promise-unhandled-why.js

promise-unhandled-why.js

start()

async function start () {
  const promises = [
    new Promise((resolve, reject) => setTimeout(reject, 1000)),
    Promise.reject(),
    Promise.reject()
  ]

  for (const a of promises) {
    try {
      await a
    } catch {
      console.log('failed, continuing')
    }
  }
}

And 1 thing, I also noticed.
Your unhandled promise will be gone after 1 sec.
I assumed that after 1 sec, for loop handling them (1 sec for timeout).
So as soon as they got handler, unhandled promise gone.