import { Component } from '@angular/core';
@Component({
selector: 'my-app',
templateUrl: 'app/app.template.html'
})
export class AppComponent {
columns: any[];
carsLarge: any[];
totalRecords: number;
rows: number = 50;
ngOnInit() {
setTimeout(() => {
this.columns = [
{ key: 'col1', label: 'Column 1' },
{ key: 'col2', label: 'Column 2' },
{ key: 'col3', label: 'Column 3' },
{ key: 'col4', label: 'Column 4' },
];
this.totalRecords = 300;
}, 1000);
}
loadCarsLazy(event: any) {
setTimeout(() => {
let result = [];
for (let i = event.first; i < event.first + event.rows && i < this.totalRecords; i++) {
result.push({ key: i, col1: i, col2: i, col3: i, col4: i })
}
this.carsLarge = result;
}, 1000);
}
rowTrackBy(index, item) {
return item.key;
}
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
// Import PrimeNG modules
import {AccordionModule} from 'primeng/primeng';
import {AutoCompleteModule} from 'primeng/primeng';
import {BreadcrumbModule} from 'primeng/primeng';
import {ButtonModule} from 'primeng/primeng';
import {CalendarModule} from 'primeng/primeng';
import {CarouselModule} from 'primeng/primeng';
import {ChartModule} from 'primeng/primeng';
import {CheckboxModule} from 'primeng/primeng';
import {ChipsModule} from 'primeng/primeng';
import {CodeHighlighterModule} from 'primeng/primeng';
import {ConfirmDialogModule} from 'primeng/primeng';
import {SharedModule} from 'primeng/primeng';
import {ContextMenuModule} from 'primeng/primeng';
import {DataGridModule} from 'primeng/primeng';
import {DataListModule} from 'primeng/primeng';
import {DataScrollerModule} from 'primeng/primeng';
import {DataTableModule} from 'primeng/primeng';
import {DialogModule} from 'primeng/primeng';
import {DragDropModule} from 'primeng/primeng';
import {DropdownModule} from 'primeng/primeng';
import {EditorModule} from 'primeng/primeng';
import {FieldsetModule} from 'primeng/primeng';
import {FileUploadModule} from 'primeng/primeng';
import {GalleriaModule} from 'primeng/primeng';
import {GMapModule} from 'primeng/primeng';
import {GrowlModule} from 'primeng/primeng';
import {InputMaskModule} from 'primeng/primeng';
import {InputSwitchModule} from 'primeng/primeng';
import {InputTextModule} from 'primeng/primeng';
import {InputTextareaModule} from 'primeng/primeng';
import {LightboxModule} from 'primeng/primeng';
import {ListboxModule} from 'primeng/primeng';
import {MegaMenuModule} from 'primeng/primeng';
import {MenuModule} from 'primeng/primeng';
import {MenubarModule} from 'primeng/primeng';
import {MessagesModule} from 'primeng/primeng';
import {MultiSelectModule} from 'primeng/primeng';
import {OrderListModule} from 'primeng/primeng';
import {OverlayPanelModule} from 'primeng/primeng';
import {PaginatorModule} from 'primeng/primeng';
import {PanelModule} from 'primeng/primeng';
import {PanelMenuModule} from 'primeng/primeng';
import {PasswordModule} from 'primeng/primeng';
import {PickListModule} from 'primeng/primeng';
import {ProgressBarModule} from 'primeng/primeng';
import {RadioButtonModule} from 'primeng/primeng';
import {RatingModule} from 'primeng/primeng';
import {ScheduleModule} from 'primeng/primeng';
import {SelectButtonModule} from 'primeng/primeng';
import {SlideMenuModule} from 'primeng/primeng';
import {SliderModule} from 'primeng/primeng';
import {SpinnerModule} from 'primeng/primeng';
import {SplitButtonModule} from 'primeng/primeng';
import {StepsModule} from 'primeng/primeng';
import {TabMenuModule} from 'primeng/primeng';
import {TabViewModule} from 'primeng/primeng';
import {TerminalModule} from 'primeng/primeng';
import {TieredMenuModule} from 'primeng/primeng';
import {ToggleButtonModule} from 'primeng/primeng';
import {ToolbarModule} from 'primeng/primeng';
import {TooltipModule} from 'primeng/primeng';
import {TreeModule} from 'primeng/primeng';
import {TreeTableModule} from 'primeng/primeng';
@NgModule({
imports: [
BrowserModule,
FormsModule,
ReactiveFormsModule,
BrowserAnimationsModule,
AccordionModule,
AutoCompleteModule,
BreadcrumbModule,
ButtonModule,
CalendarModule,
CarouselModule,
ChartModule,
CheckboxModule,
ChipsModule,
CodeHighlighterModule,
ConfirmDialogModule,
SharedModule,
ContextMenuModule,
DataGridModule,
DataListModule,
DataScrollerModule,
DataTableModule,
DialogModule,
DragDropModule,
DropdownModule,
EditorModule,
FieldsetModule,
FileUploadModule,
GalleriaModule,
GMapModule,
GrowlModule,
InputMaskModule,
InputSwitchModule,
InputTextModule,
InputTextareaModule,
LightboxModule,
ListboxModule,
MegaMenuModule,
MenuModule,
MenubarModule,
MessagesModule,
MultiSelectModule,
OrderListModule,
OverlayPanelModule,
PaginatorModule,
PanelModule,
PanelMenuModule,
PasswordModule,
PickListModule,
ProgressBarModule,
RadioButtonModule,
RatingModule,
ScheduleModule,
SelectButtonModule,
SlideMenuModule,
SliderModule,
SpinnerModule,
SplitButtonModule,
StepsModule,
TabMenuModule,
TabViewModule,
TerminalModule,
TieredMenuModule,
ToggleButtonModule,
ToolbarModule,
TooltipModule,
TreeModule,
TreeTableModule ],
declarations: [ AppComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule { }
/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';
const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);
body {
padding: 2em;
font-family: Arial, Helvetica, sans-serif;
}
<!DOCTYPE html>
<html>
<head>
<title>Angular QuickStart</title>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="stylesheet" href="styles.css" />
<!-- PrimeNG style dependencies -->
<link rel="stylesheet" href="https://unpkg.com/primeng@4.2.0/resources/themes/omega/theme.css" />
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" />
<link rel="stylesheet" href="https://unpkg.com/primeng@4.2.0/resources/primeng.min.css" />
<!-- 1. Load libraries -->
<!-- Polyfill for older browsers -->
<script src="https://unpkg.com/core-js/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.8.4?main=browser"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.8"></script>
<script src="https://unpkg.com/systemjs@0.19.39/dist/system.src.js"></script>
<!-- 2. Configure SystemJS -->
<script src="systemjs.config.js"></script>
</head>
<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
<!--
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
-->
</body>
</html>
/**
* WEB ANGULAR VERSION
* (based on systemjs.config.js in angular.io)
* System configuration for Angular samples
* Adjust as necessary for your application needs.
*/
(function (global) {
System.config({
// DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
transpiler: 'ts',
typescriptOptions: {
// Copy of compiler options in standard tsconfig.json
"target": "es5",
"module": "commonjs",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"noImplicitAny": true,
"suppressImplicitAnyIndexErrors": true
},
meta: {
'typescript': {
"exports": "ts"
}
},
paths: {
// paths serve as alias
'npm:': 'https://unpkg.com/'
},
// map tells the System loader where to look for things
map: {
// our app is within the app folder
app: 'app',
// angular bundles
'@angular/animations': 'npm:@angular/animations@4.2.6/bundles/animations.umd.js',
'@angular/animations/browser': 'npm:@angular/animations@4.2.6/bundles/animations-browser.umd.js',
'@angular/core': 'npm:@angular/core@4.2.6/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common@4.2.6/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler@4.2.6/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser@4.2.6/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.2.6/bundles/platform-browser-dynamic.umd.js',
'@angular/platform-browser/animations': 'npm:@angular/platform-browser@4.2.6/bundles/platform-browser-animations.umd.js',
'@angular/http': 'npm:@angular/http@4.2.6/bundles/http.umd.js',
'@angular/router': 'npm:@angular/router@4.2.6/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms@4.2.6/bundles/forms.umd.js',
'@angular/upgrade': 'npm:@angular/upgrade@4.2.6/bundles/upgrade.umd.js',
'@angular/upgrade/static': 'npm:@angular/upgrade@4.2.6/bundles/upgrade-static.umd.js',
// other libraries
'rxjs': 'npm:rxjs',
'angular-in-memory-web-api': 'npm:angular-in-memory-web-api/bundles/in-memory-web-api.umd.js',
'ts': 'npm:plugin-typescript@4.0.10/lib/plugin.js',
'typescript': 'npm:typescript@2.0.3/lib/typescript.js',
'primeng': 'npm:primeng@4.2.1'
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
app: {
main: './main.ts',
defaultExtension: 'ts'
},
rxjs: {
defaultExtension: 'js'
},
primeng: {
defaultExtension: 'js'
}
}
});
if (!global.noBootstrap) { bootstrap(); }
// Bootstrap the `AppModule`(skip the `app/main.ts` that normally does this)
function bootstrap() {
console.log('Auto-bootstrapping');
// Stub out `app/main.ts` so System.import('app') doesn't fail if called in the index.html
System.set(System.normalizeSync('app/main.ts'), System.newModule({ }));
// bootstrap and launch the app (equivalent to standard main.ts)
Promise.all([
System.import('@angular/platform-browser-dynamic'),
getAppModule()
])
.then(function (imports) {
var platform = imports[0];
var app = imports[1];
platform.platformBrowserDynamic().bootstrapModule(app.AppModule);
})
.catch(function(err){ console.error(err); });
}
// Import AppModule or make the default AppModule if there isn't one
// returns a promise for the AppModule
function getAppModule() {
if (global.noAppModule) {
return makeAppModule();
}
return System.import('app/app.module').catch(makeAppModule)
}
function makeAppModule() {
console.log('No AppModule; making a bare-bones, default AppModule');
return Promise.all([
System.import('@angular/core'),
System.import('@angular/platform-browser'),
System.import('app/app.component')
])
.then(function (imports) {
var core = imports[0];
var browser = imports[1];
var appComp = imports[2].AppComponent;
var AppModule = function() {}
AppModule.annotations = [
new core.NgModule({
imports: [ browser.BrowserModule ],
declarations: [ appComp ],
bootstrap: [ appComp ]
})
]
return {AppModule: AppModule};
})
}
})(this);
<h2>PrimeNG DataTable virtual scrolling issue with rowTrackBy</h2>
<p>Scroll down the table using the scroll button. Notice that when the page boundary is hit causing the lazy load, it jumps back up and sometimes jumps back and forth. Also, scrolling up has similar issues.</p>
<p-dataTable [value]="carsLarge" scrollable="true" scrollHeight="600px" [rows]="rows" virtualScroll="virtualScroll" [style]="{'margin-top':'30px'}"
[lazy]="true" [totalRecords]="totalRecords" (onLazyLoad)="loadCarsLazy($event)" selectionMode="multiple" [dataKey]="'key'" [rowTrackBy]="rowTrackBy">
<p-column header="Id">
<ng-template pTemplate="body" let-index="rowIndex">
{{index}}
</ng-template>
</p-column>
<p-column *ngFor="let col of columns" [field]="col.key" [header]="col.label" [style]="{'width':'400px'}">
<ng-template pTemplate="body" let-col let-index="rowIndex" let-doc="rowData">
<span *ngIf="index === doc.key">{{doc[col.field]}}</span>
<span *ngIf="index !== doc.key"></span>
</ng-template>
</p-column>
</p-dataTable>
# PrimeNG Issue Template
Please create a test case and attach the link of the plunkr to your github issue report.