@ohu-mobile/core/lib/_utils/dom.js

Mobile UI Toolkit

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getScrollEventTarget = getScrollEventTarget;
// github.com/youzan/vant/-/blob/src/utils/dom/scroll.ts
var overflowScrollReg = /scroll|auto/i;
function getScrollEventTarget(element) {
  var rootParent = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : window;
  var node = element;
  while (node && node.tagName !== 'HTML' && node.nodeType === 1 && node !== rootParent) {
    var _window$getComputedSt = window.getComputedStyle(node),
      overflowY = _window$getComputedSt.overflowY;
    if (overflowScrollReg.test(overflowY)) {
      if (node.tagName !== 'BODY') {
        return node;
      }
      var _window$getComputedSt2 = window.getComputedStyle(node.parentNode),
        htmlOverflowY = _window$getComputedSt2.overflowY;
      if (overflowScrollReg.test(htmlOverflowY)) {
        return node;
      }
    }
    node = node.parentNode;
  }
  return rootParent;
}