antd-mobile/cjs/utils/get-scroll-parent.js

<div align="center">

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getScrollParent = getScrollParent;
var _canUseDom = require("./can-use-dom");
const defaultRoot = _canUseDom.canUseDom ? window : undefined;
const overflowStylePatterns = ['scroll', 'auto', 'overlay'];
function isElement(node) {
  const ELEMENT_NODE_TYPE = 1;
  return node.nodeType === ELEMENT_NODE_TYPE;
}
function getScrollParent(el, root = defaultRoot) {
  let node = el;
  while (node && node !== root && isElement(node)) {
    if (node === document.body) {
      return root;
    }
    const {
      overflowY
    } = window.getComputedStyle(node);
    if (overflowStylePatterns.includes(overflowY) && node.scrollHeight > node.clientHeight) {
      return node;
    }
    node = node.parentNode;
  }
  return root;
}