Targeting a lightbox

[ghost]

I need to target a lightbox that has a fixed position and z-index to the center of a page with other chardin elements, but I only want them displayed for the lightbox.

Currently I can fire a chardinjs start from the body to show all overlay elements, but when I target the lightbox I get an unhelpful console error:

Uncaught TypeError: Cannot read property 'offsetWidth' of undefined

I'd like to only start chardin for the child elements of the selector, is this possible?
ex: $('.the-lightbox').chardinJS('start')

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