Valence.app.setPromptBeforeClose()

[mwmayer]

I have a situation where I want to use something like this but not to prompt the user. Rather just call a function to do what I need and then let the app close. So basically I just need to know when the close app event has occurred. Is there something like this available?

[Johnny Major]

Is your application a NAB app or one you wrote manually?

[mwmayer]

Not NAB. Manual.

[Johnny Major]

Example capturing the close of an app:

(function () {
    let processed = false;

    function processClose() {
        if (processed) {
            return;
        }
        processed = true;

        //on close logic
        // FYI :
        // if making a call to the backend, use navigator.sendBeacon()
    }

    window.addEventListener('pagehide', function (event) {
        if (event.persisted) {
            return;
        }
        processClose();
    });
})();