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Angular PrimeNG Table VirtualScroll

Last Updated : 29 Sep, 2022
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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 see how to use the Table VirtualScroll in Angular PrimeNG.

Angular PrimeNG Table VirtualScroll is used to enable virtual scroll in the Table component. VirtualScroller is an efficient approach to handling data effectively.

Syntax:

<p-table 
    [virtualScroll]="true" 
    [virtualRowHeight]="..">
</p-table>
 

Creating Angular application & Module Installation:

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

ng new appname

Step 2:  After completing 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: It will look like the following:

Project Structure

Example 1: Below is a simple example demonstrating the use of the Angular PrimeNG Table VirtualScroll.

app.component.html 
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG Table VirtualScroll</h4>

<p-table 
    [value]="tableData" 
    [scrollable]="true" 
    scrollHeight="400px" 
    [virtualScroll]="true" 
    [virtualRowHeight]="70">
    
    <ng-template pTemplate="header">
        <tr>
            <th>First Name</th>
            <th>Last Name</th>
            <th>Age</th>
        </tr>
    </ng-template>

    <ng-template pTemplate="body" let-people>
        <tr>
            <td>
                {{ people.firstname }}
            </td>
            <td>
                {{ people.lastname }}
            </td>
            <td>
                {{ people.age }}
            </td>
        </tr>
    </ng-template>
</p-table>
app.component.ts 
import { Component } from '@angular/core';

interface People {
    firstname?: string;
    lastname?: string;
    age?: string;
}

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})
export class AppComponent {
    tableData: People[] = [];
    cols: any[] = [];

    ngOnInit() {
        this.cols = [
            { field: 'firstname', header: 'First Name' },
            { field: 'lastname', header: 'Last Name' },
            { field: 'age', header: 'Age' },
        ];
        this.tableData = [
            {
                firstname: 'David',
                lastname: 'ace',
                age: '10',
            },
            {
                firstname: 'AJne',
                lastname: 'west',
                age: '11',
            },
            {
                firstname: 'Mak',
                lastname: 'Lame',
                age: '12',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '13',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '14',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '14',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '15',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '16',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '17',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '18',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '18',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '19',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '20',
            },
        ];
    }
}
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 { TableModule } from 'primeng/table';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TableModule,
        FormsModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
})
export class AppModule { }

Output:

 

Example 2: Below is another example demonstrating the use of the Angular PrimeNG Table VirtualScroll. In this example, we are increasing the virtualRowHeight to 120.

app.component.html 
<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG Table VirtualScroll</h4>

<p-table 
    [value]="tableData" 
    [scrollable]="true" 
    scrollHeight="400px" 
    [virtualScroll]="true" 
    [virtualRowHeight]="120">
    
    <ng-template pTemplate="header">
        <tr>
            <th>First Name</th>
            <th>Last Name</th>
            <th>Age</th>
        </tr>
    </ng-template>

    <ng-template pTemplate="body" let-people>
        <tr>
            <td>
                {{ people.firstname }}
            </td>
            <td>
                {{ people.lastname }}
            </td>
            <td>
                {{ people.age }}
            </td>
        </tr>
    </ng-template>
</p-table>
app.component.ts 
import { Component } from '@angular/core';

interface People {
    firstname?: string;
    lastname?: string;
    age?: string;
}

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})
export class AppComponent {
    tableData: People[] = [];
    cols: any[] = [];
    
    ngOnInit() {
        this.cols = [
            { field: 'firstname', header: 'First Name' },
            { field: 'lastname', header: 'Last Name' },
            { field: 'age', header: 'Age' },
        ];
        this.tableData = [
            {
                firstname: 'David',
                lastname: 'ace',
                age: '10',
            },
            {
                firstname: 'AJne',
                lastname: 'west',
                age: '11',
            },
            {
                firstname: 'Mak',
                lastname: 'Lame',
                age: '12',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '13',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '14',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '14',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '15',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '16',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '17',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '18',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '18',
            },
            {
                firstname: 'Peter',
                lastname: 'raw',
                age: '19',
            },
            {
                firstname: 'Kane',
                lastname: 'James',
                age: '20',
            },
        ];
    }
}
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 { TableModule } from 'primeng/table';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TableModule,
        FormsModule,
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
})
export class AppModule { }

Output:

 

Reference: https://primefaces.org/primeng/table/virtualscroll


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