gui-one-nutui-react-taro/dist/esm/backtop.taro-99107c30.js

京东风格的轻量级移动端 React 组件库，支持一套代码生成 H5 和小程序

import _slicedToArray from "@babel/runtime/helpers/slicedToArray";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
import React__default, { useState } from 'react';
import Taro, { usePageScroll } from '@tarojs/taro';
import { I as Icon } from './icon.taro-1d0d4fb7.js';
import { C as ComponentDefaults } from './typings-1c5f2628.js';
var defaultProps = _objectSpread(_objectSpread({}, ComponentDefaults), {}, {
  bottom: 20,
  right: 10,
  elId: 'body',
  distance: 200,
  zIndex: 10,
  isAnimation: true,
  duration: 1000
});
var BackTop = function BackTop(props) {
  var _defaultProps$props = _objectSpread(_objectSpread({}, defaultProps), props),
    children = _defaultProps$props.children,
    bottom = _defaultProps$props.bottom,
    right = _defaultProps$props.right,
    elId = _defaultProps$props.elId,
    distance = _defaultProps$props.distance,
    zIndex = _defaultProps$props.zIndex,
    isAnimation = _defaultProps$props.isAnimation,
    className = _defaultProps$props.className,
    duration = _defaultProps$props.duration,
    style = _defaultProps$props.style,
    onClick = _defaultProps$props.onClick,
    iconClassPrefix = _defaultProps$props.iconClassPrefix,
    iconFontClassName = _defaultProps$props.iconFontClassName;
  var _useState = useState(false),
    _useState2 = _slicedToArray(_useState, 2),
    backTop = _useState2[0],
    SetBackTop = _useState2[1];
  // 监听用户滑动页面事件
  usePageScroll(function (res) {
    var scrollTop = res.scrollTop;
    scrollTop >= distance ? SetBackTop(true) : SetBackTop(false);
  });
  // 返回顶部点击事件
  var goTop = function goTop(e) {
    onClick && onClick(e);
    Taro.pageScrollTo({
      scrollTop: 0,
      duration: isAnimation && duration > 0 ? duration : 0
    });
  };
  var backTopClass = {
    right: "".concat(right, "px"),
    bottom: "".concat(bottom, "px"),
    zIndex: zIndex
  };
  return React__default.createElement(React__default.Fragment, null, React__default.createElement("div", {
    className: "nut-backtop ".concat(backTop ? 'show' : '', " ").concat(className || ''),
    style: _objectSpread(_objectSpread({}, backTopClass), style),
    onClick: function onClick(e) {
      goTop(e);
    }
  }, children || React__default.createElement(Icon, {
    classPrefix: iconClassPrefix,
    fontClassName: iconFontClassName,
    size: "19px",
    className: "nut-backtop-main",
    name: "top"
  })));
};
BackTop.defaultProps = defaultProps;
BackTop.displayName = 'NutBackTop';
export { BackTop as B };