The application is configured to be run as Hosted Web App. So the app itself is served from an URL, and each time there are internet issues, the msapp-error.html is triggered, and in order to continue using the app, we are forced to restart it, so that it will connect to the URL again and extract the resources to run it on Xbox. QUESTION : Is there any API or configuration that we can set up so that we can trigger the app restart by clicking a button (added by us)? Or even better to automatically reload if the internet connection is back?

Hello, Welcome to Microsoft Q&A! Is there any API or configuration that we can set up so that we can trigger the app restart by clicking a button (added by us)? Yes, there is an API that you could use. With the Fall Creators Update (1709), a new method on WebUIApplication called RequestRestart() is add. This API could programatically restart the app. Please note that you need the 16299 SDK (or later) to access this API. Windows.UI.WebUI.WebUIApplication.requestRestartAsync("Restart") Thank you. If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Unable to reload the app programatically on Javascript UWP app.

Accepted answer

Roy Li - MSFT 33,591 Reputation points Microsoft Vendor

2022-10-03T02:20:58.41+00:00
Hello,

Welcome to Microsoft Q&A!

Is there any API or configuration that we can set up so that we can trigger the app restart by clicking a button (added by us)?

Yes, there is an API that you could use. With the Fall Creators Update (1709), a new method on WebUIApplication called RequestRestart() is add. This API could programatically restart the app. Please note that you need the 16299 SDK (or later) to access this API.

Windows.UI.WebUI.WebUIApplication.requestRestartAsync("Restart")

Thank you.

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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Dorin 21 Reputation points

2022-10-03T09:22:24.163+00:00

We have UWP with JavaScript and we tried the current API - but it doesn't work.

Here is what we've tried - Windows.ApplicationModel.Core.RequestRestartAsync("Restart");

also instead of RequestRestartAsync, we've used requestRestartAsync, but it also didn't work.

Please help us with how to use this method properly.

Roy Li - MSFT 33,591 Reputation points Microsoft Vendor

2022-10-03T09:31:57.793+00:00

I'm not familiar with JavaScript. But I think you need to use the CoreApplication Class to call the RequestRestartAsync() method. Windows.ApplicationModel.Core is just a Namespace. So something like this:

AppRestartFailureReason result = await Windows.ApplicationModel.Core.CoreApplication.RequestRestartAsync("Restart");

Dorin 21 Reputation points

2022-10-04T07:45:55.243+00:00

This also didn't work unfortunately, it says there is no CoreApplication in Core, even though the namespace exists (Windows.ApplicationModel.Core is a valid object).

The WinRT SDK is newer than the required one, so the only unclear detail is how to be sure we are running from the UI thread (I suppose it's also our case - considering we call this API from msapp-error.js).

What can we do next?

Roy Li - MSFT 33,591 Reputation points Microsoft Vendor

2022-10-04T09:18:52.347+00:00

What's the target version and min version of your JavaScript app ? This might be related to that the API is not available for old SDK.

Dorin 21 Reputation points

2022-10-04T10:41:32.633+00:00

PWA is still not available for Xbox. :(

Current target version - 10.0.17763.0
Min version - 10.0.17763.0
Target platform - Universal Windows

Roy Li - MSFT 33,591 Reputation points Microsoft Vendor

2022-10-05T03:17:27.523+00:00

I find another way to call the function which should work in a JS app. Please take a look at WebUIApplication.RequestRestartAsync() You could try the following code:

Windows.UI.WebUI.WebUIApplication.requestRestartAsync("Restart")

Besides, are you running your app on Xbox ? The UWP tag is for desktop only. There are limitations on Xbox and some functions are not allowed to use in Xbox.

Dorin 21 Reputation points

2022-10-05T08:04:34.49+00:00

This one works, thank you very much. Is there any method to do the same but without showing again Splashscreen - only to reconnect to the Hosted app. (ideally showing a loading indicator)

Thank you in advance.

Roy Li - MSFT 33,591 Reputation points Microsoft Vendor

2022-10-05T08:17:17.61+00:00

@Dorin No, there is no API could skip the Splashscreen when restarting the app.

Roy Li - MSFT 33,591 Reputation points Microsoft Vendor

2022-10-05T08:17:32.097+00:00

@Dorin I've updated my answer with the WebUIApplication.RequestRestartAsync() . You could accept it since it works for you. This could also help others who are facing the same issue.
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Unable to reload the app programatically on Javascript UWP app.

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