超薄的PHP。 在特定路线上触发引导模态

Question

Im setting up this site using the slim 3 framework for routing. When a certain url is requested i want a modal to popup, but not the whole app to re render its current view.

For example, when this below is done i instead want to init the modal.

Route:

$app->get('', function() {
    return new SettingsController('settings/index.twig');
});