rsnext/packages/next/server/optimize-amp.ts

export default async function optimize(
  html: string,
  config: any
): Promise<string> {
  let AmpOptimizer
  try {
    AmpOptimizer = require('next/dist/compiled/@ampproject/toolbox-optimizer')
  } catch (_) {
    return html
  }
  const optimizer = AmpOptimizer.create(config)
  return optimizer.transformHtml(html, config)
}