What you are wanting to do is impossible. We will build a small working sample to learn it practically. Then use iframe.contentWindow.document.getElementById($id) as outlined here: How to pick element inside iframe using document.getElementById. Extracting arguments from a list of function calls. Handlebars works in a similar way, with variables in double handlebars, {{variable}}, being escaped. Take an RSS reader as an example. Why did US v. Assange skip the court of appeal? Ubuntu won't accept my choice of password. But, there is the risk that the source may have malicious scripts embedded in itadded by either the developer of the source or by a malicious third-party. Get the first