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Backend API
<div id="scrollview-demo">
<dx-scroll-view
#scrollView
id="scrollview"
[scrollByContent]="scrollByContent"
[scrollByThumb]="scrollByThumb"
[showScrollbar]="scrollbarMode"
[bounceEnabled]="pullDown"
reachBottomText="Updating..."
(onPullDown)="updateTopContent($event)"
(onReachBottom)="updateBottomContent($event)"
>
<div id="scrollview-content" [innerHTML]="content"></div>
</dx-scroll-view>
<div class="options">
<div class="caption">Options</div>
<div class="option">
<span>Show scrollbar:</span>
<dx-select-box
id="show-scrollbar-mode"
[inputAttr]="{ 'aria-label': 'Show Scrollbar Mode' }"
[items]="showScrollbarModes"
valueExpr="value"
displayExpr="text"
[(value)]="scrollbarMode"
>
</dx-select-box>
</div>
<div class="option">
<dx-check-box
text="Update content on the ReachBottom event"
(onValueChanged)="valueChanged($event)"
[value]="true"
>
</dx-check-box>
</div>
<div class="option">
<dx-check-box
text="Update content on the PullDown event"
[(value)]="pullDown"
>
</dx-check-box>
</div>
<div class="option">
<dx-check-box text="Scroll by content" [(value)]="scrollByContent">
</dx-check-box>
</div>
<div class="option">
<dx-check-box text="Scroll by thumb" [(value)]="scrollByThumb">
</dx-check-box>
</div>
</div>
</div>
import {
NgModule, Component, ViewChild, AfterViewInit, enableProdMode,
} from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxSelectBoxModule } from 'devextreme-angular';
import { DxCheckBoxModule, DxCheckBoxTypes } from 'devextreme-angular/ui/check-box';
import { DxScrollViewModule, DxScrollViewComponent, DxScrollViewTypes } from 'devextreme-angular/ui/scroll-view';
import { ScrollbarMode } from 'devextreme-angular/common';
import { Service } from './app.service';
if (!/localhost/.test(document.location.host)) {
enableProdMode();
}
@Component({
selector: 'demo-app',
templateUrl: `app/app.component.html`,
styleUrls: [`app/app.component.css`],
providers: [Service],
preserveWhitespaces: true,
})
export class AppComponent implements AfterViewInit {
@ViewChild(DxScrollViewComponent, { static: false }) scrollView: DxScrollViewComponent;
showScrollbarModes: { text: string, value: ScrollbarMode }[] = [
{
text: 'On Scroll',
value: 'onScroll',
}, {
text: 'On Hover',
value: 'onHover',
}, {
text: 'Always',
value: 'always',
}, {
text: 'Never',
value: 'never',
},
];
content: string;
updateContentTimer: unknown;
scrollByContent = true;
scrollByThumb = true;
scrollbarMode: ScrollbarMode = this.showScrollbarModes[0].value;
pullDown = false;
constructor(service: Service) {
this.content = service.getContent();
}
ngAfterViewInit() {
this.scrollView.instance.option('onReachBottom', this.updateBottomContent);
}
valueChanged = (data: DxCheckBoxTypes.ValueChangedEvent) => {
this.scrollView.instance.option('onReachBottom', data.value ? this.updateBottomContent : null);
};
updateContent = (args: DxScrollViewTypes.PullDownEvent | DxScrollViewTypes.ReachBottomEvent, eventName: string) => {
const updateContentText = `<br /><div>Content has been updated on the ${eventName} event.</div><br />`;
if (this.updateContentTimer) { clearTimeout(this.updateContentTimer as number); }
this.updateContentTimer = setTimeout(() => {
this.content = (eventName == 'PullDown' ? updateContentText + this.content : this.content + updateContentText);
args.component.release(false);
}, 500);
};
updateTopContent = (e: DxScrollViewTypes.PullDownEvent) => {
this.updateContent(e, 'PullDown');
};
updateBottomContent = (e: DxScrollViewTypes.ReachBottomEvent) => {
this.updateContent(e, 'ReachBottom');
};
}
@NgModule({
imports: [
BrowserModule,
DxScrollViewModule,
DxCheckBoxModule,
DxSelectBoxModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
})
export class AppModule {}
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #scrollview-demo {
min-height: 550px;
}
::ng-deep #scrollview {
height: auto;
position: absolute;
top: 0;
bottom: 300px;
padding: 20px;
}
::ng-deep #scrollview-content {
white-space: pre-wrap;
}
.options {
padding: 20px;
background-color: rgba(191, 191, 191, 0.15);
position: absolute;
bottom: 0;
left: 0;
right: 0;
}
.caption {
font-size: 18px;
font-weight: 500;
}
.option {
margin-top: 10px;
}
.option > span {
position: relative;
top: 2px;
margin-right: 10px;
}
::ng-deep .option > .dx-selectbox {
display: inline-block;
vertical-align: middle;
max-width: 340px;
width: 100%;
}
import { Injectable } from '@angular/core';
let content = '';
@Injectable()
export class Service {
getContent() {
for (let i = 0; i < 10; i++) {
content += 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n\n';
}
content += '<br />';
return content;
}
}
// In real applications, you should not transpile code in the browser.
// You can see how to create your own application with Angular and DevExtreme here:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
const componentNames = [
'accordion',
'action-sheet',
'autocomplete',
'bar-gauge',
'box',
'bullet',
'button-group',
'button',
'calendar',
'chart',
'check-box',
'circular-gauge',
'color-box',
'context-menu',
'data-grid',
'date-box',
'date-range-box',
'defer-rendering',
'diagram',
'draggable',
'drawer',
'drop-down-box',
'drop-down-button',
'file-manager',
'file-uploader',
'filter-builder',
'form',
'funnel',
'gallery',
'gantt',
'html-editor',
'linear-gauge',
'list',
'load-indicator',
'load-panel',
'lookup',
'map',
'menu',
'multi-view',
'nested',
'number-box',
'pie-chart',
'pivot-grid-field-chooser',
'pivot-grid',
'polar-chart',
'popover',
'popup',
'progress-bar',
'radio-group',
'range-selector',
'range-slider',
'recurrence-editor',
'resizable',
'responsive-box',
'sankey',
'scheduler',
'scroll-view',
'select-box',
'slider',
'sortable',
'sparkline',
'speed-dial-action',
'splitter',
'switch',
'tab-panel',
'tabs',
'tag-box',
'text-area',
'text-box',
'tile-view',
'toast',
'toolbar',
'tooltip',
'tree-list',
'tree-map',
'tree-view',
'validation-group',
'validation-summary',
'validator',
'vector-map',
];
window.exports = window.exports || {};
window.config = {
transpiler: 'ts',
typescriptOptions: {
module: 'system',
emitDecoratorMetadata: true,
experimentalDecorators: true,
},
meta: {
'typescript': {
'exports': 'ts',
},
'devextreme/time_zone_utils.js': {
'esModule': true,
},
'devextreme/localization.js': {
'esModule': true,
},
'devextreme/viz/palette.js': {
'esModule': true,
},
'@angular/platform-browser-dynamic': {
'esModule': true,
},
'@angular/platform-browser': {
'esModule': true,
},
'@angular/core': {
'esModule': true,
},
'@angular/common': {
'esModule': true,
},
'@angular/common/http': {
'esModule': true,
},
'@angular/compiler': {
'esModule': true,
},
'@angular/animations': {
'esModule': true,
},
'@angular/forms': {
'esModule': true,
},
},
paths: {
'npm:': 'https://unpkg.com/',
'bundles:': '../../../../bundles/',
},
map: {
'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js',
'typescript': 'npm:typescript@4.2.4/lib/typescript.js',
/* @angular */
'@angular/compiler': 'bundles:@angular/compiler.umd.js',
'@angular/platform-browser-dynamic': 'bundles:@angular/platform-browser-dynamic.umd.js',
'@angular/core': 'bundles:@angular/core.umd.js',
'@angular/core/primitives/signals': 'bundles:@angular/core.primitives.signals.umd.js',
'@angular/common': 'bundles:@angular/common.umd.js',
'@angular/common/http': 'bundles:@angular/common-http.umd.js',
'@angular/platform-browser': 'bundles:@angular/platform-browser.umd.js',
'@angular/platform-browser/animations': 'bundles:@angular/platform-browser.umd.js',
'@angular/forms': 'bundles:@angular/forms.umd.js',
/* devextreme */
'devextreme': 'npm:devextreme@24.1.7/cjs',
'@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13',
'devextreme/bundles/dx.all': 'npm:devextreme@24.1.7/bundles/dx.all.js',
'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.2.13',
'devexpress-gantt': 'npm:devexpress-gantt@4.1.56',
/* devextreme-angular umd maps */
'devextreme-angular': 'bundles:devextreme-angular/devextreme-angular.umd.js',
'devextreme-angular/core': 'bundles:devextreme-angular/devextreme-angular-core.umd.js',
'devextreme-angular/http': 'bundles:devextreme-angular/devextreme-angular-http.umd.js',
...componentNames.reduce((acc, name) => {
acc[`devextreme-angular/ui/${name}`] = `bundles:devextreme-angular/devextreme-angular-ui-${name}.umd.js`;
return acc;
}, {}),
'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js',
'tslib': 'npm:tslib@2.6.1/tslib.js',
'rxjs': 'npm:rxjs@7.5.3/dist/bundles/rxjs.umd.js',
'rxjs/operators': 'npm:rxjs@7.5.3/dist/cjs/operators/index.js',
'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js',
// Prettier
'prettier/standalone': 'npm:prettier@2.8.8/standalone.js',
'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js',
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts',
},
'devextreme': {
defaultExtension: 'js',
},
'devextreme/events/utils': {
main: 'index',
},
'devextreme/events': {
main: 'index',
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js',
},
'rxjs': {
defaultExtension: 'js',
},
'rxjs/operators': {
defaultExtension: 'js',
},
},
packageConfigPaths: [
'npm:@devextreme/*/package.json',
'npm:@devextreme/runtime@3.0.13/inferno/package.json',
'npm:rxjs@7.5.3/package.json',
'npm:rxjs@7.5.3/operators/package.json',
'npm:devexpress-diagram@2.2.13/package.json',
'npm:devexpress-gantt@4.1.56/package.json',
],
};
System.config(window.config);
// System.import('@angular/compiler').catch(console.error.bind(console));
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 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/24.1.7/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.6.12/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.13.3/bundles/zone.umd.min.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.13/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import("app").catch(console.error.bind(console));
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<demo-app>Loading...</demo-app>
</div>
</body>
</html>