The biggest problem is that you never know when child or parent window page will be ready to receive data! Allows the resource to navigate the top-level browsing context, but only if initiated by a user gesture. Thus, you should always think about placing a warning message as a fallback for those poor users. The result is that everyone who includes your iframe in his page, will receive the messages. Window.postMessage is the native JavaScript method. The window.postMessage() method safely enables How do I stop the Flickering on Mode 13h? Multiple data items can be sent as an array. Unable to postMessage from iframe in Lightning component back You can browse them on the Mozilla Feature Policy Documentation. A good reference is here: http://softwareas.com/cross-domain-communication-with-iframes. What are the advantages of running a power tool on 240 V vs 120 V? 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. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? In the course of experimenting with click tracking and heatmaps I needed to discern the size of the content on a page loaded within an iFrame in order to resize a canvas that I was overlaying. Nice. The ultimate guide to iframes - LogRocket Blog You may wonder if an iframe or new tab window can communicate with its parent window? window.postMessage along with a message. Is there a generic term for these trajectories? Explaination: I have an iframe on my page using window.getSelection() i get the selected text, similarly i want to get the selected text from iframe. Lightning Components: Why Geolocation fields in SOQL lead to an Internal Server Error? WebNot sure why that parameter is called "origin", because it's actually the URL of the destination that you have to fill in as the second parameter of postMessage. How do I create an HTML button that acts like a link? BCD tables only load in the browser with JavaScript enabled. if I integrate content via iFrame into a WP page is there a way I can avoid thrd parties to open the iFrame content without opening the complete page? Note: The sandbox attribute is unsupported in Internet Explorer 9 and earlier. the same as the intended receiver of the message containing the password, to prevent It only takes a minute to sign up. I'm developing a Lightning Component in which I'd like to re-use some functionality I have developed and hosted externally. the targetOrigin argument be "*". The most relevant answer I found was from this articleand todays conclusion seems to be: Since search engines consider the content in iframes to belong to another website, the best you can hope for is no effect. the sending browsing context. The second parameter of your postMessage must be an url like http://localhost I believe that their bad reputation should not prevent you from relying on them. 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. properties have their expected values.). When you are using an iframe, you are mostly dealing with content coming from a third party over which you have no control. Thus, you are increasing the risk of having a potential vulnerability in your application or simply having to deal with a bad user experience (like annoying video auto-play ). 1999 2023 Viget Labs, LLC. Allows access the Accelerometer interface, Allows access the AmbientLightSensor interface, Allows access to the Sensors API Gyroscope interface, Allows access to the Sensors API Magnetometer interface. Webjavascript postMessage not working. This mechanism provides control over where And this isn't even cross-domain : both frames are from my domain. * targetOrigin. Looking for job perks? Terms Where should I put