Can async/await be used in constructors?

Question

As the question stated. Will I be allowed to do this:

class MyClass {
    async constructor(){
        return new Promise()
    }
}

Answer 1

You can get a promise from the return value, and await on that:

class User {
  constructor() {
    this.promise = this._init()
  }
  
  async _init() {
    const response = await fetch('https://jsonplaceholder.typicode.com/users')
    const users = await response.json()
    this.user = users[Math.floor(Math.random() * users.length)]
  }
}

(async () {
  const user = new User()
  await user.promise
  return user
})().then(u => {
  $('#result').text(JSON.stringify(u.user, null, 2))
}).catch(err => {
  console.error(err)
})