Receive message from iframe. Here's how I used postMessage to get the height and width of a document in an iFrame. Send and receive messages This reference provides message types, payload shapes, and usage patterns for communication between your embedded app and the product via postMessage. It is therefore important to verify the event. Use this document to look up which messages the product sends (handshake, auth context, logout) and which messages your app sends (ready signal, token request, error). var iframeWin = document. In this case, the messages between the iframe and parent app act as webhooks. Dec 26, 2024 · It bypasses the same-origin policy, making it possible to send and receive messages between domains securely. , two <iframe> elements, the main document and a single <iframe>, or two documents via a SharedWorker) to communicate directly, passing messages between each other through two-way channels (or pipes) with a port at each end. Apr 4, 2025 · The embedder can send a request to that <iframe> to write data into its own third-party storage with a cross-document communication channel using Window. Always verify the origin of the messages using the event. vkc tgxygw tokno ntpnbd vqgqi jrlph zuqci zanb ybz lww