NgxMatSelect

SearchBox, infinite Scroll and Mobile View are embedded into Angular Material Select Component.
This library was generated for Angular Material to improve select component (mat-select). In this library, I defined a directive for which generate Search box and Mobile View.

Extra Features, after use this directive:

• Searchable (Client Side And Server Side)
• Mobile View in two ways ('FullScreen' | 'BottomSheet')

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

Compatible with Angular SSR (Universal)

See demo in stackblitz

Installation Guide

The first step is adding ngx-mat-select.styles in angular.json

        "styles": [
          "./node_modules/ngx-mat-select/styles/ngx-mat-select.styles.css"
        ],

The second step is adding NgxMatSelectModule into your Module

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

you can define global default configs for root:

NgxMatSelectModule.forRoot({
    maxWidthForMobileView: 600,
    inFirstLoadCallSearcher: true,
    inFirstLoadSearcherValue: '',
    emptyLabel: 'no entry found',
    noMoreResultLabel: 'no more found',
    useInfiniteScroll: false,
    searchBoxPlaceholder: 'please search',
    maximumResultForShow: 40,
    useMobileView: false,
    valueMember: 'key',
    displayMember: 'value',
    mobileViewType: 'FullScreen'
})

or using token (NGX_MAT_SELECT_CONFIGS) in providers:

  providers: [
  {provide: NGX_MAT_SELECT_CONFIGS, useValue: ngxMatSelectConfigs}
  ],

Samples

Client Side Search (BottomSheet View In Mobile)

Template:

  <mat-form-field>
    <mat-select
      ngxMatSelect
      [hasSearchBox]="true"
      [useMobileView]="true"
      mobileViewType="BottomSheet"
      [(ngModel)]="bankValue"
      [multiple]="false"
      name="bank"
      [required]="true"
      [source]="source"
      [displayMember]="'value'"
      [valueMember]="'key'"
      #sf="ngxMatSelect"
    >
      <mat-option [value]="option" *ngFor="let option of sf.filteredSource">
        {{option.value}}
      </mat-option>
    </mat-select>

  </mat-form-field>

component.ts:

export class MyComponent implements OnInit {

  bankValue = {key: 50, value: 'Bank_50'};
  source: any[] = [];

  ngOnInit(): void {
      for (let i = 0; i < 100; i++) {
       this.source.push({value: 'Bank_' + i, key: i})
      }
  }

}

Client Side Search ( FullScreen View In Mobile)

Template:

  <mat-form-field>
    <mat-select
      ngxMatSelect
      [hasSearchBox]="true"
      [useMobileView]="true"
      mobileViewType="FullScreen"
      [(ngModel)]="bankValue"
      [multiple]="true"
      name="bank"
      [required]="true"
      [source]="source"
      [displayMember]="'value'"
      [valueMember]="'key'"
      #sf="ngxMatSelect"
    >
      <mat-option [value]="option" *ngFor="let option of sf.filteredSource">
        {{option.value}}
      </mat-option>
    </mat-select>

  </mat-form-field>

component.ts:

export class MyComponent implements OnInit {
  bankValue = [{key: 10, value: 'Bank_10'},{key: 75, value: 'Bank_75'}];
  source: any[] = [];

  ngOnInit(): void {
      for (let i = 0; i < 100; i++) {
       this.source.push({value: 'Bank_' + i, key: i})
      }
  }

}

Server Side Search Template:

  <mat-form-field>
    <mat-select
      ngxMatSelect
      [lazyLoad]="true"
      [searcher]="bankSearcher.bind(this)"
      [hasSearchBox]="true"
      [useMobileView]="true"
      mobileViewType="FullScreen"
      [(ngModel)]="bankValue"
      [multiple]="true"
      name="bank"
      [required]="true"
      [source]="source"
      [displayMember]="'value'"
      [valueMember]="'key'"
      #sf="ngxMatSelect"
    >
      <mat-option [value]="option" *ngFor="let option of sf.filteredSource">
        {{option.value}}
      </mat-option>
    </mat-select>

  </mat-form-field>

component.ts:

import {Observable} from "rxjs";
import {of} from 'rxjs';

export class MyComponent implements OnInit {
  bankValue = [{key: 10, value: 'Bank_10'},{key: 75, value: 'Bank_75'}];
  source: any[] = [];

  ngOnInit(): void {
      for (let i = 0; i < 100; i++) {
       this.source.push({value: 'Bank_' + i, key: i})
      }
  }

  // server side mock search by 'of Observable'
  bankSearcher = (search: string, pageNumber: number, pageSize: number): Observable<any[]> => {
      return of(this.source.filter(w => w.value.includes(search)));
  }

}

Input Properties

Property	Default Value	Options	Description
emptyLabel	No results found	string	label for no result found after search
searchBoxPlaceholder	Search ...	string	`placeholder` for search box
maximumResultForShow	30	number	For better performance (especially in mobile), you must set maximum record for showing the records
valueMember	id	string	when your value is an object, it must be defined
displayMember	name	string	for searching, it must be defined
maxWidthForMobileView	599.9	number	unit is px
useMobileView	true	boolean	if this value is true and your screen width is less than value of maxWidthForMobileView, 'mat-select' Will be displayed in 'FullScreen' or 'Bottom Sheet'
mobileViewType	'FullScreen' | 'BottomSheet'	string
lazyLoad	false	boolean	for use searcher function, it must be true
source	[]	any[]	Initial source(it can be big data)
filteredSource	[]	any[]	filtered data(you receive filtered records from 'NgxMatSelect' directive)
searcher	(search: string, pageNumber: number, pageSize: number) => Observable<[]>	Function	for use lazy load you must define function that return ObserverOfArray
hasSearchBox	true	boolean
title	null	string
inFirstLoadCallSearcher	false	boolean
inFirstLoadSearcherValue	''	string
useInfiniteScroll	false	boolean