An alert dialog is often used if you want to make sure information comes through to the user.
When an alert dialog pops up, the user will have to click "OK" to proceed.
All of AlertifyJS animation/transition effects are disabled due to user preference that the system minimizes the amount of animation or motion it uses. See prefers-reduced-motionCSS media feature.
onclosing
{Function}
Description: Gets or sets a function to invoke before closing the dialog. A false invocation result will prevent the dialog from closing.
Default:undefined
alertify.alert('Demo').set({ onclosing:function(){ alertify.message('alert is about to close.')}});
