ngx 编译无法通过

[victory-wu]

版本
angular8
"echarts": "^4.9.0",
ngx-echarts": "^5.1.2",

方式一:

import echarts from 'echarts';

@NgModule({
  imports: [
    NgxEchartsModule.forRoot({
      echarts: echarts
    })
  ]
})
export class StatisticModule { }

编译后使用浏览器出现错误:
main.642581c9bf05d0fd9d9e.js:2 ERROR Error: Uncaught (in promise): TypeError: Cannot read property 'init' of null
TypeError: Cannot read property 'init' of null

开发模式下能正常使用

方式二:

@NgModule({
  imports: [
    NgxEchartsModule.forRoot({
      echarts: () => import('echarts')    <= line: 26
    })
  ]
})
export class StatisticModule { }

代码无法通过编译

ERROR in Error during template compile of 'StatisticModule'
Function expressions are not supported in decorators in 'ɵ0'
'ɵ0' contains the error at app/statistic/statistic.module.ts(26,16)
Consider changing the function expression into an exported function.