Angular PrimeNG Form Dropdown Advanced with Templating, Filtering and Clear Icon Component

Last Updated : 26 Apr, 2025

Angular PrimeNG is an open-source framework with a rich set of native Angular UI components that are used for great styling and this framework is used to make responsive websites with very much ease. In this article, we will know how to use the calendar component in angular ngx bootstrap.

Dropdown Advanced with Templating, Filtering and Clear Icon Component: This type of dropdown is the advanced one in which we will be using the templating, filtering and clear icons.

Syntax:

<p-dropdown [filter]="true" filterBy="name">
    <ng-template pTemplate="selectedItem">
    </ng-template>
    <ng-template let-country pTemplate="item">
    </ng-template>
</p-dropdown>

Creating Angular Application & Module Installation:

Step 1: Create an Angular application using the following command.

ng new appname

Step 2: After creating your project folder i.e. appname, move to it using the following command.

cd appname

Step 3: Install PrimeNG in your given directory.

npm install primeng --save
npm install primeicons --save

Project Structure:

Example1: In the below code, we will be using the above syntax to demonstrate the use of the Angular PrimeNG Form Dropdown Advanced with Templating, Filtering and Clear Icon Component.

app.component.html

HTML

<div style="text-align:center;">
    <h1 style="color:green;">GeeksforGeeks</h1>
    <h3>A computer science portal for geeks</h3>
    <h4>
        Angular PrimeNG Form Dropdown 
        Advanced with Templating, 
        Filtering and Clear Icon Component
    </h4>
    <h5>Filtering</h5>
    <p-dropdown
        [options]="items"
        [(ngModel)]="item"
        placeholder="Select Item"
        [virtualScroll]="true"
        [itemSize]="31"
        [filter]="false"
    ></p-dropdown>
</div>

app.component.ts

JavaScript

import { Component } from '@angular/core';
import {MenuItem} from 'primeng/api';
import {SelectItem} from 'primeng/api';
import {SelectItemGroup} from 'primeng/api';

interface City {
    name: string,
    code: string
}

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.scss']
})
export class AppComponent { 
    
    cities: City[];
    selectedCity1: City;
    selectedCity2: City;
    selectedCity3: string;
    selectedCountry: string;
    countries: any[];
    groupedCities: SelectItemGroup[];
    items: SelectItem[];
    item: string;

    constructor() {
        this.items = [];
        for (let i = 0; i < 10000; i++) {
            this.items.push({label: 'Item ' + i, value: 'Item ' + i});
        }

        this.cities = [
            {name: 'India', code: 'NY'},
            {name: 'Rome', code: 'RM'},
            {name: 'London', code: 'LDN'},
            {name: 'Istanbul', code: 'IST'},
            {name: 'Paris', code: 'PRS'}
        ];

        this.groupedCities = [
            {
                label: 'India', value: 'IND', 
                items: [
                    {label: 'Mumbai', value: 'Mumbai'},
                    {label: 'Varanasi', value: 'Varanasi'},
                    {label: 'Nashik', value: 'Nashik'},
                    {label: 'Delhi', value: 'Delhi'}
                ]
            },
            {
                label: 'USA', value: 'us', 
                items: [
                    {label: 'Chicago', value: 'Chicago'},
                    {label: 'Los Angeles', value: 'Los Angeles'},
                    {label: 'New York', value: 'New York'},
                    {label: 'San Francisco', value: 'San Francisco'}
                ]
            },
            {
                label: 'Japan', value: 'jp', 
                items: [
                    {label: 'Kyoto', value: 'Kyoto'},
                    {label: 'Osaka', value: 'Osaka'},
                    {label: 'Tokyo', value: 'Tokyo'},
                    {label: 'Yokohama', value: 'Yokohama'}
                ]
            }
        ];

        this.countries = [
            {name: 'Australia', code: 'AU'},
            {name: 'Brazil', code: 'BR'},
            {name: 'China', code: 'CN'},
            {name: 'Egypt', code: 'EG'},
            {name: 'France', code: 'FR'},
            {name: 'Germany', code: 'DE'},
            {name: 'India', code: 'IN'},
            {name: 'Japan', code: 'JP'},
            {name: 'Spain', code: 'ES'},
            {name: 'United States', code: 'US'}
        ];
    }
}

app.module.ts

JavaScript

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { DropdownModule } from 'primeng/dropdown';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        DropdownModule,
        FormsModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})

export class AppModule { }

app.component.scss

:host ::ng-deep .p-dropdown {
    width: 14rem;
}

Output:

Example2: In the below code, we will be using the above syntax to demonstrate the use of the Angular PrimeNG Form Dropdown Advanced with Templating, Filtering, and Clear Icon Component.

app.component.html

HTML

<div style="text-align:center;">
    <h1 style="color:green;">GeeksforGeeks</h1>
    <h3>A computer science portal for geeks</h3>
    <h4>
        Angular PrimeNG Form Dropdown 
        Advanced with Templating, 
        Filtering and Clear Icon Component
    </h4>
    <h5>
        Advanced with Templating, Filtering and Clear Icon
    </h5>
    <p-dropdown
        [options]="countries"
        [(ngModel)]="selectedCountry"
        optionLabel="name"
        [filter]="true"
        filterBy="name"
        [showClear]="true"
        placeholder="Select a Country"
    >
        <ng-template pTemplate="selectedItem">
            <div class="country-item country-item-value" 
                 *ngIf="selectedCountry">
            <div>{{ selectedCountry.name }}</div>
            </div>
        </ng-template>
        <ng-template let-country pTemplate="item">
            <div class="country-item">
            <div>{{ country.name }}</div>
            </div>
        </ng-template>
    </p-dropdown>
</div>

app.component.ts

JavaScript

import { Component } from '@angular/core';
import {MenuItem} from 'primeng/api';
import {SelectItem} from 'primeng/api';
import {SelectItemGroup} from 'primeng/api';

interface City {
    name: string,
    code: string
}

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent { 
    
    cities: City[];
    selectedCity1: City;
    selectedCity2: City;
    selectedCity3: string;
    selectedCountry: string;
    countries: any[];
    groupedCities: SelectItemGroup[];
    items: SelectItem[];
    item: string;

    constructor() {
        this.items = [];
        for (let i = 0; i < 10000; i++) {
            this.items.push({label: 'Item ' + i, value: 'Item ' + i});
        }

        this.cities = [
            {name: 'India', code: 'NY'},
            {name: 'Rome', code: 'RM'},
            {name: 'London', code: 'LDN'},
            {name: 'Istanbul', code: 'IST'},
            {name: 'Paris', code: 'PRS'}
        ];

        this.groupedCities = [
            {
                label: 'India', value: 'IND', 
                items: [
                    {label: 'Mumbai', value: 'Mumbai'},
                    {label: 'Varanasi', value: 'Varanasi'},
                    {label: 'Nashik', value: 'Nashik'},
                    {label: 'Delhi', value: 'Delhi'}
                ]
            },
            {
                label: 'USA', value: 'us', 
                items: [
                    {label: 'Chicago', value: 'Chicago'},
                    {label: 'Los Angeles', value: 'Los Angeles'},
                    {label: 'New York', value: 'New York'},
                    {label: 'San Francisco', value: 'San Francisco'}
                ]
            },
            {
                label: 'Japan', value: 'jp', 
                items: [
                    {label: 'Kyoto', value: 'Kyoto'},
                    {label: 'Osaka', value: 'Osaka'},
                    {label: 'Tokyo', value: 'Tokyo'},
                    {label: 'Yokohama', value: 'Yokohama'}
                ]
            }
        ];

        this.countries = [
            {name: 'Australia', code: 'AU'},
            {name: 'Brazil', code: 'BR'},
            {name: 'China', code: 'CN'},
            {name: 'Egypt', code: 'EG'},
            {name: 'France', code: 'FR'},
            {name: 'Germany', code: 'DE'},
            {name: 'India', code: 'IN'},
            {name: 'Japan', code: 'JP'},
            {name: 'Spain', code: 'ES'},
            {name: 'United States', code: 'US'}
        ];
    }
}

app.module.ts

Code block

app.component.scss

:host ::ng-deep .p-dropdown {
    width: 14rem;
}

Output:

Angular PrimeNG Form Dropdown Virtual Scroll Component

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Article Tags :

Angular PrimeNG Form Dropdown Advanced with Templating, Filtering and Clear Icon Component

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