<!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/17.2.4/css/dx.spa.css" />
    <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.4/css/dx.common.css" />
    <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.4/css/dx.light.css" />

    <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
    <script src="https://unpkg.com/zone.js@0.6.25/dist/zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>

    <script src="config.js"></script>
    <script>
        System.import('app')
            .then(function(viz) {
                System.import("devextreme/viz/themes").then(function(viz) {
                    viz.currentTheme("generic.light");
                    viz.refreshTheme();
                });
            })
            .catch(console.error.bind(console));
    </script>

</head>

<body class="dx-viewport">
    <div class="demo-container">
        <demo-app>Loading&hellip;</demo-app>
    </div>
</body>

</html>
// 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://github.com/DevExpress/devextreme-angular/blob/master/README.md

System.config({
    transpiler: 'ts',
    typescriptOptions: {
        module: "commonjs",
        emitDecoratorMetadata: true,
        experimentalDecorators: true
    },
    meta: {
        'typescript': {
            "exports": "ts"
        }
    },
    paths: {
        'npm:': 'https://unpkg.com/'
    },
    map: {
        'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js',
        'typescript': 'npm:typescript@2.2.2/lib/typescript.js',

        '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js',
        '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js',
        '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js',
        '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js',
        '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js',
        '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js',
        '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js',
        '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js',

        'rxjs': 'npm:rxjs@5.3.1',

        'devextreme': 'npm:devextreme@17.2',
        'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js',
        'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
        'devextreme-angular': 'npm:devextreme-angular@17.2'
    },
    packages: {
        'app': {
            main: './app.component.ts',
            defaultExtension: 'ts'
        },
        'devextreme': {
            defaultExtension: 'js'
        },
        'devextreme-angular': {
            main: 'index.js',
            defaultExtension: 'js'
        }
    }
});
<div style="margin-bottom: 10px; padding: 10px; background-color: #e7e7e7;">
    <p style="margin-bottom: 10px;">
        This example demonstrates groupPanel's issue
        about broken drag'n'drop interface in case
        when toolbar "items" option get updated.
    </p>
    <dx-button
        text="Update toolbar items"
        (onClick)="addButton()">
    </dx-button>
</div>
<div style="padding: 10px;">
  <dx-data-grid 
      id="gridContainer"
      [dataSource]="customers"
      [allowColumnReordering]="true"
      (onContentReady)="onContentReady($event)">    
      
      <dxi-column dataField="CompanyName"></dxi-column>
      <dxi-column dataField="Phone"></dxi-column>
      <dxi-column dataField="Fax"></dxi-column>
      <dxi-column dataField="City"></dxi-column>
      <dxi-column dataField="State" [groupIndex]="0"></dxi-column>
  
      <dxo-group-panel [visible]="true"></dxo-group-panel>
  </dx-data-grid>
</div>
import { NgModule, Component, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxButtonModule, DxDataGridModule } from 'devextreme-angular';
import 'devextreme/integration/jquery';

import { Service, Customer } from './app.service';

if(!/localhost/.test(document.location.host)) {
    enableProdMode();
}

@Component({
    selector: 'demo-app',
    templateUrl: 'app/app.component.html',
    providers: [Service]
})
export class AppComponent {
    toolbar: any;
    customers: Customer[];

    constructor(private service: Service) {
        this.customers = service.getCustomers();
    }
    
    addButton() {
        if (!this.toolbar) return;
        
        const toolbarItems = this.toolbar.option('items');
        const customButton = toolbarItems.filter((item) => {
            return item.name === 'customButton';
        });
        
        if (customButton.length) return;
        
        toolbarItems.push({
            location: 'after',
            widget: 'dxButton',
            name: 'customButton',
            options: {
                text: 'Custom Button'
            }
        });
        this.toolbar.option('items', toolbarItems);
        
        // Repaint method dosen't fixes the issue
        // this.toolbar.repaint();
        
        alert(
          "Drag'n'drop just got broken for the groupPanel's items.\n" +
          "Drag some column from the table to get it fixed."
        );
    }
    
    onContentReady(e: any) {
        this.toolbar = e.element.find('.dx-toolbar').dxToolbar('instance');
    }
}

@NgModule({
    imports: [
        BrowserModule,
        DxButtonModule,
        DxDataGridModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

platformBrowserDynamic().bootstrapModule(AppModule);
import { Injectable } from '@angular/core';

export class Customer {
    ID: number;
    CompanyName: string;
    Address: string;
    City: string;
    State: string;
    Zipcode: number;
    Phone: string;
    Fax: string;
    Website: string;
}

let сustomers: Customer[] = [{
    "ID": 1,
    "CompanyName": "Super Mart of the West",
    "Address": "702 SW 8th Street",
    "City": "Bentonville",
    "State": "Arkansas",
    "Zipcode": 72716,
    "Phone": "(800) 555-2797",
    "Fax": "(800) 555-2171",
    "Website": "http://www.nowebsitesupermart.com"
}, {
    "ID": 2,
    "CompanyName": "K&S Music",
    "Address": "1000 Nicllet Mall",
    "City": "Minneapolis",
    "State": "Minnesota",
    "Zipcode": 55403,
    "Phone": "(612) 304-6073",
    "Fax": "(612) 304-6074",
    "Website": "http://www.nowebsitemusic.com"
}, {
    "ID": 3,
    "CompanyName": "Tom's Club",
    "Address": "999 Lake Drive",
    "City": "Issaquah",
    "State": "Washington",
    "Zipcode": 98027,
    "Phone": "(800) 955-2292",
    "Fax": "(800) 955-2293",
    "Website": "http://www.nowebsitetomsclub.com"
}, {
    "ID": 4,
    "CompanyName": "E-Mart",
    "Address": "3333 Beverly Rd",
    "City": "Hoffman Estates",
    "State": "Illinois",
    "Zipcode": 60179,
    "Phone": "(847) 286-2500",
    "Fax": "(847) 286-2501",
    "Website": "http://www.nowebsiteemart.com"
}, {
    "ID": 5,
    "CompanyName": "Walters",
    "Address": "200 Wilmot Rd",
    "City": "Deerfield",
    "State": "Illinois",
    "Zipcode": 60015,
    "Phone": "(847) 940-2500",
    "Fax": "(847) 940-2501",
    "Website": "http://www.nowebsitewalters.com"
}, {
    "ID": 6,
    "CompanyName": "StereoShack",
    "Address": "400 Commerce S",
    "City": "Fort Worth",
    "State": "Texas",
    "Zipcode": 76102,
    "Phone": "(817) 820-0741",
    "Fax": "(817) 820-0742",
    "Website": "http://www.nowebsiteshack.com"
}, {
    "ID": 7,
    "CompanyName": "Circuit Town",
    "Address": "2200 Kensington Court",
    "City": "Oak Brook",
    "State": "Illinois",
    "Zipcode": 60523,
    "Phone": "(800) 955-2929",
    "Fax": "(800) 955-9392",
    "Website": "http://www.nowebsitecircuittown.com"
}, {
    "ID": 8,
    "CompanyName": "Premier Buy",
    "Address": "7601 Penn Avenue South",
    "City": "Richfield",
    "State": "Minnesota",
    "Zipcode": 55423,
    "Phone": "(612) 291-1000",
    "Fax": "(612) 291-2001",
    "Website": "http://www.nowebsitepremierbuy.com"
}, {
    "ID": 9,
    "CompanyName": "ElectrixMax",
    "Address": "263 Shuman Blvd",
    "City": "Naperville",
    "State": "Illinois",
    "Zipcode": 60563,
    "Phone": "(630) 438-7800",
    "Fax": "(630) 438-7801",
    "Website": "http://www.nowebsiteelectrixmax.com"
}, {
    "ID": 10,
    "CompanyName": "Video Emporium",
    "Address": "1201 Elm Street",
    "City": "Dallas",
    "State": "Texas",
    "Zipcode": 75270,
    "Phone": "(214) 854-3000",
    "Fax": "(214) 854-3001",
    "Website": "http://www.nowebsitevideoemporium.com"
}, {
    "ID": 11,
    "CompanyName": "Screen Shop",
    "Address": "1000 Lowes Blvd",
    "City": "Mooresville",
    "State": "North Carolina",
    "Zipcode": 28117,
    "Phone": "(800) 445-6937",
    "Fax": "(800) 445-6938",
    "Website": "http://www.nowebsitescreenshop.com"
}, {
    "ID": 12,
    "CompanyName": "Braeburn",
    "Address": "1 Infinite Loop",
    "City": "Cupertino",
    "State": "California",
    "Zipcode": 95014,
    "Phone": "(408) 996-1010",
    "Fax": "(408) 996-1012",
    "Website": "http://www.nowebsitebraeburn.com"
}, {
    "ID": 13,
    "CompanyName": "PriceCo",
    "Address": "30 Hunter Lane",
    "City": "Camp Hill",
    "State": "Pennsylvania",
    "Zipcode": 17011,
    "Phone": "(717) 761-2633",
    "Fax": "(717) 761-2334",
    "Website": "http://www.nowebsitepriceco.com"
}, {
    "ID": 14,
    "CompanyName": "Ultimate Gadget",
    "Address": "1557 Watson Blvd",
    "City": "Warner Robbins",
    "State": "Georgia",
    "Zipcode": 31093,
    "Phone": "(995) 623-6785",
    "Fax": "(995) 623-6786",
    "Website": "http://www.nowebsiteultimategadget.com"
}, {
    "ID": 15,
    "CompanyName": "Electronics Depot",
    "Address": "2455 Paces Ferry Road NW",
    "City": "Atlanta",
    "State": "Georgia",
    "Zipcode": 30339,
    "Phone": "(800) 595-3232",
    "Fax": "(800) 595-3231",
    "Website": "http://www.nowebsitedepot.com"
}, {
    "ID": 16,
    "CompanyName": "EZ Stop",
    "Address": "618 Michillinda Ave.",
    "City": "Arcadia",
    "State": "California",
    "Zipcode": 91007,
    "Phone": "(626) 265-8632",
    "Fax": "(626) 265-8633",
    "Website": "http://www.nowebsiteezstop.com"
}, {
    "ID": 17,
    "CompanyName": "Clicker",
    "Address": "1100 W. Artesia Blvd.",
    "City": "Compton",
    "State": "California",
    "Zipcode": 90220,
    "Phone": "(310) 884-9000",
    "Fax": "(310) 884-9001",
    "Website": "http://www.nowebsiteclicker.com"
}, {
    "ID": 18,
    "CompanyName": "Store of America",
    "Address": "2401 Utah Ave. South",
    "City": "Seattle",
    "State": "Washington",
    "Zipcode": 98134,
    "Phone": "(206) 447-1575",
    "Fax": "(206) 447-1576",
    "Website": "http://www.nowebsiteamerica.com"
}, {
    "ID": 19,
    "CompanyName": "Zone Toys",
    "Address": "1945 S Cienega Boulevard",
    "City": "Los Angeles",
    "State": "California",
    "Zipcode": 90034,
    "Phone": "(310) 237-5642",
    "Fax": "(310) 237-5643",
    "Website": "http://www.nowebsitezonetoys.com"
}, {
    "ID": 20,
    "CompanyName": "ACME",
    "Address": "2525 E El Segundo Blvd",
    "City": "El Segundo",
    "State": "California",
    "Zipcode": 90245,
    "Phone": "(310) 536-0611",
    "Fax": "(310) 536-0612",
    "Website": "http://www.nowebsiteacme.com"
}];

@Injectable()
export class Service {
    getCustomers() {
        return сustomers;
    }
}