Function closest

modular/sortable.complete.esm.js:158–170

( /**HTMLElement*/el, /**String*/selector, /**HTMLElement*/ctx, includeCTX)

  return el.host && el !== document && el.host.nodeType && el.host !== el ? el.host : el.parentNode;
}
function closest( /**HTMLElement*/el, /**String*/selector, /**HTMLElement*/ctx, includeCTX) {
  if (el) {
    ctx = ctx || document;
    do {
      if (selector != null && (selector[0] === '>' ? el.parentNode === ctx && matches(el, selector) : matches(el, selector)) || includeCTX && el === ctx) {
        return el;
      }
      if (el === ctx) break;
      /* jshint boss:true */
    } while (el = getParentOrHost(el));
  }
  return null;
}
var R_SPACE = /\s+/g;
function toggleClass(el, name, state) {
  if (el && name) {