title: Options for creating custom dialogs in Sitecore
body: <p>I need to implement some pop-up dialogs in sitecore. The popups are used in an existing angular site and I would like to reuse as much as possible.</p>
  
  <p>Use case: From a sitecore form activate the dialog, init the dialog with data from the sitecore field. If the user presses OK, then write back the new value to the site core field.</p>
  
  <p>I know that sitecore has an IFrame type but I know that the browser will not allow me to write back to the parent window from a site in another domain.</p>
  
  <p>So what options do I have? </p>