Select2 UI Component for Magento 2
composer require weprovide/magento2-module-select2-uicomponent
bin/magento setup:upgrade
It can be used in any UI Component configuration file.
Example:
VENDOR/MODULE/view/adminhtml/ui_component/cms_page_form.xml
<?xml version="1.0" encoding="UTF-8"?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
<fieldset name="FIELDSET_NAME">
<field name="CUSTOM_FIELD">
<argument name="data" xsi:type="array">
<item name="options" xsi:type="object">VENDOR\MODULE\Model\Config\Source\CUSTOMSOURCE</item>
<item name="config" xsi:type="array">
<item name="dataType" xsi:type="string">text</item>
<item name="label" xsi:type="string" translate="true">CUSTOM FIELD</item>
<item name="formElement" xsi:type="string">select</item>
<item name="source" xsi:type="string">page</item>
<item name="dataScope" xsi:type="string">CUSTOM_FIELD</item>
<item name="elementTmpl" xsi:type="string">WeProvide_Select2UiComponent/form/element/select2</item>
</item>
</argument>
</field>
</fieldset>
</form>