ckeditor strips out the tag. I updated the below file and removed "iframe" from the CKEDITOR.config.removePlugins row. This meant the button to insert an iframe now shows, and it appears to work as it adds a little red placeholder image for the iframe, however when you try and save it the iframe is stripped out again. How can I fix it so I can use the iframe?
You need to provide the rest of the parameters to the function.
If you look at the existing code for 'map', it specifies the name of the element (map), the type of HTML (Block), the HTML content that it can contain (Flow), abd then the default attributes (Common), and additional attributes.
You'd probably just need to change the additional attributes. Add in whatever HTML attributes you use on your iframe.