows was only possible if the windows used the same protocol, port, and host. It has brought a lot of new features to the. The following is an example of cross-origin resource sharing, where an application that embeds Dundas BI communicates with it. Természetesen, nekünk fontos, hogy valahogyan kommunikálni tudjunk a behúzott, másik domain alatt található fájlal! Itt jön képbe a postMessage() eljárás! Küldő oldal kódja. Rarely someone would need to use postMessage across nested iframes in cross domain scenario, but I came across this the other day:. You could only use CustomEvent and dispatchEvent on the iframe and listen to it on the parent window. I have created an example demonstrating communication between a wrapper and an AngularJS application within an IFrame using postMessage. One example where this plugin is useful is when a child Iframe needs to tell its parent that its contents have resized. south-league. postMessage is an effort to bring a safe, event-based cross-domain messaging API to the browser. Javascript & HTML 5 - Chiamate cross-domain usando iFrame, postMessage e localStorage. Entiendo que esto es debido a la seguridad del explorador de modelos, y he estado leyendo sobre el uso de postMessage para la comunicación entre las dos ventanas, pero no me parece para averiguar cómo enviar una recarga de llamar a los padres con ella. Create, Share, and Debug HTML pages and snippets with a cool new web app I helped create: pagedemos. 1 2 Parent window uses send() method of scroll object to send scroll from top value of the document. You can simply call it cross domain data sharing. This shouldn’t come as a surprise, since the postMessage API was meant to provide cross-domain communication and is used in other app scenarios. postMessage 的作用就是传递数据,而 onmessage 的作用就是接收数据。掌握此组 API 对以后开发 HTML 5 应用程序将会有所帮助。本文 Web Workers,Cross-document messaging,WebSockets 的代码在 Firefox 14 下通过测试,Server-Sent Events 的代码在 Chrome 16 下通过测试。. When you call a function on an external iframe from the parent window, Javascript won’t allow it. ho cercato per lungo tempo e non riusciva a farlo funzionare. sigh Um, this is a good thing. Accesssing cookies of another domain using Iframes and Javascript. So, all hopes for cross-domain user tracking are still doomed. The web application is running on a different domain then SharePoint and then you’ll face cross-domain issues. html explaining why postMessage events are faster than setTimeout handlers. URL fragment hack. postMessage(message,targetOrigin) 方法是html5新引进的特性,可以使用它来向其它的window对象发送消息,无论这个window对象是属于同源或不同源,目前IE8+、FireFox、Chrome、Opera等浏览器都已经支持window. Note that you should also be able to specify which origins you trust (at least you can in the WebApi CORS library). Hello Your Desktop configured for report server is setup with cross report drill through options. There was one limitation in IE8 in that HTML postMessage could only be used within an IFrame, so Facebook has gone ahead and implemented the suggested workaround. postmessage is a simple wrapper for window. HTML 5 postMessage method allow cross-origin communication which is supported by all modern browsers allowing communication between different domains. I found postMessage() method, it works only in chrome & firefox. My code does more or less the following: A script loaded in WebsiteA. This sample demonstrates basic Service Worker registration, in conjunction with using the postMessage interface to communicate with the service worker controlling the page. Hier muss man auch im Kopf behalten, dass es die same-origin policy nicht umsonst gibt und postMessage mit Vorsicht zu genießen ist. postMessage allows for sending data messages between two windows/frames across domains. You can't read or write from localstorage that's on different domain, even if that's subdomain. Hi to all who have dealt with the cross domain issue when working with iFrames – it can be a tedious endeavour yet using Google Tag Manager and Universal Analytics the process is somewhat simplified. But at the same time safety limits to injection of iframe or Ajax application has brought a lot of trouble. postMessage 는 cross domain 간 데이터를 주고 받는데 아주 유용한 기법을 제공 합니다. Sometimes you need to communicate with these iframes but due to cross origin security reasons you are not able to do it. 위 URL 참고 하시면. postMessage. Home > javascript - HTML5 postMessage returns undefined javascript - HTML5 postMessage returns undefined I am trying to do cross-domain communication using postMessage between a page (on example1. The call of it looks as follows:. Cross Domain Library. HTML 5 postMessage method allow cross-origin communication which is supported by all modern browsers allowing communication between different domains. javascript - iframe conentWindow postMessage to cross domain action, message event. This is because any. com (so that their common second-level domain is site. Even though the Same Origin Policy prevents us from directly accessing objects and properties in the document, we can use postMessage to ask the document on the other domain to perform the tasks and provide the information we need. Target iframe: About Me/ Contact. Responsively keep same and cross domain iFrames sized to their content with support for window/content resizing, multiple and nested iFrames. You might need to. look into postMessage and window. Here is the syntax:. postmessage was specifically implemented to resolve the cross domain policy problem, safely (well as safe as possible. postMessage, how can i access to parent page within the popup ? I tryed window. I note this. postMessage方法。. In this article, we will discuss HTML5 Web Messaging (or Cross Domain Messaging) attack vectors and security implementations. 2019-07-21 javascript html5 cross-domain html postmessage JavaScript. some_cordova_plugin. 자세한 spec 은. jQuery postMessage: Cross domain scripting goodness. That may work since the parent "window" is not served, and so you might be able to skip any cross-domain access problems. We knew what the answer was: the PostMessage API. This is very interest feature. Prior to HTML5, web browsers disallowed cross-site scripting, to protect against security attacks. Another new feature from the HTML 5 specification, that just landed for Firefox 3, is the cross-origin postMessage API. contentWindow есть метод postMessage. Cross Domain ExtJS File Uploading September 17, 2015 October 2, 2015 Joe Uploading forms is a basic operation for most applications along with other asynchronous requests, many which may go cross domain. Uncaught DOMException: Blocked a frame with origin "null" from accessing a cross-origin frame. Cross-document messaging is often referred to by its syntax as window. Some years ago, I wrote a post on how to track cross-domain iframes when using Google Tag Manager and Google Analytics. e the cross domain page that you are making request. The “message” event is not even fired on the host page. Using postMessage to post messages between windows & iframes. For SharePoint, the cross-domain library is loaded on a page of the remote web application where it creates a hidden iFrame that hosts a special proxy page from the SharePoint domain. These two frame can belong to two different domains as well. Facing a cross domain issue. I quickly realized that this was the mechanism I needed to use, but that I couldn’t use the cross domain library itself because it goes from a remote page to a SharePoint service and I needed to go from a SharePoint page to a. We need to do a cross domain message return from a child window that was opened by a site but is on another server/site and window. This post is article 19 from the 30 Articles App series for SharePoint In this article, I will discuss about Cross-Domain Calls, what are they and how to make it happen for Apps. name cross domain data transmission implementation. This is because any. There are many libraries built around cross-domain AJAX problem. For one, the older solution used hitCallback which, while being. Described as “perfect for 1 last update 2019/10/21 the 1 last update 2019/10/21 Nintendo Switch“, this port is a Vyprvpn Iphone Settings cross-play and cross-platform program that will allow players to put the 1 last update 2019/10/21 small game on the 1 last update 2019/10/21 big screen. There are many places where you can use Visualforce pages in Lightning Experience. Makes sense since Cross Domain access is. These do not work until it is available. I’ll fill in the gaps a bit more here to help developers looking to implement this themselves. postMessage allows for sending data messages between two windows/frames across domains. I note this. 2019-07-21 javascript html5 cross-domain html postmessage JavaScript. So, all hopes for cross-domain user tracking are still doomed. If the target domain is compromised, the local domain becomes vulnerable as well. Jquery is just a JavaScript library. But it’s possible since Javascript introduced postMessage. Cross Domain Library. Handling 'message' Events. We had a similar problem accesing different domains on an iframe while creating a newer tool on a cms. jQuery postMessage enables simple and easy window. This sample demonstrates basic Service Worker registration, in conjunction with using the postMessage interface to communicate with the service worker controlling the page. These messages can be text, or an object in JSON format ( JavaScript Object Notation ) —something already available in most of modern web browsers. postMessage. These do not work until it is available. Place the domain that will be hosting the Dundas BI iframe into this text field, then click the submit button at the bottom of the dialog to save your changes. __markCompiled)c. postMessage does not work” to “opener is undefined in popup” David G. HTML 5 experimentation and demos I've hacked together. How to Enable CORS. Responsively keep same and cross domain iFrames sized to their content with support for window/content resizing, multiple and nested iFrames. Cross domain iframe communication using window. That may work since the parent "window" is not served, and so you might be able to skip any cross-domain access problems. Download jquery postmessage Free Java Code Description. The reason it has to be in the response is because it's the server telling the browser "yes, we will trust and accept requests from you and your domain origin". Methods, systems and computer program products are provided in which a first “sender” web browser window that is within a first domain can communicate with a second “target” web browser window that is within a second, different domain. name cross domain data transmission is realized. There are many libraries built around cross-domain AJAX problem. HTML 5 Demos and Examples. So neither set of standards is perfect in this regard, but SCORM really suffers. postMessage() is allow javascript to communicate cross domain. Iframe is an old HTML element which lets you load another page inside your current page. Starting with this ideas I immediately struggled with browser security restrictions. Cross-origin script example. Also, a lovely attack surface. Demonstrating Cross-Domain Interaction with an Iframe The example below shows how to use postMessage to interact with a document in an iframe when that document is on another domain. postMessage does not work” to “opener is undefined in popup” David G. Category: HTML One of the cool new features in HTML 5 is Cross Document Messaging. postMessage() and worker. > Specifically, does the postMessage send data across tab/process > boundaries? (If there is guidance here in an updated draft I apologize, > can't seem to find it!) Yes, it is supposed to work cross-tab (and cross-process, if tabs are in different processes). log(frameEl. If a browser does not support postMessage, CORS, etc. postMessage allows for sending data messages between two windows/frames across domains. In the new SharePoint App model, web parts are replaced with app parts. easyXDM is a library providing a flexible, reliable, secure and easy to use solution for Cross Domain messaging and Remote Procedure Calls. delphi – 在主线程(Lazarus)的上下文中执行代码. 557Z I just found out that it behaves correctly if the popup window always stays on the same protocol, if it switches from https to http, then opener gets unset. I added a comment to cross-domain-message-event-dispatch. It's a lot like Ajax but with cross-domain capability. 本篇說明如何使用 HTML5 提供的 postMessage API,來做到安全的跨域傳值,並提供非常實用的範例。. That may work since the parent "window" is not served, and so you might be able to skip any cross-domain access problems. Với những hiểu biết cơ bản về Cross-domain request , trong phần II này chúng ta sẽ tìm hiểu việc thực hiện Cross-domain request như thế nào ? Dựa trên sự kiểm soát của bạn với server-side mà bạn có rất nhiều lựa chọn để cho phép Cross-Domain request tới Server-side của mình. First thing I tried to was to use postMessage to send a message from iframe to its parent. postMessage is supported, the passed event will have. Hello Your Desktop configured for report server is setup with cross report drill through options. origin and. This is because any. J'ai le contrôle des deux côtés mais le contenu vient de deux domaines différents. Uncaught DOMException: Failed to execute 'postMessage' on 'Window': Invalid target origin '' in a call to 'postMessage'. parent, window. php at the top of your server-side script (handles HTTP response headers). postMessage is an effort to bring a safe, event-based cross-domain messaging API to the browser. delphi – 在主线程(Lazarus)的上下文中执行代码. HTML 5 postMessage() API allows cross-domain messaging 11 May 2008. Working example of window. In the new SharePoint App model, web parts are replaced with app parts. 本篇說明如何使用 HTML5 提供的 postMessage API,來做到安全的跨域傳值,並提供非常實用的範例。. 1 source is main page (http://a. domain) 2 source is sub page (http://b. Iframe is an old HTML element which lets you load another page inside your current page. postMessage ist sicher keine Funktion die man jeden Tag braucht, aber durchaus nützlich wenn man vor den Problemen der cross-origin Kommunikation steht. you do it using easyXDM. Code used in this page. Handling 'message' Events. 7 is a flowchart of operations for creating a target window that facilitates certain cross-domain communications according to embodiments of the present disclosure. Drawing state machine. Here is a list of notable libraries and plugins. For SharePoint, the cross-domain library is loaded on a page of the remote web application where it creates a hidden iFrame that hosts a special proxy page from the SharePoint domain. Wie zegt dat cross domain iframe events en function calls niet mogelijk zijn? postMessage is hier de oplossing. I don't want the sites I visit to be. How to Enable CORS. Place the domain that will be hosting the Dundas BI iframe into this text field, then click the submit button at the bottom of the dialog to save your changes. postMessage() method gives a provision for sending cross-domain data messages between two browser windows (or a current window and an inner iframe) safely, which otherwise is restricted to the same domain, same protocol, and same port number. I have done this requirement with the help of the postMessage method. it will fall back to hacks (flash, etc. Here's how I used postMessage to get the height and width of a document in an iFrame. Why is it important to understand HTML5 attacks? HTML5 is one of the emerging technologies for next generation Web applications. We should always send the targetOrigin parameter as the Url of the target window/Parent window. ",fe=3D"1 = match",ge=3D"Every change you make is automatically = saved. Yep, that's because CORS is meant to stop cross domain requests. This method will call window. Another new feature from the HTML 5 specification, that just landed for Firefox 3, is the cross-origin postMessage API. Place the domain that will be hosting the Dundas BI iframe into this text field, then click the submit button at the bottom of the dialog to save your changes. In der Dokumentation für postMessage bedeutet, dass cross-domain-messaging ist möglich. Uso postMessage que es soportado por todos los navegadores HTML5 para cross-domain de comunicación. postMessage 的作用就是传递数据,而 onmessage 的作用就是接收数据。掌握此组 API 对以后开发 HTML 5 应用程序将会有所帮助。本文 Web Workers,Cross-document messaging,WebSockets 的代码在 Firefox 14 下通过测试,Server-Sent Events 的代码在 Chrome 16 下通过测试。. This was originally raised in Gutenberg Github and closed as it's now a core issue; https. Described as “perfect for 1 last update 2019/10/21 the 1 last update 2019/10/21 Nintendo Switch“, this port is a Vyprvpn Iphone Settings cross-play and cross-platform program that will allow players to put the 1 last update 2019/10/21 small game on the 1 last update 2019/10/21 big screen. In this post, we will see how we can send data to another domain. __markCompiled();(function(){var h=c. In the course of experimenting with click tracking and heatmaps I needed to. I have an html page in www. sigh Um, this is a good thing. So neither set of standards is perfect in this regard, but SCORM really suffers. postMessage() is allow javascript to communicate cross domain. Request PDF on ResearchGate | Secure cross-domain cookies for HTTP | Cookies represent an important element of HTTP providing state management to an otherwise stateless protocol. postMessage with a hidden iframe, I'm not sure if it works in IE7 (didn't test that,) but I've tested it and it works in IE8+ Browsers check for and disable cross-domain. Wednesday, December 14, 2016. But I wouldn't count on it. I previously discussed using window. Using HTML 5 postMessage. For storage we can use either cookies and html5 localStorage and for communication we will look at using postMessage. 1 2 Parent window uses send() method of scroll object to send scroll from top value of the document. com domain name of the object. It would not surprise me to see that working in older Android and not newer, Windows phone, but not iPhone ( just as an example). postMessage (cross domain) Message. Posted on 2014-10-12 2016-06-24; After I learned about 4 types of implementing cross-domain scripting I thought that it would be nice to create. Even though the Same Origin Policy prevents direct access to the objects and properties in the document, postMessage can be used to ask the document on the other domain to perform the tasks and provide the needed information. There was one limitation in IE8 in that HTML postMessage could only be used within an IFrame, so Facebook has gone ahead and implemented the suggested workaround. Web Messaging or cross-document messaging, is an API introduced in the WHATWG HTML5 draft specification, allowing documents to communicate with one another across different origins, or source domains while rendered in a web browser. To address this problem, we propose a secure client-side cross-domain communication mechanism facilitated by a trusted proxy and the HTML 5 postMessage method. Icons Source Files. For SharePoint, the cross-domain library is loaded on a page of the remote web application where it creates a hidden iFrame that hosts a special proxy page from the SharePoint domain. Facebook uses three approaches, the HTML5 postMessage, Flash, and FIM, but their implementation is not very good as they are overlooking several other techniques and. Publish to web URL with pageName is not working (previously it work fine till today [17. With easyXDM this is really easy: Instead of embedding the iframe using plain HTML like. In the course of experimenting with click tracking and heatmaps I needed to. 2019-07-21 javascript html5 cross-domain html postmessage JavaScript. postMessage(msg, '*') Возвращает undefined, хотя у объекта frameEl. This is a JavaScript solution, so it works on the client side. postMessage() provides us a way to securely pass messages across different window frames, even if the window has a different domain, port or a protocol. The library provides a simple API for exposing and calling procedures from windows or iFrames on different domains, and also provides several advanced features like callbacks, ACL-based access. I added a comment to cross-domain-message-event-dispatch.