content: import React from 'react'
  import App from 'next/app'
  
  import { applyPolyfills, defineCustomElements } from 'test-component/loader'
  
  export default class MyApp extends App {
    componentDidMount() {
      applyPolyfills().then(() => {
        defineCustomElements(window)
      })
    }
  
    render() {
      const { Component, pageProps } = this.props
      return <Component {...pageProps} />
    }
  }
  