How in Yii2 Select2 to display predefined options in select before calling AJAX search?

Question

Yii

Hello.
There was a question concerning Yii2 and Select2+AJAX. I looked at the documentation, I didn’t find anything similar, and I don’t really want to do crutches.

How can I substitute predefined options in the select before calling the Select2 lookup AJAX?

Suppose we display cities in the view. There are 5k+ in the database.
It is necessary to display several large cities before searching for a city and then replace them with search results if we enter letters in the field.

Answer 1

Should have been added to 'pluginOptions' => 'tokenSeparators' => [',', ' '],