choerodon-ui/pro/es/_util/AsyncComponent.js

An enterprise-class UI design language and React-based implementation

import _extends from "@babel/runtime/helpers/extends";
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _inherits from "@babel/runtime/helpers/inherits";
import _possibleConstructorReturn from "@babel/runtime/helpers/possibleConstructorReturn";
import _getPrototypeOf from "@babel/runtime/helpers/getPrototypeOf";

function _createSuper(Derived) {
  function isNativeReflectConstruct() {
    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
    if (Reflect.construct.sham) return false;
    if (typeof Proxy === "function") return true;

    try {
      Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
      return true;
    } catch (e) {
      return false;
    }
  }

  return function () {
    var Super = _getPrototypeOf(Derived),
        result;

    if (isNativeReflectConstruct()) {
      var NewTarget = _getPrototypeOf(this).constructor;

      result = Reflect.construct(Super, arguments, NewTarget);
    } else {
      result = Super.apply(this, arguments);
    }

    return _possibleConstructorReturn(this, result);
  };
}

import React, { Component } from 'react';
import Spin from '../spin';
import exception from './exception';

var asyncComponent = function asyncComponent(importComponent) {
  var AsyncComponent =
  /*#__PURE__*/
  function (_Component) {
    _inherits(AsyncComponent, _Component);

    var _super = _createSuper(AsyncComponent);

    function AsyncComponent() {
      var _this;

      _classCallCheck(this, AsyncComponent);

      _this = _super.apply(this, arguments);
      _this.state = {};
      return _this;
    }

    _createClass(AsyncComponent, [{
      key: "componentDidMount",
      value: function componentDidMount() {
        var _this2 = this;

        importComponent().then(function (_ref) {
          var component = _ref["default"];

          _this2.setState({
            component: component
          });
        }, exception);
      }
    }, {
      key: "render",
      value: function render() {
        var Cmp = this.state.component;
        return Cmp ? React.createElement(Cmp, _extends({}, this.props)) : React.createElement(Spin, null);
      }
    }]);

    return AsyncComponent;
  }(Component);

  return AsyncComponent;
};

export default asyncComponent;
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