Mystery: How does Google do cross-domain iframe communication?
- by Shraga
Hi everyone,
When you host Googles web search element on a page, a div is created which incorporates an iframe which points to a Google adsense ads page. However, if there are no ads for the specific query, Google somehow changes the class on YOUR domain to render the div (and iframe) invisible.
They are NOT using postMessage, as it also works in…