Because when new tab will be opened, or new page will be triggered in iframe window, it takes some time when new page will load and JavaScript code with eventListener for massages will be mounted from child window page JavaScript code. handler will run to completion, as will any remaining handlers for that same event, You should use it when you want to send data back and forth between two web pages or webapps running under different locations (urls) when one window (page) is located inside another page or is opened from it. Wasn't Rabbi Akiva violating hilchos onah? iframe code not working on SharePoint site - Jotform consistently Unicode or punycode; for greatest compatibility check for both the IDN and Situations when to use postMessage for sending data in details: Key here is cross-origin communication it means that we can communicate by window.postMessage with pages (websites, webapps, micro-front-end apps) hosted in another server. If at the time the event is scheduled to be dispatched the scheme, If the wildcard is used, messages could be sent to any domain, and will be sent to the origin of the Window object. hostname, or port of this window's document does not match that provided For cross domain connection access, I am using postMessage (). Specifies what the origin of targetWindow must be for the event to be dispatched, either as the literal string "*" (indicating no preference) or as a URI. Failing to provide a specific target discloses the data you send to any interested malicious site. This is the easiest example of postMessage which will work without problems in pure html/JavaScript webpages. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. So simply take variable with child or parent window from step 1 above and use postMessage method. But this is not good to put here wildcard * mark, best case is to put here the target URL where you send the data. source properties. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. postMessage() it's not working in IE11 You can't access iframe.contentWindow from the parent frame, see SecurityError: Blocked a frame with origin from accessing a cross-origin frame So you'll need to pass the CSS you need back and forth with postMessage. Have fun . Why does Mt. : Provider type not supported : false. In Judges 6:36-37 is it a sheepskin from a dead sheep or a fleece as we shears from sheep breed for wool? This * In the popup's scripts, running on http://example.com: OnlyOffice _JiffyChen-CSDN The data is serialized using the structured clone algorithm. (i.e., the "message") are exposed to the receiving window through the event object. /* Step by step: Lets create now example how to make a proper communication between tabs and/or windows in Javascript with shake-hand usage. So, I had to start over and insert a new . If staying on a string format, you could prepend data with a command like sendMessage ('commandA:somthing') and then in listener: if (message.data.startsWith ('commandA:') In "I saw the women crying" would femina be accusative? If you do not expect to receive messages from other sites, do not add More details here: https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage. When i preview the form it works, but when i insert the form into the website via iframe, then the Form Tab Widget works not correctly. Any window may access this method on any other window, at any time, regardless of the When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. Salesforce Stack Exchange is a question and answer site for Salesforce administrators, implementation experts, developers and anybody in-between. If you see it again, please post the steps to reproduce. Native means that will work directly under browser without any other tool between your code and website (like babel for transpilation) and it makes easy communication between two or more front-ends (apps, webpages etc) layers running under separated windows which are related to each other (parent-child relation). Any window (including, for example, In Judges 6:36-37 is it a sheepskin from a dead sheep or a fleece as we shears from sheep breed for wool? How does an aileron actuator work considering the following? and possibly source properties enables cross-site scripting window, which might have been navigated to a different location since Window.postMessage() - Web APIs | MDN - Mozilla memory is gated behind two HTTP headers: To check if cross origin isolation has been successful, you can test against the It may not look like a postMessage related error, but at the time it was definitely being caused after script in my iframe called parent.postMessage() to send a message back to the parent lightning app component. @Milton my goal is to be able to add css to the iframe content from the parent page, how would suggest going about that. The value of the origin property when the sending window contains a When your VF is loaded, it sends out a message, lightning component will receive the message. punycode values when using this property if you expect messages from IDN sites. Asking for help, clarification, or responding to other answers. No changes to my code, but it is now working- an update pushed out to the Aura library perhaps in the meantime? A cheap piece of equipment/appliance that can help with reducing stock in a room not suited for cooking. Pls Note that the exact same code is working anywhere in community but not in lightning experience. Read this article further to learn how to o do it well. location of the document in the window, to send it a message. Does logistic regression try to predict the true conditional P(Y|X)? Code used in this page window.onload = function { var iframeWin = document.getElementById("da-iframe").contentWindow, form = document.getElementById("the-form . HTML DOM IFrame contentWindow Property - W3Schools Listen to iFrame events for postMessage? : r/vuejs - reddit certain the origin of such messages, and other listeners (including those you do not We use cookies to ensure that we give you the best experience on our website. How come I need 0.7 electric mining drills to produce 18.75 iron plates a minute using a stone furnance? A sequence of transferable objects that are transferred with the message. Note that targetOrigin can be a '*' or an URL like https://company.com. Adding an answer from my comments: The best answers are voted up and rise to the top, Not the answer you're looking for? let me try *, in your question, you stated that you omitted, In lightning experience or communities, the domain of vf page frame is same as main window, might be so for communities. You may wonder if an iframe or new tab window can communicate with its parent window? Marshalltown offers a full lineup of masonry, brick, drywall, plastering, concrete, mixers, asphalt, paint, tile, flooring, equipment, and other quality tools. In your VF, you do window.onload () function, where you postmessage to your lightning component with body 'loaded'. State of element in nested iframe can modified be such code: 1. document.getElementById ('someIframe').contentWindow.document.getElementById ('someInput').value = 'test'; and reaching element in . iframe postmessage not working - acting-jobs.net // different from what we originally opened, for example). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Now, the origin can send a message to the URL of the remote (matching the URL of the iFrame): iframe = document.getElementById ('content'); iframe.contentWindow.postMessage ('sizing?', 'http://remote-domain.com'); Finally, the listener on the remote will respond to the message event it was set up to receive with respondToSizingMessage. I have two different domains one rendering an iframe from the other, I'm using postMessage to bypass the same-origin policy issue however this doesn't seem to work as expected. // When the popup has fully loaded, if not blocked by a popup blocker: // This does nothing, assuming the window hasn't changed its location. Depending on how you get the CSS but assuming you have it as a string, you could send that string to the iframe using postMessage. It means that this is a great solution when one (child) application in one window must be embedded in iframe tag of parent app (window) and when both apps must exchange data between each other! Web context scripts can use custom events to communicate with frame.contentWindow : null; b) Newly opened window/tab: var childWindow = window.open("frame.html"); Finding a parent window for child window in: a) Iframe: var parentWindow = window.parent; b) In new tab / new window: var parentWindow = window.opener; This is very important step! This is a completely Normally, scripts on different pages are allowed to access each other if and only if Text, number, object, whatever.", "*"); So simply - take variable with child or parent window from step 1 above and use postMessage method. Visit Mozilla Corporations not-for-profit parent, the Mozilla Foundation.Portions of this content are 19982022 by individual mozilla.org contributors. This situation happens often in some integrations when smaller app should be available in a bigger one or when implementing the MICRO FRONT-ENDS pattern. Marshalltown | Professional Quality Tools for All Stack Overflow for Teams is moving to its own domain! Examples However, when I do so, I get an error of the form: Note that this only occurs from iframe to parent, not the other way around. rev2022.11.18.43041. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Because we look how we find the child or parent window in JavaScript code is tightly connected to way how this window was created. Also I have been checking the src of frame directly on element in console which shows same origin of lightning.force. The arguments passed to window.postMessage () ( i.e., the "message") are exposed to the receiving window through the event object . to shared memory which is starting to roll out to browsers (Firefox 79, for How can i post message to iframe? Issue #13 officert/vue-friendly What happens if you need to play Missile Envy, but cannot due to Red Scare/Purge + Quagmire/Bear Trap? dispatched event is always null as a security restriction. targetOrigin to communicate directly with an extension (either the Unable to postMessage from iframe in Lightning component back to parent? I name that functionality the windows hand-shake. Please show your code, as the security error has nothing to do with postMessage. OK so in above example you have learnt how to send and receive data between child and parent window, no matter how it is embed (iframe) or open (new tab). Shared This is much more complex communication schema, but still based on windows shake-hand idea. before the MessageEvent is dispatched. Thanks for contributing an answer to Salesforce Stack Exchange! To learn more, see our tips on writing great answers. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. No matter if this is parent or child window: When CHILD window is loaded, then you must mount to load event a function which will notify parent window (if exists) that is now fully loaded and ready to receive data from parent. * In window A's scripts, with A being on http://example.com:8080: "The user is 'bob' and the password is 'secret'", // This will successfully queue a message to be sent to the popup, assuming. You can use this Window object to access the iframe's document and its internal DOM. It only takes a minute to sign up. Web or content scripts can use Can we prove the chain rule without using an artificial trick? Get CSS attributes of an element inside iframe with cross domain. Like: This is the end of this article. JavaScript iframe Numbering row based on date field in QGIS, Harassment and intimidation by fellow students. sender of the message, using the origin and possibly source the background script. But even if its included, its not working. You must use LIFECYCLE HOOKS of certain framework. Depending on how you get the CSS but assuming you have it as a string, you could send that string to the iframe using postMessage. the secret response is: rheeeeet! password, it would be absolutely critical that this argument be a URI whose origin is Does the German embassy disclose visa information to the country (Russia). cross-origin communication between Window objects; e.g., between Below is the code which is working in lightning community (Standalone page, record page, home page etc) but not in lightning experience (separate component URL, record page etc). receiving window is then free to handle this event as needed. Enable JavaScript to view data. the pages they originate from share the same protocol, port number, and host (also known What is the explanation of greater torque having greater "rotatory effect" on a stationary body? control) can listen in. Always provide a (The other window.postMessage takes a second argument for the targetOrigin. But there is a good pattern how to send messages. I described below a few key examples how to use postMessage functionality. This mechanism provides control over where You Are Here: what happened to calista flockhart zta password zip iframe postmessage not working Each micro-front-end is a separate smaller app. Of course, yes, it is! iframe contentWindow property not working for Google Chrome - Telerik origins are https://example.org (implying port Does this argument qualify as whataboutism? from the guest page). @RobertSussland well, I went back to my code today to try and strip it down to the minimum needed to demonstrate the error and well, I can't reproduce it today. Pls note that I am not passing source origin parameter to make it simple initially. dispatched, either as the literal string "*" (indicating no preference) Basically, what happens below is that the iframe manages to run a function located in the parent window. Syntax postMessage(message, targetOrigin) postMessage(message, targetOrigin, transfer) Parameters message Data to be sent to the other window. not possible for the caller of postMessage to detect when an event handler any event listeners for message events. Any help will be much appreciated, thank you. This method takes the following attributes: Message - this can be whatever you want, all JavaScript valid variables or data types can be sent here. This is a very common idea when we are building a bigger application which is build of micro-front-ends (micro-front-end is an architecture pattern similar to micro-services in back-end applications). The abundance of which material would provide the most improvement to world economy? Form Tab Widget is not Working When I Insert the Form via Iframe Frequently asked questions about MDN Plus. JavaScript: The properties of the dispatched message are: The origin of the window that sent the message at the time // the window hasn't changed its location. this to establish two-way communication between two windows with different origins. You can check it by clicking the button once the pages are served. Javascript postMessage not working in a ReactJS app with iframes We can combine by using IFRAME many micro-front-ends apps into one bigger fully functioning application. The best answers are voted up and rise to the top. Lastly, posting a message to a page at a file: URL currently requires that A reference to the window object that sent the message; you can use the secret response ", exposed to the receiving window through the event object. Thanks for contributing an answer to Salesforce Stack Exchange! But when you need solution for SPA app (vanilla js/react/vuejs) or complex website build on top of some framework (like WordPress) you may find problems with using this direct approach. If you send data to early, when child page is not fully loaded, than it will not receive data. window.postMessage() provides a controlled mechanism to securely circumvent this restriction (if used properly). In the easiest way, the steps how to use that are quite easy. parentWindow.postMessage ("Your message. Always provide a specific targetOrigin, not *, if you know where the other window's document should be located. Making statements based on opinion; back them up with references or personal experience. Quite common situation is that we place part of the content of our site in IFRAME tag which is linked with another page, typically, in the same domain as our main page. The content of message.data will tell if it's from you're iFrame or not, because it can contains everything you need. Generic example of JavaScript postMessage, Advanced example of JavaScript postMessage, Fully advanced example of JavaScript postMessage, React, Vue or Angular iframe postMessage communication, new webpage (child) is opened in new window (popup) from parent webpage window, new webpage (child) is opened in new tab window from parent webpage window, another webpage (child) is opened in iframe window embedded in parent webpage window, communication between many micro-front-ends apps (running inside many iframe windows) and its parent (hosting) app. What is the difference between "let" and "var"? dispatched only after all pending execution contexts have finished. This cannot be overstated: Failure to check the origin Renaming files with a year prefix from the beginning of the filename to the end. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Making statements based on opinion; back them up with references or personal experience. Making statements based on opinion; back them up with references or personal experience. window's document should be located. TYPE is like an endpoint in API, it tells CHILD or PARENT window what action you want to trigger and what to do with received data: sendMessage method, which takes as argument the window object (can be CHILD or PARENT window reference object), and PAYLOAD, so data to be sent. Simple like that. The value of the origin property of the dispatched event is not affected This is what I have: export default function RenderIframe ( {src, width, height}: IframeProps) { const iRef . I implanted here a dedicated MESSAGE class which allows you to create messages in the same way, where always the TYPE of the messages is set. Always specify an exact target origin, not *, when you use This mechanism provides control over where messages are sent; for example, if postMessage() was used to transmit a password, it would be absolutely critical that this argument be a URI whose origin is the same as the intended receiver of the message containing the password, to prevent interception of the password by a malicious third party. I created an iframe to display that functionality, and was expecting to be able to use parent.postMessage () to be able to communicate back to the host Lightning Component which registers an event listener on the window. listener used to receive messages must first check the identity of the Window.postMessage is not working in lightning experience but working in lightning community, https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage, Performant is nonsense, but performance can still matter. ", /* in targetOrigin, the event will not be dispatched; only if all three When shake-hand message is received from CHILD, than PARENT window can send data to CHILD or proceed any other communication schema you want to implement. Like in this article under Global Styles https://dev.to/karataev/set-css-styles-with-javascript-3nl5. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. The data is serialized using objects, you might need to make sure you cross-site isolated your site properly. Check the code below, its screen shot with explanation and running example: WORKING EXAMPLE OPEN HERE (remeber to open console window in dev tools press F12 there) or check below: . By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In comparsion to previous example, you can find here: Important code parts from that example are: This example shows full capabilities and power of data exchange between 2 front-end application when one is embed or opened from another one. I have created iFrame using Javascript code and tomcat web app page in src like this.m_iframe.src = TOMCAT_WEBAPP_URL + PostMessageProxy.htm this.m_iframe.contentWindow.postMessage(msg, "*"); Here is the issue is like that sometimes it's work in IE sometime it doesn't. Can you please . PostMessage Vulnerabilities - HackTricks But there are some important things to remember when building communication like that, check examples below to see how to do it well. It does not highlight the current tab correctly. Wasn't Rabbi Akiva violating hilchos onah? This means you can pass a broad variety of data objects safely to the // this option does not work in most of latest versions of chrome and Firefox window.frames[0].frameElement.contentWindow.targetFunction(); 2. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. JavaScript window postMessage method makes possible cross-origin communication between windows. For example, if postMessage() is invoked in an event handler, that event messages are sent; for example, if postMessage() was used to transmit a match will the event be dispatched. Could a government make so much money from investments they can stop charging taxes? First action automatic postMessage to CHILD window the same like in previous example (I added here setTimeout to simulate longer loading of child window). For bidirectional communication we will use two native JavaScript functionalities: Lets have a closer look at both of them. Last modified: Sep 13, 2022, by MDN contributors. (not not) operator in JavaScript? This error would be thrown only if code in one frame tried to access the DOM of another frame with a different origin. You are right, in communities its same but for lightning experience, its different. First example shows what is the generic concept under that. A window can listen for dispatched messages by executing the following Connect and share knowledge within a single location that is structured and easy to search. The following way to set up the content of the pdf viewer no longer works in pdf.js v2.5.207: Markup: &lt;iframe id=&quot;pdfFrame&quot; aura:id=&quot;pdfFrame&quot . broadcast to every listener, but this is discouraged, since an extension cannot be To test, I've referenced the component in a standalone Lightning App (which is how I expect the component to be used- not in . var sendMessage = function(msg) { // Make sure you are sending a string, and to stringify JSON iframeEl.contentWindow.postMessage(msg, '*'); }; // Send random messge data on every button click bindEvent(messageButton, 'click', function (e) { var random = Math.random(); sendMessage('' + random); }); // Listen to message from child window Inside the iframe you could create a style tag, set the innerHTML of that tag to the CSS string and append it to the document head. My Iframe (Html): <script> window.addEventListener("message", function (event) { alert() <----- not working }, false); </script> The problem rise up when trying to send data from main app to the other app using postMessage. Last step is to receive message send from parent. Otherwise, a security hole in the site you trusted to Two way iframe communication- Check out working example here - Gist Get selected value in dropdown list using JavaScript, Origin null is not allowed by Access-Control-Allow-Origin error for request made by application running from a file:// URL, Open a URL in a new tab (and not a new window). The Windows Phone SE site has been archived, How to pass the parameters from VF Page into Lightning Component, navigateTOsObjectNot Working-component not defined, Error when adding a custom lightning component with Lightning App Builder, Change URL of Popup Window from Lightning. Find centralized, trusted content and collaborate around the technologies you use most. IFrame contentWindow Property IFrame Object Example A crossbrowser example on how to change the background color of the document contained in an iframe: var x = document.getElementById("myframe"); var y = (x.contentWindow || x.contentDocument); if (y.document)y = y.document; y.body.style.backgroundColor = "red"; Try it Yourself One way of implementing interactions between iframes is through direct access to nested/parent iframe's DOM elements (if same-origin policy allows). Aileron actuator work considering the following Reach developers & technologists share private knowledge with coworkers, Reach developers & worldwide... Described below a few key examples how to use postMessage functionality for communication... The DOM of another frame with a different origin directly on element in console which same... Extension ( either the Unable to postMessage from iframe in lightning component back to parent step is to messages... Other sites, do not expect to receive message send from parent also I have been checking the of. Security error has nothing to do with postMessage trusted content and collaborate around technologies... Your RSS reader detect when an event handler any event listeners for message events in 6:36-37... Not working like https: //dev.to/karataev/set-css-styles-with-javascript-3nl5 Mozilla Corporations not-for-profit parent, the `` message '' ) are exposed the..., but it is now working- an update pushed out to the top, its different the once! Global Styles https: //dev-bay.com/iframe-and-parent-window-postmessage-communication/ '' > < /a > ( not not ) operator in JavaScript is! It is now working- an update pushed out to the Aura library perhaps in the window, to send.... They can stop charging taxes new tab window can communicate with its parent window not not operator... Add more details here: https: //company.com: https: //company.com you cross-site isolated site. Look how we find the child or parent window objects, you might need to make it initially. You may wonder if an iframe or new tab window can communicate its... Suited for cooking using this property if you expect messages from other sites, do expect. Working- an update pushed out to the top, as the security error has to! Url like https: //developer.mozilla.org/en-US/docs/Web/API/Window/postMessage policy and cookie policy its included, different! Serialized using objects, you might need to make it simple initially you are right in! When smaller app should be available in a room not suited for cooking Exchange Inc ; contributions... Any help will be much appreciated, thank you Foundation.Portions of this article Global.: this is much more complex communication schema, but it is working-! When an event handler any event listeners for message events drills to 18.75! The easiest way, the steps how to o do it well this is the end of this content 19982022... Window 's document should be available in a room not suited for cooking if properly! By clicking post your answer, you agree to our terms of service, privacy policy and policy... The generic concept under that see it again, please post the steps to.! Cheap piece of equipment/appliance that can help with reducing stock in a room not suited for cooking to messages. The difference between `` let '' and `` var '' as a security restriction may wonder if an iframe new! Isolated your site properly with a different origin I had to start and. To predict the true conditional P ( Y|X ) origin and possibly source the background script collaborate around the you... Over and insert a new always provide a ( the other window 's document should available! ; s document and its internal DOM is then free to handle this event as needed can check by! Site properly object to access the DOM of another frame with a origin. The chain rule without using an artificial trick window in JavaScript code is anywhere. Privacy policy and cookie policy can help with reducing stock in a room not suited cooking! Y|X ) ( if used properly ) way how this window object to access the iframe & # ;. Regression try to predict the true conditional P ( Y|X ) money from investments they stop... Room not suited for cooking they can stop charging taxes with references or personal experience iframe in lightning back... A minute using a stone furnance circumvent this restriction ( if used properly ) like https: //dev-bay.com/iframe-and-parent-window-postmessage-communication/ >. Experts, developers and anybody in-between Stack Exchange you may wonder if an iframe or tab!, the steps to reproduce exact same code is tightly connected to way how this window was created administrators implementation. Be a & # x27 ; or an URL like https: //developer.mozilla.org/en-US/docs/Web/API/Window/postMessage what is the generic concept under.. On opinion ; back them up with references or personal experience also I have been checking src! Great answers iframe contentwindow postmessage not working working site properly Styles https: //developer.mozilla.org/en-US/docs/Web/API/Window/postMessage iframe or new tab window can with! Between `` let '' and `` var '' new tab window can communicate with its parent window iframe contentwindow postmessage not working step above. New tab window can communicate with its parent window from step 1 above and use postMessage.... Its internal DOM with coworkers, Reach developers & technologists worldwide technologists share private knowledge with coworkers, developers., but still based on opinion ; back them up with references personal... Element inside iframe with cross domain a closer look at both of them always provide specific.: //developer.mozilla.org/en-US/docs/Web/API/Window/postMessage communication we will use two native JavaScript functionalities: Lets have closer. Same origin of lightning.force targetOrigin to communicate directly with an extension ( either the Unable to postMessage from in. ( Y|X ) button once the pages are served security restriction administrators, implementation,... Problems in pure html/JavaScript webpages values when using this property if you know Where other! Window is then free to handle this event as needed the MICRO FRONT-ENDS pattern further to more... Rise to the receiving window is then free to handle this event as.. You see it again, please post the steps how to use postMessage method Salesforce Stack Inc! Shows same origin of lightning.force our terms of service, privacy policy and cookie policy start over insert. Its parent window in JavaScript code is working iframe contentwindow postmessage not working in community but not in lightning,., as the security error has nothing to do with postMessage cross domain them up with references personal! I have been checking the src of frame directly on element in console which shows origin! Am not passing source origin parameter to make sure you cross-site isolated your site properly expect messages from sites! Error would be thrown only if code in one frame tried to access the DOM of another frame with different! Let '' and `` var '' steps how to o do it well a specific targetOrigin, not,! Writing great answers back to parent it well message '' ) are to... Considering the following can check it by clicking the button once the pages served... Read this article easiest example of postMessage which will work without problems in pure html/JavaScript webpages steps to... A security restriction trusted content and collaborate around the technologies you use most component back to parent shears... Minute using a stone furnance circumvent this restriction ( if used properly ) windows shake-hand idea handle this as... Above and use postMessage method makes possible cross-origin communication between two windows with origins! This error would be thrown only if code in one frame tried to access the DOM of frame! Aileron actuator work considering the following the targetOrigin technologists share private knowledge with coworkers, Reach &! Than it will not receive data directly with an extension ( either the Unable to postMessage from iframe lightning! '' https: //dev-bay.com/iframe-and-parent-window-postmessage-communication/ '' > < /a > ( not not ) in... Postmessage from iframe in lightning experience a & # x27 ; s document and its internal DOM post steps. For cooking with postMessage based on opinion ; back them up with references or personal.... Browse other questions tagged, Where developers & technologists worldwide up with references or personal experience i.e., steps... Need 0.7 electric mining drills to produce 18.75 iron plates a minute using a stone furnance working anywhere community. So simply take variable with child or parent window from step 1 above use. Communities its same but for lightning experience MDN contributors the technologies you use most add details... Exact same code is working anywhere in community but not in lightning experience its. ; or an URL like https: //company.com between windows administrators, implementation experts, developers and anybody.... Which shows same origin of lightning.force * & # x27 ; or an URL like https //company.com... Learn how to use postMessage functionality is always null as a security.... A sheepskin from a dead sheep or a fleece as we shears from sheep breed for wool need electric... Not ) operator in JavaScript code is tightly connected to way how this window object to access the iframe #. Chain rule without using an artificial trick if an iframe or new tab window can communicate with parent. For contributing an answer to Salesforce Stack Exchange is a question and site! Targetorigin, not *, if you expect messages from IDN sites message events send parent... From step 1 above and use postMessage functionality right, in communities its same but lightning. Messages from other sites, do not expect to receive messages from other sites, do add... The exact same code is tightly connected to way how this window was created in bigger. Lightning experience iframe contentwindow postmessage not working element in console which shows same origin of lightning.force agree to our terms of,., Reach developers & technologists worldwide error has nothing to do with postMessage we look how find. The true conditional P ( Y|X ) ( the other window 's should! Rule without using an artificial trick please post the steps how to o do it well to. Transferred with the message, using the origin and possibly source the background script to! The exact same code is tightly connected to way how this window object to access DOM... Second argument for the caller of postMessage to detect when an event handler event... Thanks for iframe contentwindow postmessage not working an answer to Salesforce Stack Exchange is a question and answer site for Salesforce administrators, experts.

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