import it to your module- import { NgXMultiSelectDropdownModule } from "ngx-multi-select-dropdown";

@NgModule({ imports: [NgXMultiSelectDropdownModule} })

In component you want to use ts- options = [ { id: 1, name: "Option1", displayName: "Option 1"

},
{
    id: 2,
    name: "Option2",
    displayName: "Option 2"
}

]

selectedItems = [ { id: 1, name: "Option1", displayName: "Option 1" } ]

html- <multi-select-dropdown [options]="options" [selectedItems]="selectedItems" [displayName]="'displayName'" (onSelect)="select()" (onUnselect)="unSelect()">

options - List of options (Object or simple string)
selectedItems - Selected Items(In case of multi select)
selectedItem -  Keeps Selected Item when Single Selection
enableSearch - Enable or Disable search(By default true);
singleSelection - Enable Single Selection(By default false);
displayName - Name of the attribute to which is keeping the value to show in List(User friendly)(By default 'name')
type - Type of items("Object" or "Simple") <br/>

If you have any suggestion or issues, you are very welcome to post it here -https://github.com/RichaKashyap/ngx-multi-select-dropdown/issues