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 Group Component: It is used for creating groups of options.
Syntax:
<p-dropdown [group]="true"> <ng-template let-group pTemplate="group"> <div class="p-d-flex p-ai-center"> <span>{{group.label}}</span> </div> </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:
<!DOCTYPE html> < html >
< head >
< title >GFG</ title >
< style >
body {
background-color: lightgrey;
height: 550px;
width: 100%;
}
</ style >
</ head >
< body >
< div style = "text-align:center;" >
< h1 style = "color:green;" >
GeeksforGeeks
</ h1 >
< h3 >
A computer science portal for geeks
</ h3 >
< h4 >
Angular PrimeNG Form Dropdown Group Component
</ h4 >
< h5 >Single</ h5 >
< p-dropdown [options]="cities"
[(ngModel)]="selectedCity1"
placeholder = "Select a City" optionLabel = "name"
[showClear]="true"></ p-dropdown >
</ div >
</ body >
</ html >
|
- app.component.ts
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 = 1; i <= 10; i++) {
this .items.push(
{
label: 'GeeksforGeeks ' + 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' },
];
}
} |
- app.module.ts
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:
Example 2: In the below code, we will be using the above syntax to demonstrate the use of Angular PrimeNG Form Dropdown Group Component.
- app.component.html
<!DOCTYPE html> < html >
< head >
< title >GFG</ title >
< style >
body {
background-color: lightgrey;
height: 550px;
width: 100%;
}
</ style >
</ head >
< body >
< div style = "text-align:center;" >
< h1 style = "color:green;" >
GeeksforGeeks
</ h1 >
< h3 >
A computer science portal for geeks
</ h3 >
< h4 >
Angular PrimeNG Form Dropdown Group Component
</ h4 >
< h5 >Grouped</ h5 >
< p-dropdown [options]="groupedCities"
[(ngModel)]="selectedCity3"
placeholder = "Select a City" [group]="true">
< ng-template let-group pTemplate = "group" >
< div class = "p-d-flex p-ai-center" >
< span >{{ group.label }}</ span >
</ div >
</ ng-template >
</ p-dropdown >
</ div >
</ body >
</ html >
|
- app.component.ts
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
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:
Reference: https://www.primefaces.org/primeng/dropdown