Angular Data Grid - Infinite Scrolling

To optimize data load times and improve user navigation when binding DataGrid to a large dataset, you can enable infinite scrolling. In this demo, we bind the component to a dataset of 100,000 records.

To enable infinite scrolling, set scrolling.mode to "infinite".

Backend API

<dx-data-grid id="gridContainer" [dataSource]="dataSource" keyExpr="id" [customizeColumns]="customizeColumns" [showBorders]="true" > <dxo-data-grid-load-panel [enabled]="false"></dxo-data-grid-load-panel> <dxo-data-grid-scrolling mode="infinite"></dxo-data-grid-scrolling> <dxo-data-grid-sorting mode="none"></dxo-data-grid-sorting> </dx-data-grid>

import { bootstrapApplication } from '@angular/platform-browser'; import { Component, enableProdMode, provideZoneChangeDetection } from '@angular/core'; import { DxDataGridComponent, DxDataGridModule } from 'devextreme-angular'; import { DataSourceOptions as DataSourceConfig } from 'devextreme-angular/common/data'; import { Service } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: './app.component.html', styleUrls: ['./app.component.css'], providers: [Service], imports: [ DxDataGridModule, ], }) export class AppComponent { dataSource: DataSourceConfig; constructor(service: Service) { this.dataSource = service.generateData(100000); } customizeColumns(columns: DxDataGridComponent['customizeColumns']) { columns[0].width = 70; } } bootstrapApplication(AppComponent, { providers: [ provideZoneChangeDetection({ eventCoalescing: true, runCoalescing: true }), ], });

::ng-deep #gridContainer { height: 440px; }

import { Injectable } from '@angular/core'; export class Employee { id: number; firstName: string; lastName: string; gender: string; birthDate: Date; } const employees: Employee[] = []; const surnames: string[] = [ 'Smith', 'Johnson', 'Brown', 'Taylor', 'Anderson', 'Harris', 'Clark', 'Allen', 'Scott', 'Carter']; const names: string[] = [ 'James', 'John', 'Robert', 'Christopher', 'George', 'Mary', 'Nancy', 'Sandra', 'Michelle', 'Betty']; const gender: string[] = ['Male', 'Female']; let s = 123456789; @Injectable() export class Service { random() { s = (1103515245 * s + 12345) % 2147483647; return s % (10 - 1); } generateData(count: number) { let i: number; const startBirthDate = Date.parse('1/1/1975'); const endBirthDate = Date.parse('1/1/1992'); for (i = 0; i < count; i += 1) { const birthDate = new Date(startBirthDate + Math.floor( this.random() * (endBirthDate - startBirthDate) / 10, )); birthDate.setHours(12); const nameIndex = this.random(); const item = { id: i + 1, firstName: names[nameIndex], lastName: surnames[this.random()], gender: gender[Math.floor(nameIndex / 5)], birthDate, }; employees.push(item); } return employees; } }

<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> <script src="https://cdn.jsdelivr.net/npm/zone.js@0.16.2/bundles/zone.umd.js"></script> <script src="./bundle.js" type="module"></script> </body> </html>

The component initially displays one page of rows. When users scroll to the end of the view, DataGrid loads the next page. Users cannot skip to arbitrary positions within the component's dataset and can only load pages sequentially.

As a result, the Ctrl + End shortcut jumps to the last loaded row and focuses on its last cell. Ctrl + Home jumps to the first row and focuses on its first cell.