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Tag Count Limitation

Documentation

You can use the maxDisplayedTags property to limit the number of displayed tags. When the specified limit is exceeded, the tags are combined into a single multi-tag that displays the number of selected items. Use the showMultiTagOnly property to specify whether to display a multi-tag only or other tags as well. You can also use onMultiTagPreparing event handler to customize the multi-tag, as shown in the second example.

Backend API
<div> <div class="dx-fieldset"> <div class="dx-field"> <div class="dx-field-label"> Multi-tag for several items </div> <div class="dx-field-value"> <dx-tag-box [items]="products" [value]="[1, 2, 3, 4]" displayExpr="Name" valueExpr="Id" [showSelectionControls]="true" selectAllMode="allPages" [maxDisplayedTags]="3" [inputAttr]="{ 'aria-label': 'Product' }" ></dx-tag-box> </div> </div> <div class="dx-field"> <div class="dx-field-label"> Multi-tag for all items </div> <div class="dx-field-value"> <dx-tag-box [items]="slicedProducts" [value]="[1, 2, 3, 4, 5]" displayExpr="Name" valueExpr="Id" [showSelectionControls]="true" (onMultiTagPreparing)="onMultiTagPreparing($event)" [maxDisplayedTags]="3" [inputAttr]="{ 'aria-label': 'Product' }" ></dx-tag-box> </div> </div> <div class="dx-field"> <div class="dx-field-label"> Multi-tag with ordinary tags </div> <div class="dx-field-value"> <dx-tag-box [items]="products" [value]="[1, 2, 3, 4, 5, 6, 7]" displayExpr="Name" valueExpr="Id" [showSelectionControls]="true" selectAllMode="allPages" [maxDisplayedTags]="2" [showMultiTagOnly]="false" [inputAttr]="{ 'aria-label': 'Product' }" ></dx-tag-box> </div> </div> </div> </div>
import { Component, NgModule, enableProdMode } from '@angular/core'; import { BrowserModule, BrowserTransferStateModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxTagBoxModule, DxTagBoxTypes } from 'devextreme-angular/ui/tag-box'; import { Product, Service } from './app.service'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', providers: [Service], templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], }) export class AppComponent { products: Product[]; slicedProducts: Product[]; constructor(service: Service) { this.products = service.getProducts(); this.slicedProducts = this.products.slice(0, 5); } onMultiTagPreparing(args: DxTagBoxTypes.MultiTagPreparingEvent) { const selectedItemsLength = args.selectedItems.length; const totalCount = 5; if (selectedItemsLength < totalCount) { args.cancel = true; } else { args.text = `All selected (${selectedItemsLength})`; } } } @NgModule({ imports: [ BrowserModule, BrowserTransferStateModule, DxTagBoxModule, ], declarations: [AppComponent], bootstrap: [AppComponent], }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep .dx-field { margin-bottom: 50px; }
import { Injectable } from '@angular/core'; export class Product { Id: number; Name: string; Price: number; Current_Inventory: number; Backorder: number; Manufacturing: number; Category: string; ImageSrc: string; } const products: Product[] = [{ Id: 1, Name: 'HD Video Player', Price: 330, Current_Inventory: 225, Backorder: 0, Manufacturing: 10, Category: 'Video Players', ImageSrc: '../../../../images/products/1.png', }, { Id: 2, Name: 'SuperHD Video Player', Price: 400, Current_Inventory: 150, Backorder: 0, Manufacturing: 25, Category: 'Video Players', ImageSrc: '../../../../images/products/2.png', }, { Id: 3, Name: 'SuperPlasma 50', Price: 2400, Current_Inventory: 0, Backorder: 0, Manufacturing: 0, Category: 'Televisions', ImageSrc: '../../../../images/products/3.png', }, { Id: 4, Name: 'SuperLED 50', Price: 1600, Current_Inventory: 77, Backorder: 0, Manufacturing: 55, Category: 'Televisions', ImageSrc: '../../../../images/products/4.png', }, { Id: 5, Name: 'SuperLED 42', Price: 1450, Current_Inventory: 445, Backorder: 0, Manufacturing: 0, Category: 'Televisions', ImageSrc: '../../../../images/products/5.png', }, { Id: 6, Name: 'SuperLCD 55', Price: 1350, Current_Inventory: 345, Backorder: 0, Manufacturing: 5, Category: 'Televisions', ImageSrc: '../../../../images/products/6.png', }, { Id: 7, Name: 'SuperLCD 42', Price: 1200, Current_Inventory: 210, Backorder: 0, Manufacturing: 20, Category: 'Televisions', ImageSrc: '../../../../images/products/7.png', }, { Id: 8, Name: 'SuperPlasma 65', Price: 3500, Current_Inventory: 0, Backorder: 0, Manufacturing: 0, Category: 'Televisions', ImageSrc: '../../../../images/products/8.png', }, { Id: 9, Name: 'SuperLCD 70', Price: 4000, Current_Inventory: 95, Backorder: 0, Manufacturing: 5, Category: 'Televisions', ImageSrc: '../../../../images/products/9.png', }, { Id: 10, Name: 'DesktopLED 21', Price: 175, Current_Inventory: null, Backorder: 425, Manufacturing: 75, Category: 'Monitors', ImageSrc: '../../../../images/products/10.png', }, { Id: 12, Name: 'DesktopLCD 21', Price: 170, Current_Inventory: 210, Backorder: 0, Manufacturing: 60, Category: 'Monitors', ImageSrc: '../../../../images/products/12.png', }, { Id: 13, Name: 'DesktopLCD 19', Price: 160, Current_Inventory: 150, Backorder: 0, Manufacturing: 210, Category: 'Monitors', ImageSrc: '../../../../images/products/13.png', }, { Id: 14, Name: 'Projector Plus', Price: 550, Current_Inventory: null, Backorder: 55, Manufacturing: 10, Category: 'Projectors', ImageSrc: '../../../../images/products/14.png', }, { Id: 15, Name: 'Projector PlusHD', Price: 750, Current_Inventory: 110, Backorder: 0, Manufacturing: 90, Category: 'Projectors', ImageSrc: '../../../../images/products/15.png', }, { Id: 16, Name: 'Projector PlusHT', Price: 1050, Current_Inventory: 0, Backorder: 75, Manufacturing: 57, Category: 'Projectors', ImageSrc: '../../../../images/products/16.png', }, { Id: 17, Name: 'ExcelRemote IR', Price: 150, Current_Inventory: 650, Backorder: 0, Manufacturing: 190, Category: 'Automation', ImageSrc: '../../../../images/products/17.png', }, { Id: 18, Name: 'ExcelRemote Bluetooth', Price: 180, Current_Inventory: 310, Backorder: 0, Manufacturing: 0, Category: 'Automation', ImageSrc: '../../../../images/products/18.png', }, { Id: 19, Name: 'ExcelRemote IP', Price: 200, Current_Inventory: 0, Backorder: 325, Manufacturing: 225, Category: 'Automation', ImageSrc: '../../../../images/products/19.png', }, ]; @Injectable() export class Service { getProducts(): Product[] { return products; } }
// 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/ 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, }, }, paths: { 'npm:': 'https://unpkg.com/', }, map: { 'ts': 'npm:plugin-typescript@4.2.4/lib/plugin.js', 'typescript': 'npm:typescript@4.2.4/lib/typescript.js', '@angular/core': 'npm:@angular/core@12.2.17', '@angular/platform-browser': 'npm:@angular/platform-browser@12.2.17', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.17', '@angular/forms': 'npm:@angular/forms@12.2.17', '@angular/common': 'npm:@angular/common@12.2.17', '@angular/compiler': 'npm:@angular/compiler@12.2.17', 'tslib': 'npm:tslib@2.6.2/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', 'devextreme': 'npm:devextreme@23.2.5/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@23.2.5/bundles/dx.all.js', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.6.4/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.5', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.51', 'devextreme-angular': 'npm:devextreme-angular@23.2.5', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.12', '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@2.8.4/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.4/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@3.0.12/inferno/package.json', 'npm:@angular/*/package.json', 'npm:@angular/common@12.2.17/*/package.json', 'npm:rxjs@7.5.3/package.json', 'npm:rxjs@7.5.3/operators/package.json', 'npm:devextreme-angular@23.2.5/*/package.json', 'npm:devextreme-angular@23.2.5/ui/*/package.json', 'npm:devextreme-angular@23.2.5/package.json', 'npm:devexpress-diagram@2.2.5/package.json', 'npm:devexpress-gantt@4.1.51/package.json', ], }; System.config(window.config);
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/23.2.5/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@0.12.0/dist/zone.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>