Chosen http://harvesthq.github.io/chosen/
Chosen Bootstrap Look & Feel https://github.com/dbtek/chosen-bootstrap (with my style fixes)
The preferred way to install this extension is through composer.
Either run
php composer.phar require "nex/yii2-chosen" "*"
or add
"nex/yii2-chosen" : "*"to the require section of your application's composer.json file.
With a model
<?php
use nex\chosen\Chosen;
?>
<?= Chosen::widget([
'model' => $model,
'attribute' => 'selectable_attr',
'items' => [1 => 'First item', 2 => 'Second item', 3 => 'Third item'],
'multiple' => true,
]);?>
<?= $form->field($model, 'selectable_attr')->widget(
Chosen::className(), [
'items' => [1 => 'First item', 2 => 'Second item', 3 => 'Third item'],
'disableSearch' => 5, // Search input will be disabled while there are fewer than 5 items
'clientOptions' => [
'search_contains' => true,
'single_backstroke_delete' => false,
],
]);?>
Without a model
<?php
use nex\chosen\Chosen;
?>
<?= Chosen::widget([
'name' => 'ChosenTest',
'value' => 3,
'items' => [1 => 'First item', 2 => 'Second item', 3 => 'Third item'],
'allowDeselect' => false,
'disableSearch' => true, // Search input will be disabled
'clientOptions' => [
'search_contains' => true,
'max_selected_options' => 2,
],
]);?>
To override default placeholder strings you can add translated messages for Select an option (single select) and Select some options (multiple select) to your application message file. By default widget will use 'app' category to translate this strings, but you can set your own category by changing translateCategory option in widget configuration. For example, you can write this in application config file:
<?php
\Yii::$container->set('nex\chosen\Chosen', [
'translateCategory' => 'my-app',
]);
Also you can override placeholder text when invoking widget (it can be useful for selects with small width):
<?php
use nex\chosen\Chosen;
?>
<?= Chosen::widget([
'name' => 'ChosenTest',
'value' => 3,
'items' => [1 => 'First item', 2 => 'Second item', 3 => 'Third item'],
'placeholder' => 'Select',
]);?>