Dropdown/TagBox - Dynamically create new options from user input

[JaneSjs]

Consider dynamic item creation from user input. For example, as it's done for Select2: https://select2.org/tagging.

Source issue: https://github.com/surveyjs/survey-library/issues/5689

[JaneSjs]

+1 T12664 - Dropdown value as text if value not in list https://surveyjs.answerdesk.io/internal/ticket/details/T12664

[JaneSjs]

+2 https://github.com/surveyjs/survey-library/issues/6964

[JaneSjs]

+1 T15375 - How to replicate a Select2 using the JQuery version of SurveyJS https://surveyjs.answerdesk.io/internal/ticket/details/T15375

[JaneSjs]

+1 T16951 - User's answer does not exist in option list - dropdown list question https://surveyjs.answerdesk.io/internal/ticket/details/T16951

Usage Scenario: Dropdown question should display an option even if it is not listed in a choices array.

[andrewtelnov]

• 1 T17815 - enable tagbox to store more than one custom choice https://surveyjs.answerdesk.io/internal/ticket/details/T17815

[andrewtelnov]

• 1 I need it for Presets and it will be better if we use it in our Property Grid instead of text question with dataList property

[JaneSjs]

• T19389 - Get dropdown options in API with "others" for new value https://surveyjs.answerdesk.io/internal/ticket/details/T19389

[masciugo]

we can still hope! this is the only reason I'm still using custom widget... thank you guys

[JaneSjs]

+1 T20547 - Updating params in custom widget https://surveyjs.answerdesk.io/internal/ticket/details/T20547