Dynamic iframe height for embeds (postMessage or iframe-resizer)

I want to embed Featurebase changelog and roadmap pages as iframes in our web app and have them dynamically resize to match their content height. This would allow the host page to handle scrolling instead of the iframe. Specifically, I'm looking for: 1. A postMessage API that sends height events (on load, expansion, etc.). 2. A URL parameter like autoHeight=true. 3. Support for the iframe-resizer library (inclusion of iframeResizer.contentWindow.min.js). This is important because content height varies significantly (e.g., "Continue Reading" expansion) and depends on screen width, making a static height fallback non-viable.