This sample demonstrates the custom tag functionalities of the MultiSelect. Type a character(s) in the MultiSelect element that are not present in the dataSource, you can select and tag that custom typed characters as new item from the suggestion list.
The MultiSelect allows the user to add a non-present option to the component value when the allowCustomValue is enabled. While selecting new custom value the customValueSelection event will be triggered.
More information on the custom value feature can be found in the documentation section.