Detect browser page reload

[avetissargsian]

Hi, I was wondering, is it any way to detect browsers page reload?
I’d like to save some level data before it happens.

[Pkeod]

Your best bet is to save periodically and to let the player know to exit to the main menu in the game to ensure the game saves or to press a save button before leaving.

If you are willing to show the user a browser level warning dialog before leaving your game that can be used to prevent closing before saving in some situations. You only want to do that once if you do it at all.

Confirmation before closing of tab/browser

Then you can use this to communicate the event to save

JsToDef - simple way to send messages from JS to Lua

[jstodef] JsToDef Native Extension that makes possible to send messages from JavaScript to Lua in HTML5 build. Setup You can use the JsToDef extension in your own project by adding this project as a Defold library dependency. Open your game.project file and in the dependencies field under project add: https://github.com/AGulev/jstodef/archive/master.zip Or point to the ZIP file of a specific release. API JavaScript side JsToDef.send(message_id, message) Where message_id is a string that …

Using https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload only might work to let the game save without displaying a popup, you would need to test.