asciidoctor-cli-await.js

class Invoker {
  async invoke() {
    // we need to add "await" otherwise "convertFromStdin" will not be completed when we "do something"
    Invoker.convertFromStdin()
  }

  static async convertFromStdin() {
    console.log('>>> convertFromStdin')
    const data = await Invoker.readFromStdin()
    console.log('<<< convertFromStdin', data)
  }

  static async readFromStdin() {
    return new Promise((resolve, reject) => {
      setTimeout(() => {
        resolve('data')
      }, 500)
    })
  }
}

class AsciidoctorRevealJsInvoker extends Invoker {

  async invoke() {
    console.log('>>> super.invoke()')
    await super.invoke()
    console.log('<<< super.invoke()')
    console.log('do something')
  }
}

new AsciidoctorRevealJsInvoker().invoke()

output-with-await.txt

>>> super.invoke()
>>> convertFromStdin
<<< convertFromStdin data
<<< super.invoke()
do something

output.txt

>>> super.invoke()
>>> convertFromStdin
<<< super.invoke()
do something
<<< convertFromStdin data