PreserveOnRefresh & Browser related data API for Flow

[pleku]

Epic consisting of subissues for adding API to server side to know more about browser details.

[syampillai]

I'm looking forward to PreserveOnRefresh feature.

Currently, I have a problem with a Flow application viewing from a mobile. The application's main view contains mainly a Grid and the users swipe up and down to scroll the Grid. Chrome (Android) reloads the page when a swipe-up is not handled by the component inside. In the case of the Grid, it handles swipe-up to scroll the Grid but if the Grid's scroll position is already at the top, it will pass that event to the browser and thus, an unwanted reload will happen.

[pleku]

In the case of the Grid, it handles swipe-up to scroll the Grid but if the Grid's scroll position is already at the top, it will pass that event to the browser and thus, an unwanted reload will happen.

Hi @syampillai, I think this is worth an issue in vaadin/vaadin-grid repository. If that happens often for your users in your app, then the default action for that event should be prevented (the refresh). You can try to search if you can catch that event on some else level in the DOM and prevent the default for Android Chrome. Using @PreserveOnRefresh would seem to me a way to just workaround the bad UX.

[heruan]

Hm, this is on the V14 milestone but in V15 project: I really hope it's V14 😄 (at least for the browser data, like the user time-zone)

[pleku]

There is already a low level feature that enabling this* in the latest 2.0 alpha and are looking at how we provide the value for 14.

*It meaning requesting any data from client and reacting to it. Like time zone. Or window.name, which is needed for preserveonrefresh type of reusing existing UI and its components.

[pleku]

Closing this Epic as the following are available in Flow 2.0 (Vaadin 14):

• @PreserveOnRefresh or alternative missing #3522 @PreserveOnRefresh or alternative missing (Flow 2.0.0.beta2)
• Populate info extracted using JS into WebBrowser #3657 Populate info extracted using JS into WebBrowser (Flow 2.0.0.beta1)