interactjs/src/utils/getOriginXY.js

Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)

const {
  resolveRectLike,
  rectToXY,
} = require('./rect');

module.exports = function (target, element, action) {
  const actionOptions = target.options[action];
  const actionOrigin = actionOptions && actionOptions.origin;
  const origin = actionOrigin || target.options.origin;

  const originRect = resolveRectLike(origin, target, element, [target && element]);

  return rectToXY(originRect) || { x: 0, y: 0 };
};