@jdcfe/yep-react/lib/to-top/index.js

一套移动端的React组件库

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

var _typeof = require("@babel/runtime/helpers/typeof");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));

var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));

var _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));

var React = _interopRequireWildcard(require("react"));

var _classnames = _interopRequireDefault(require("classnames"));

var _omit = _interopRequireDefault(require("lodash/omit"));

var _reactTransitionGroup = require("react-transition-group");

var _raf = _interopRequireDefault(require("raf"));

var _noop = _interopRequireDefault(require("../_utils/noop"));

var _ToTopOutlined = _interopRequireDefault(require("@jdcfe/icons-react/ToTopOutlined"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = (0, _getPrototypeOf2.default)(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = (0, _getPrototypeOf2.default)(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return (0, _possibleConstructorReturn2.default)(this, result); }; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

var easeInOutCubic = function easeInOutCubic(t, b, c, d) {
  var cc = c - b;
  t /= d / 2;

  if (t < 1) {
    return cc / 2 * t * t * t + b;
  } else {
    return cc / 2 * ((t -= 2) * t * t + 2) + b;
  }
};

var ToTop = /*#__PURE__*/function (_React$PureComponent) {
  (0, _inherits2.default)(ToTop, _React$PureComponent);

  var _super = _createSuper(ToTop);

  function ToTop(props) {
    var _this;

    (0, _classCallCheck2.default)(this, ToTop);
    _this = _super.call(this, props);

    _this.handleScroll = function () {
      var displayHeight = _this.props.displayHeight;

      _this.setState({
        visible: window.pageYOffset > displayHeight
      });
    };

    _this.scrollToTop = function (e) {
      var _document = document,
          documentElement = _document.documentElement;
      var scrollTop = window.pageYOffset || document.body.scrollTop || documentElement && documentElement.scrollTop || 0;
      var startTime = Date.now();

      var frameFunc = function frameFunc() {
        var timestamp = Date.now();
        var time = timestamp - startTime;
        ToTop.setScrollTop({
          value: easeInOutCubic(time, scrollTop, 0, 450)
        });

        if (time < 450) {
          (0, _raf.default)(frameFunc);
        } else {
          ToTop.setScrollTop({
            value: 0
          });
        }
      };

      (0, _raf.default)(frameFunc);

      (_this.props.onClick || _noop.default)(e);
    };

    _this.state = {
      visible: false
    };
    return _this;
  }

  (0, _createClass2.default)(ToTop, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      window.addEventListener('scroll', this.handleScroll);
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      window.removeEventListener('scroll', this.handleScroll);
    }
  }, {
    key: "render",
    value: function render() {
      var _this$props = this.props,
          prefixCls = _this$props.prefixCls,
          _this$props$className = _this$props.className,
          className = _this$props$className === void 0 ? '' : _this$props$className,
          children = _this$props.children,
          style = _this$props.style;
      var cls = (0, _classnames.default)(prefixCls, className);
      var defaultElement = /*#__PURE__*/React.createElement("div", {
        className: "".concat(prefixCls, "-content")
      }, /*#__PURE__*/React.createElement(_ToTopOutlined.default, {
        className: "".concat(prefixCls, "-icon")
      }));
      var divProps = (0, _omit.default)(this.props, ['prefixCls', 'className', 'children', 'displayHeight', 'visible']);
      var visible = 'visible' in this.props ? this.props.visible : this.state.visible;
      return /*#__PURE__*/React.createElement(_reactTransitionGroup.CSSTransition, {
        in: visible,
        timeout: 300,
        classNames: 'fade',
        unmountOnExit: true
      }, /*#__PURE__*/React.createElement("div", (0, _extends2.default)({}, divProps, {
        style: style,
        className: cls,
        onClick: this.scrollToTop
      }), children || defaultElement));
    }
  }], [{
    key: "setScrollTop",
    value: function setScrollTop(parameters) {
      var value = parameters.value;
      var _document2 = document,
          documentElement = _document2.documentElement;
      document.body.scrollTop = value;

      if (documentElement) {
        documentElement.scrollTop = value;
      }
    }
  }]);
  return ToTop;
}(React.PureComponent);

ToTop.defaultProps = {
  prefixCls: 'Yep-to-top',
  style: {},
  displayHeight: 0
};
var _default = ToTop;
exports.default = _default;