Cannot create select from element, array of elements

Currently it only accepts querySelectorAll for getting the base objects. However we read configuration PER element and instantiate it accordingly (some have search, some not etc). It should accept: NodeList and HTMLElement.

Should be solved with something like this:

let originalSelects = [];
if(selector instanceof NodeList) originalSelects = selector;
elseif(selector instanceof HTMLElement) originalSelects = [selector];
elseif(typeof selector === 'string' || selector instanceof String)originalSelects = document.querySelectorAll(selector);
else throw new Error('Parameter for select must be... blabla');