postMessage( )

Sends a message to a page's parent.

If a page is embedded within another site, using an HtmlComponent on a Wix site or an iframe on a non-Wix site, call this method to send a message from the inner site to the outer site.

When the parent site is a Wix site, call onMessage() to receive the message on the parent page.

When the parent site is a non-Wix site, use the page's window.onMessage event handler to read the data property of the received MessageEvent to receive the message on the parent page.