How to set default parameters for a widget in Yii2

To set default parameters for a widget in Yii2, you need to use the dependency injection container.

Example with DatePicker:

Yii::$container -> set('yiijuiDatePicker', [
	'language' => 'en-US',
]);

The first parameter in set is the class name, and the second is the array of parameters to configure. This way, we can preconfigure our widget properly from the start.