tdesign-react/lib/anchor/_util/dom.js

TDesign Component for React

/**
 * tdesign v1.11.6
 * (c) 2025 tdesign
 * @license MIT
 */

import raf from 'raf';
import { easeInOutCubic } from '../../_util/easing.js';

function getOffsetTop(target, container) {
  var _target$getBoundingCl = target.getBoundingClientRect(),
    top = _target$getBoundingCl.top;
  if (container === window) {
    return top - document.documentElement.clientTop;
  }
  return top - container.getBoundingClientRect().top;
}
function isWindow(obj) {
  return obj && obj === obj.window;
}
function getScroll(target, isLeft) {
  if (typeof window === "undefined" || !target) {
    return 0;
  }
  var method = isLeft ? "scrollLeft" : "scrollTop";
  var result = 0;
  if (isWindow(target)) {
    result = target[isLeft ? "pageXOffset" : "pageYOffset"];
  } else if (target instanceof Document) {
    result = target.documentElement[method];
  } else if (target) {
    result = target[method];
  }
  return result;
}
function scrollTo(target, opt) {
  var _opt$container = opt.container,
    container = _opt$container === void 0 ? window : _opt$container,
    _opt$duration = opt.duration,
    duration = _opt$duration === void 0 ? 450 : _opt$duration,
    _opt$easing = opt.easing,
    easing = _opt$easing === void 0 ? easeInOutCubic : _opt$easing;
  var scrollTop = getScroll(container);
  var startTime = Date.now();
  return new Promise(function (res) {
    var _fnc = function fnc() {
      var timestamp = Date.now();
      var time = timestamp - startTime;
      var nextScrollTop = easing(Math.min(time, duration), scrollTop, target, duration);
      if (isWindow(container)) {
        container.scrollTo(window.pageXOffset, nextScrollTop);
      } else if (container instanceof HTMLDocument || container.constructor.name === "HTMLDocument") {
        container.documentElement.scrollTop = nextScrollTop;
      } else {
        container.scrollTop = nextScrollTop;
      }
      if (time < duration) {
        raf(_fnc);
      } else {
        raf(res);
      }
    };
    raf(_fnc);
  });
}

export { getOffsetTop, getScroll, scrollTo };
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