public function clientValidateAttribute($model, $attribute, $view)
{
if ($this->filter !== 'trim') {
return null;
}
$options = [];
if ($this->skipOnEmpty) {
$options['skipOnEmpty'] = 1;
}
ValidationAsset::register($view);
return 'value = yii.validation.trim($form, attribute, ' . json_encode($options, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE) . ');';
}