tdesign-react/lib/back-top/BackTop.js

TDesign Component for React

/**
 * tdesign v1.15.1
 * (c) 2025 tdesign
 * @license MIT
 */

import { _ as _defineProperty } from '../_chunks/dep-cb0a3966.js';
import classNames from 'classnames';
import React, { useMemo, useCallback } from 'react';
import { BacktopIcon } from 'tdesign-icons-react';
import useConfig from '../hooks/useConfig.js';
import { backTopDefaultProps } from './defaultProps.js';
import useScroll from './useScroll.js';
import { scrollTo } from '../_util/scroll.js';
import useDefaultProps from '../hooks/useDefaultProps.js';
import '../_chunks/dep-eca3a3de.js';
import '../config-provider/ConfigContext.js';
import 'lodash-es';
import '../_chunks/dep-f97636ce.js';
import '../_chunks/dep-9dbbf468.js';
import 'dayjs';
import '../_chunks/dep-48805ab8.js';
import '../_chunks/dep-026a4c6b.js';
import 'raf';
import '../_chunks/dep-3a09424a.js';
import '../_util/easing.js';

function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
var getContainer = function getContainer(container) {
  if (typeof container === "string") {
    if (typeof document !== "undefined") {
      return document.querySelector(container);
    }
  }
  if (typeof container === "function") {
    return container();
  }
  return null;
};
var InternalBackTop = function InternalBackTop(props, ref) {
  var _useDefaultProps = useDefaultProps(props, backTopDefaultProps),
    theme = _useDefaultProps.theme,
    size = _useDefaultProps.size,
    shape = _useDefaultProps.shape,
    target = _useDefaultProps.target,
    visibleHeight = _useDefaultProps.visibleHeight,
    container = _useDefaultProps.container,
    duration = _useDefaultProps.duration,
    content = _useDefaultProps.content,
    offset = _useDefaultProps.offset,
    children = _useDefaultProps.children,
    cusContent = _useDefaultProps["default"],
    className = _useDefaultProps.className,
    style = _useDefaultProps.style,
    onClick = _useDefaultProps.onClick;
  var _useConfig = useConfig(),
    classPrefix = _useConfig.classPrefix;
  var scrollContainer = useMemo(function () {
    return getContainer(container);
  }, [container]);
  var _useScroll = useScroll({
      target: scrollContainer
    }),
    scrollTop = _useScroll.scrollTop;
  var defaultContent = /* @__PURE__ */React.createElement(React.Fragment, null, /* @__PURE__ */React.createElement(BacktopIcon, {
    className: "".concat(classPrefix, "-back-top__icon"),
    size: 24
  }), /* @__PURE__ */React.createElement("span", {
    className: "".concat(classPrefix, "-back-top__text")
  }, "TOP"));
  var renderChildren = children || content || cusContent || defaultContent;
  var backTopRef = React.useRef(null);
  React.useImperativeHandle(ref, function () {
    return backTopRef.current;
  });
  var visible = useMemo(function () {
    if (typeof visibleHeight === "string") {
      return scrollTop >= Number(visibleHeight.replace("px", ""));
    }
    return scrollTop >= visibleHeight;
  }, [scrollTop, visibleHeight]);
  var backTopStyle = useMemo(function () {
    return _objectSpread({
      insetInlineEnd: offset[0],
      insetBlockEnd: offset[1]
    }, style);
  }, [offset, style]);
  var cls = classNames("".concat(classPrefix, "-back-top"), "".concat(classPrefix, "-back-top--theme-").concat(theme), "".concat(classPrefix, "-back-top--").concat(shape), _defineProperty(_defineProperty(_defineProperty({}, "".concat(classPrefix, "-back-top--show"), visible), "".concat(classPrefix, "-size-s"), size === "small"), "".concat(classPrefix, "-size-m"), size === "medium"), className);
  var getBackTo = useCallback(function () {
    if (!target) return 0;
    var targetNode = getContainer(target);
    if (!targetNode) return 0;
    var rect = targetNode.getBoundingClientRect();
    var y = rect.y;
    return y;
  }, [target]);
  var handleClick = useCallback(function (e) {
    e.stopPropagation();
    onClick === null || onClick === void 0 || onClick({
      e: e
    });
    var backTo = getBackTo();
    scrollTo(backTo, {
      container: scrollContainer,
      duration: duration
    });
  }, [duration, getBackTo, onClick, scrollContainer]);
  return /* @__PURE__ */React.createElement("button", {
    type: "button",
    ref: backTopRef,
    className: cls,
    style: backTopStyle,
    onClick: handleClick
  }, renderChildren);
};
var BackTop = /*#__PURE__*/React.forwardRef(InternalBackTop);
BackTop.displayName = "BackTop";

export { BackTop as default };
//# sourceMappingURL=BackTop.js.map