show method
Shows a neutral toast.
Implementation
void show(String message, {String kind = ''}) {
final classes = kind.isEmpty ? 'toast' : 'toast $kind';
final toast = el('div', classes: classes, role: 'status', text: message);
_host.appendChild(toast);
Timer(ttl, () {
if (toast.parentNode != null) toast.remove();
});
}