MaxListenersExceededWarning when trying to resolve more than 10 URLs

When I invoke code:

const urlsArray = [] // more than 10 items
let imagePromises = []
urlsArray.forEach(item => {
    const imagePath = `./tmp/${item.id}.jpg`
    const captureWebsitePromise = captureWebsite.file(item.url, imagePath, {
      width: 1280,
      height: 800,
      type: "jpeg",
      overwrite: true
    })
    imagePromises.push(captureWebsitePromise)
  }
})
Promise.all(imagePromises).then(function(imageResult) {
})

I have these errors:

(node:9535) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added to [process]. Use emitter.setMaxListeners() to increase limit
(node:9535) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 SIGINT listeners added to [process]. Use emitter.setMaxListeners() to increase limit
(node:9535) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 SIGTERM listeners added to [process]. Use emitter.setMaxListeners() to increase limit
(node:9535) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 SIGHUP listeners added to [process]. Use emitter.setMaxListeners() to increase limit

Do you have an idea how to capture more than 10 pages using your module?

[broeker]

This might not be ideal but after messing around with numerous other approaches, I finally found a very simple solution that will allow me to spin through 50 sites (and presumably more) on a cheap server:

  let offset = 0;
  items.map(item => {
    setTimeout(() => {
    (async () => {
      await captureWebsite.file(item[0], './screenshots/' + item[1] + '.png', options);
    })();
    }, 10000 + offset);
    offset += 10000;
  })

It seems for me the key is to wait 10 seconds between captures to give my server some breathing room. Three seconds was not long enough, I may be able to go lower but 10 seconds and it seems to chug right along with no error.

Note that this code does NOT need the unlimited listeners code i posted above, see here for a good discussion and particularly this comment:

https://stackoverflow.com/a/44446859/11777731

YMMV and if you have stronger server you may not need this but after a few days I can finally set a nightly cron with more than a few sites 😃

[sindresorhus]

Even easier to use p-map with its concurrency option.