I think the listeners might be what you're looking for, e.g. postRedraw
or postRender
.
https://github.com/dc-js/dc.js/blob/master/web/docs/api-latest.md#listeners
Note you can also get dc.js to render into a div that is not on-screen and then reparent it. Just supply the div element itself instead of a selector for the parent parameter of the constructor.