It is an independent component like mat-select and a solution for handling SearchBox, VirtualScroll and InfiniteScroll which the Angular material select-box does not support them by it-self.

Extra Advantages that you'll gain more than using mat-select:

• Searchable in the both client and server side modes
• Virtual Scroll in the both client and server side modes as well
• Infinite Scroll in the server side mode

RLT support (use dir='rtl' in html tag)

Documents Online

Customize Online

Source Code Stackblitz

• the first step is to initial ngx-mat-select theme like the other Angular Material Components

  for example add the following line in the styles.scss file:

  @use "ngx-mat-select" as ngxMatSelect; 
   or
  @use "node_modules/ngx-mat-select" as ngxMatSelect; 
  

  then apply your Angular Material Theme to the ngxMatSelect theme

    @include ngxMatSelect.theme($your-theme);
    @include ngxMatSelect.typography($your-typography);
  

  if you want to use dark-theme and light-theme:

    .darkMode {
        ...
        @include ngxMatSelect.theme($your-dark-theme);
    }
  

• The second step is to add NgxMatSelectModule into your Module

  import {NgxMatSelectModule} from "ngx-mat-select";
  ...
  @NgModule({
   imports: [
    ...
    NgxMatSelectModule
    ...
    ]
  })
  

  providers: [
  {
    provide: NGX_MAT_SELECT_CONFIG, 
    useValue: {
              viewType?: NgxMatSelectViewType;
              hasBackButton?: boolean;
              multipleDisplay?: NgxMatSelectMultipleDisplay;
              dataKey?: string;
              optionLabel?: string;
              optionValue?: string;
              panelWidth?: string | number | null;
              overlayPanelClass?: string | string[];
              optionHeight?: number;
              panelHeight?: number;
            }}
  ],