The multi selection combo box is a type of combo box control with multiple item selection and auto suggestion capabilities. When you type a character into the text area, the control performs a search operation and suggest a list of possible matching results to select.
Multi selection combo box enables users to group its drop-down items based on its initial character.
Each selected item from its drop-down list will be displayed like a tag with a remove button in the text area.
Selected items will be displayed in text area each separated with delimiter character.
On typing a character each time, the drop-down list will be populated with appropriate items based on text input.
Users are able to select multiple items from the drop-down list.