DevExtreme React - In the Data Source

Items in the TagBox can be grouped if they are grouped in the data source. The TagBox recognizes a group when it finds an object with the key and items fields. The key is the group header, the items are items that fall into the group. For example, the fruitsVegetables array from the following code produces two groups with three items each. Note that the TagBox needs to be informed that it deals with grouped data, therefore its grouped option is set to true.

jQuery
JavaScript
const fruitsVegetables = [{
    key: "Fruits",
    items: [
        { name: "Apples", count: 10 },
        { name: "Oranges", count: 12 },
        { name: "Lemons", count: 15 }
    ]
}, {
    key: "Vegetables",
    items: [
        { name: "Potatoes", count: 5 },
        { name: "Tomatoes", count: 9 },
        { name: "Turnips", count: 8 }
    ]
}];

$(function() {
    $("#tagBoxContainer").dxTagBox({
        dataSource: fruitsVegetables,
        grouped: true,
        displayExpr: 'name',
        valueExpr: 'count'
    });
});
Angular
HTML
TypeScript
<dx-tag-box
    [dataSource]="fruitsVegetables"
    [grouped]="true"
    displayExpr="name"
    valueExpr="count">
</dx-tag-box>
import { DxTagBoxModule } from "devextreme-angular";
// ...
export class AppComponent {
    fruitsVegetables = [{
        key: "Fruits",
        items: [
            { name: "Apples", count: 10 },
            { name: "Oranges", count: 12 },
            { name: "Lemons", count: 15 }
        ]
    }, {
        key: "Vegetables",
        items: [
            { name: "Potatoes", count: 5 },
            { name: "Tomatoes", count: 9 },
            { name: "Turnips", count: 8 }
        ]
    }];
}
@NgModule({
     imports: [
         // ...
         DxTagBoxModule
     ],
     // ...
 })
Vue
<template>
    <DxTagBox
        :data-source="fruitsVegetables"
        :grouped="true"
        display-expr="name"
        value-expr="count"
    />
</template>

<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { DxTagBox } from 'devextreme-vue/tag-box';

export default {
    components: {
        DxTagBox
    },
    data() {
        return {
            fruitsVegetables: [{
                key: 'Fruits',
                items: [
                    { name: 'Apples', count: 10 },
                    { name: 'Oranges', count: 12 },
                    { name: 'Lemons', count: 15 }
                ]
            }, {
                key: 'Vegetables',
                items: [
                    { name: 'Potatoes', count: 5 },
                    { name: 'Tomatoes', count: 9 },
                    { name: 'Turnips', count: 8 }
                ]
            }]
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { TagBox } from 'devextreme-react/tag-box';

const fruitsVegetables = [{
    key: 'Fruits',
    items: [
        { name: 'Apples', count: 10 },
        { name: 'Oranges', count: 12 },
        { name: 'Lemons', count: 15 }
    ]
}, {
    key: 'Vegetables',
    items: [
        { name: 'Potatoes', count: 5 },
        { name: 'Tomatoes', count: 9 },
        { name: 'Turnips', count: 8 }
    ]
}];

class App extends React.Component {
    render() {
        return (
            <TagBox
                dataSource={fruitsVegetables}
                grouped={true}
                displayExpr="name"
                valueExpr="count"
            />
        );
    }
}

export default App;
NOTE
Only one-level grouping is supported.

If objects in your data source miss the key and items fields, use the map function of the DevExtreme DataSource to create key + items field mappings. You can find more information on the map function in the Data Layer - Item Mapping topic.

jQuery
JavaScript
const fruitsVegetables = [{
    type: "Fruits",
    collection: [
        { name: "Apples", count: 10 },
        { name: "Oranges", count: 12 },
        { name: "Lemons", count: 15 }
    ]
}, {
    type: "Vegetables",
    collection: [
        { name: "Potatoes", count: 5 },
        { name: "Tomatoes", count: 9 },
        { name: "Turnips", count: 8 }
    ]
}];

$(function() {
    $("#tagBoxContainer").dxTagBox({
        dataSource: new DevExpress.data.DataSource({
            store: fruitsVegetables,
            map: function(item) {
                return {
                    key: item.type,
                    items: item.collection
                }
            }
        }),
        grouped: true,
        displayExpr: 'name',
        valueExpr: 'count'
    });
});
Angular
HTML
TypeScript
<dx-tag-box
    [dataSource]="tagBoxDataSource"
    [grouped]="true"
    displayExpr="name"
    valueExpr="count">
</dx-tag-box>
import { DxTagBoxModule } from "devextreme-angular";
import DataSource from "devextreme/data/data_source";
// ...
export class AppComponent {
    fruitsVegetables = [{
        type: "Fruits",
        collection: [
            { name: "Apples", count: 10 },
            { name: "Oranges", count: 12 },
            { name: "Lemons", count: 15 }
        ]
    }, {
        type: "Vegetables",
        collection: [
            { name: "Potatoes", count: 5 },
            { name: "Tomatoes", count: 9 },
            { name: "Turnips", count: 8 }
        ]
    }];
    tagBoxDataSource: DataSource = new DataSource({
        store: this.fruitsVegetables,
        map: function(item) {
            return {
                key: item.type,
                items: item.collection
            }
        }
    });
}
@NgModule({
     imports: [
         // ...
         DxTagBoxModule
     ],
     // ...
 })
Vue
<template>
    <DxTagBox
        :data-source="tagBoxDataSource"
        :grouped="true"
        display-expr="name"
        value-expr="count"
    />
</template>

<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { DxTagBox } from 'devextreme-vue/tag-box';
import DataSource from "devextreme/data/data_source";

const fruitsVegetables = [{
    type: 'Fruits',
    collection: [
        { name: 'Apples', count: 10 },
        { name: 'Oranges', count: 12 },
        { name: 'Lemons', count: 15 }
    ]
}, {
    type: 'Vegetables',
    collection: [
        { name: 'Potatoes', count: 5 },
        { name: 'Tomatoes', count: 9 },
        { name: 'Turnips', count: 8 }
    ]
}];

export default {
    components: {
        DxTagBox
    },
    data() {
        return {
            tagBoxDataSource: new DataSource({
                store: fruitsVegetables,
                map: function(item) {
                    return {
                        key: item.type,
                        items: item.collection
                    }
                }
            })
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { TagBox } from 'devextreme-react/tag-box';
import DataSource from "devextreme/data/data_source";

const fruitsVegetables = [{
    type: 'Fruits',
    collection: [
        { name: 'Apples', count: 10 },
        { name: 'Oranges', count: 12 },
        { name: 'Lemons', count: 15 }
    ]
}, {
    type: 'Vegetables',
    collection: [
        { name: 'Potatoes', count: 5 },
        { name: 'Tomatoes', count: 9 },
        { name: 'Turnips', count: 8 }
    ]
}];

class App extends React.Component {
    constructor(props) {
        super(props);

        this.tagBoxDataStore = new DataSource({
            store: fruitsVegetables,
            map: function(item) {
                return {
                    key: item.type,
                    items: item.collection
                }
            }
        });
    }

    render() {
        return (
            <TagBox
                dataSource={this.tagBoxDataStore}
                grouped={true}
                displayExpr="name"
                valueExpr="count"
            />
        );
    }
}

export default App;

If your data is not grouped at all, you can group it using the group option of the DataSource. See the Data Layer - Grouping topic for details.

jQuery
JavaScript
const fruitsVegetables = [
    { type: "Fruits", name: "Apples", count: 10 },
    { type: "Fruits", name: "Oranges", count: 12 },
    { type: "Fruits", name: "Lemons", count: 15 },
    { type: "Vegetables", name: "Potatoes", count: 5 },
    { type: "Vegetables", name: "Tomatoes", count: 9 },
    { type: "Vegetables", name: "Turnips", count: 8 }
];

$(function() {
    $("#tagBoxContainer").dxTagBox({
        dataSource: new DevExpress.data.DataSource({
            store: fruitsVegetables,
            group: "type"
        }),
        grouped: true,
        displayExpr: 'name',
        valueExpr: 'count'
    });
});
Angular
HTML
TypeScript
<dx-tag-box
    [dataSource]="tagBoxDataSource"
    [grouped]="true"
    displayExpr="name"
    valueExpr="count">
</dx-tag-box>
import { DxTagBoxModule } from "devextreme-angular";
import DataSource from "devextreme/data/data_source";
// ...
export class AppComponent {
    fruitsVegetables = [
        { type: "Fruits", name: "Apples", count: 10 },
        { type: "Fruits", name: "Oranges", count: 12 },
        { type: "Fruits", name: "Lemons", count: 15 },
        { type: "Vegetables", name: "Potatoes", count: 5 },
        { type: "Vegetables", name: "Tomatoes", count: 9 },
        { type: "Vegetables", name: "Turnips", count: 8 }
    ];
    tagBoxDataSource: DataSource = new DataSource({
        store: this.fruitsVegetables,
        group: "type"
    });
}
@NgModule({
     imports: [
         // ...
         DxTagBoxModule
     ],
     // ...
 })
Vue
<template>
    <DxTagBox
        :data-source="dataSource"
        :grouped="true"
        display-expr="name"
        value-expr="count"
    />
</template>

<script>
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { DxTagBox } from 'devextreme-vue/tag-box';
import DataSource from "devextreme/data/data_source";

const fruitsVegetables = [
    { type: 'Fruits', name: 'Apples', count: 10 },
    { type: 'Fruits', name: 'Oranges', count: 12 },
    { type: 'Fruits', name: 'Lemons', count: 15 },
    { type: 'Vegetables', name: 'Potatoes', count: 5 },
    { type: 'Vegetables', name: 'Tomatoes', count: 9 },
    { type: 'Vegetables', name: 'Turnips', count: 8 }
];

export default {
    components: {
        DxTagBox
    },
    data() {
        return {
            dataSource: new DataSource({
                store: fruitsVegetables,
                group: 'type'
            })
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

import { TagBox } from 'devextreme-react/tag-box';
import DataSource from "devextreme/data/data_source";

const fruitsVegetables = [
    { type: 'Fruits', name: 'Apples', count: 10 },
    { type: 'Fruits', name: 'Oranges', count: 12 },
    { type: 'Fruits', name: 'Lemons', count: 15 },
    { type: 'Vegetables', name: 'Potatoes', count: 5 },
    { type: 'Vegetables', name: 'Tomatoes', count: 9 },
    { type: 'Vegetables', name: 'Turnips', count: 8 }
];

class App extends React.Component {
    constructor(props) {
        super(props);

        this.dataSource = new DataSource({
            store: fruitsVegetables,
            group: 'type'
        });
    }

    render() {
        return (
            <TagBox
                dataSource={this.dataSource}
                grouped={true}
                displayExpr="name"
                valueExpr="count"
            />
        );
    }
}

export default App;

View Demo

See Also