User has filled out the form and is navigating away without saving. I want a custom alert to display, warning them and asking if they wish to proceed or save.
I searched on here, but the result was from 2007. Gotta be something more modern out there. I've seen them.
I was told that this can only be done using the browser's built in alerts, but I'm sure I've seen custom, nice looking alerts.
Any suggestions where I can find something?