Templates

The plugin uses application elements rather than shipping a CSS framework. Provide default.php, success.php, error.php, warning.php and info.php under templates/element/flash/.

Use the beginner template in each file, or move the shared markup into templates/element/flash/message.php and use this in each typed element:

<?= $this->element('flash/message', ['message' => $message, 'params' => $params]) ?>

The element receives the message and its params array. Check params.escape before outputting raw markup. Your templates decide the styles and accessibility markup.

Select an element from another loaded plugin with the component's plugin option:

$this->Flash->success('Saved.', ['plugin' => 'MyUi']);

This uses MyUi's templates/element/flash/success.php. The message type remains success, so ordering and filtering still work.