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.
The message to send.
The target to send the message to. Must be "parent" or omitted. Default: "parent".
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.