ember-sortable/addon-test-support/utils/offset.js

Sortable UI primitives for Ember.

/** Vanilla Javascript equivalent of JQuery's `.offset`.
  * Reference: https://github.com/nefe/You-Dont-Need-jQuery
  *
  * @method getOffset
  * @param {Element} el an element
  */
export function getOffset(el) {
  const box = el.getBoundingClientRect();

  return {
    top: box.top + window.pageYOffset - document.documentElement.clientTop,
    left: box.left + window.pageXOffset - document.documentElement.clientLeft,
  };
}