@jdcfe/yep-react/es/indexed-list/util.js

一套移动端的React组件库

export function _event(e) {
  if (e.touches && e.touches.length) {
    return e.touches[0];
  }

  if (e.changedTouches && e.changedTouches.length) {
    return e.changedTouches[0];
  }

  return e;
}
export function getOffsetTop(elem) {
  var offsetTop = 0;
  /* eslint no-cond-assign: 0 */

  do {
    if (!isNaN(elem.offsetTop)) {
      offsetTop += elem.offsetTop;
    }
  } while (elem = elem.offsetParent);

  return offsetTop;
}