As I was wondering about the multi-monitor/screen support of javascript i found the follwing stackexchange questions relevant for the topic:

• 2013 - 40k views: window.open() on a multi-monitor/dual-monitor system - where does window pop up?
• 2014 - 10 k views: window.open on second monitor
• 2016 - 42 views: How to show a webpage onto another monitor connected to it on click of a button?
• 2008 - 11 k views: Testing for multiple screens with javascript
• 2017 - ~1k views:

Quite a few of the questions and answers revolve around the missing option of handling multiple screens with javascript. Security and technical reasons are named to account for the non-existence of such a feature.

On the other hand a few thousand views show that there is interest in the topic and people have tried work-arounds for many years.

So i second I want to automate that process so as soon as they load the first address, a second window automatically pops up on the second monitor and fullscreens itself. This is internal only and will be expected behaviour. from the webmasters.stackexchange question and i would like to know what needs to be done to get this feature?

E.g. would the HTML standard have to be changed see e.g. question from 2014 on code project - would the browser vendors have to do something? Would there be a need for a Javascript addition to e.g. What information can we access from the client? And what would be the actions to get a solution up and running?

And by the way - if you think this is off-topic how would I have to change my question so that it won't be closed. I am very serious about this - there is a need behind this that I have seen quite a few times already.

As I was wondering about the multi-monitor/screen support of javascript i found the follwing stackexchange questions relevant for the topic:

• 2013 - 40k views: window.open() on a multi-monitor/dual-monitor system - where does window pop up?
• 2014 - 10 k views: window.open on second monitor
• 2016 - 42 views: How to show a webpage onto another monitor connected to it on click of a button?
• 2008 - 11 k views: Testing for multiple screens with javascript
• 2017 - ~1k views: https://webmasters.stackexchange./questions/103269/auto-open-fullscreen-on-another-monitor

Quite a few of the questions and answers revolve around the missing option of handling multiple screens with javascript. Security and technical reasons are named to account for the non-existence of such a feature.

On the other hand a few thousand views show that there is interest in the topic and people have tried work-arounds for many years.

So i second I want to automate that process so as soon as they load the first address, a second window automatically pops up on the second monitor and fullscreens itself. This is internal only and will be expected behaviour. from the webmasters.stackexchange question and i would like to know what needs to be done to get this feature?

E.g. would the HTML standard have to be changed see e.g. question from 2014 on code project - would the browser vendors have to do something? Would there be a need for a Javascript addition to e.g. What information can we access from the client? And what would be the actions to get a solution up and running?

And by the way - if you think this is off-topic how would I have to change my question so that it won't be closed. I am very serious about this - there is a need behind this that I have seen quite a few times already.

• javascript
• multiple-monitors
• presentation-api

• Just because it's a good question, doesn't mean that it is a good question for stackoverflow... – Jared Smith Commented Jul 31, 2019 at 17:08
• On what stackexchange site would it then be a better fit? – Wolfgang Fahl Commented Jul 31, 2019 at 17:09
• I found e.g. w3/2013/10/tv-workshop/papers/webtv4_submission_19.pdf – Wolfgang Fahl Commented Jul 31, 2019 at 17:44
• 1 How about developers.google./web/updates/2018/04/… – Wolfgang Fahl Commented Jul 31, 2019 at 18:15
• 1 @JaredSmith No, definitely not tc39 mailing list. They only care about features of the programming language. For requests of new web APIs, the WHATWG mailing lists or github repositories are the relevant places. – Bergi Commented Jul 31, 2019 at 19:12

2 Answers 2

Since Version 66 of Chrome it is possible to use the Presentation API There is a W3C Draft for it since 2019-04

The Example at

• https://googlechrome.github.io/samples/presentation-api/

will work in Chrome 66+ and given an error message

ReferenceError: PresentationRequest is not defined (Your browser may not support this feature.)

for other browsers when clicking presentationRequest.start(). On Chrome 66+ a selection dialog appears

and after picking the desired screen is used in full screen mode.

screen.isExtended is true if there are one or more additional displays.

window.getScreenDetails returns an object including an array of screens, with dimensions and position. The left value for your non-primary screen would be what to target to move a new window to that screen.

const doSetup = async () => {
  const screenDetails = await window.getScreenDetails()
  if (screen.isExtended && screenDetails.screens.length > 1) {
    const newChildWindow = window.open(
      url,
      'New Child Window',
      `popup,width=${800},height=${600},left=0,top=0`
    )
    newChildWindow.moveTo(screenDetails.screens[1].left, 0)
  }
}

Very thorough explanation here: https://web.dev/multi-screen-window-placement/