import React, { Component } from 'react';

import Loading from '../../base/nc_Loading';

/*

* date: 2018/06/28

* asyn load components

* useage: const newcom = asyncComponent(() => import(/ * webpackChunkName: "chunkname" * / 'pages/so/edit'));

*/

export default function asyncComponent(importComponent) {

class AsyncComponent extends Component {

constructor(props) {

super(props);

this.state = {

component: null,

};

}

componentDidMount() {

this.asyncGetComponent();

}

asyncGetComponent = () => {

const self = this;

new Promise((resolve) => {

const asyncCom = importComponent();

resolve(asyncCom);

}).then((asyncCom) => {

const { default: component } = asyncCom;

self.setState({

component,

});

});

}

render() {

const C = this.state.component;

return C ? <C {...this.props} /> : <Loading text="正在加载中..." />;

}

}

return AsyncComponent;

}