Polldaddy is a plugin for WordPress and other platforms that generates surveys, polls, and quizzes publishers can insert in their content.

Marfeel uses the Polldaddy iframe to display a publisher's survey, poll, or quiz powered by Polldaddy.

Implementation details

To implement the Polldaddy extension, Marfeel copies the iframe on the frontend along with its source and the data-href attribute. 

On the backend, Marfeel inspects if the source of the iframe identified in an article is in the allowed sources. If it is, Marfeel displays the iframe on the frontend. 

The iframe's source is only loaded when it's inside the viewport. 

The Polldaddy extension is not enabled by default for the Marfeel solution, however it can be promptly activated by customer request.