Note: This documentation is for an older version of Bootstrap (v.4). (Screen top right, three dots), Expand the region for which you want to turn off Autofill in the Autofill section, If the setting is on, turn it off. If the Bootstrap multiselect dropdown snippet above displays the topics name upon selection, this one keeps it VERY simple with the number choices. Note: To learn more about Select component and see all available options, Rarely used in common scenarios. Moreover, names of up to four appear in the bar but anything more than that, the widget displays a number. field needed to perform a search operation. If you want to toggle mat-select-autocomplete from your own component event, you need to import MultiselectComponent in the component and take its reference as ViewChild element (eg: matSelect). In my case i was using jQuery validation rules with submitHandler function and submitting the data as new FormData(form); Select Option