function component() {
 return import( /* webpackChunkName: "lodash" */ 'lodash').then(_ => {
  var element = document.createElement('div');
  element.innerHTML = _.join(['Hello', 'webpack'], ' ');
  return element;
 }).catch(error => 'An error occurred while loading the component');
}

// 或者使用async

async function getComponent() {
 var element = document.createElement('div');
 const _ = await import(/* webpackChunkName: "lodash" */ 'lodash');
 element.innerHTML = _.join(['Hello', 'webpack'], ' ');
 return element;
}

require.ensure([], function(require){
  var list = require('./list');
  list.show();
，'list');

<!-- Router -->
const Foo = require.ensure([], () => {
  require("Foo");
}, err => {
  console.error("We failed to load chunk: " + err);
}, "chunk-name");

//react-router2 or 3
<Route path="/foo" getComponent={Foo} />

// webpack 配置文件中 使用lazyload-loader（必须将lazuyload-loader 放置在use的最右侧）

module: {
  rules: [
   {
    test: /\.(js|jsx)$/,,
    use: [
     'babel-loader',
     'lazyload-loader'
    ]
   },

 // 使用lazy! 前缀 代表需要懒加载的Router
 
 import Shop from 'lazy!./src/view/Shop';
 
 // Router 正常使用
 <Route path="/shop" component={Shop} />