React Lookup - Enable Grouping

The Lookup can organize items in groups. If you use a simple array as a data source, its objects must have the key and items fields.

jQuery
JavaScript
const lookupData = [{
    key: "Mr. John Heart",
    items: ["Google AdWords Strategy", "New Brochures", "Update NDA Agreement"]
}, {
    key: "Mrs. Olivia Peyton",
    items: ["Update Personnel Files", "Non-Compete Agreements", "Give Final Approval for Refunds"]
}, // ... 
];

$(function() {
    $("#lookupContainer").dxLookup({
        dataSource: lookupData,
        grouped: true
    });
});
Angular
HTML
TypeScript
<dx-lookup
    [dataSource]="lookupDataSource"
    [grouped]="true">
</dx-lookup>
import { DxLookupModule } from "devextreme-angular";
// ...
export class AppComponent {
    lookupDataSource = [{
        key: "Mr. John Heart",
        items: ["Google AdWords Strategy", "New Brochures", "Update NDA Agreement"]
    }, {
        key: "Mrs. Olivia Peyton",
        items: ["Update Personnel Files", "Non-Compete Agreements", "Give Final Approval for Refunds"]
    }, // ... 
    ];
}
@NgModule({
    imports: [
        // ...
        DxLookupModule
    ],
    // ...
})
Vue
<template>
    <DxLookup
        :data-source="lookupData"
        :grouped="true"
    />
</template>

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

import { DxLookup } from 'devextreme-vue/lookup';

export default {
    components: {
        DxLookup
    },
    data() {
        return {
            lookupData: [{
                key: 'Mr. John Heart',
                items: ['Google AdWords Strategy', 'New Brochures', 'Update NDA Agreement']
            }, {
                key: 'Mrs. Olivia Peyton',
                items: ['Update Personnel Files', 'Non-Compete Agreements', 'Give Final Approval for Refunds']
            }, // ... 
            ]
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { Lookup } from 'devextreme-react/lookup';

const lookupData = [{
    key: 'Mr. John Heart',
    items: ['Google AdWords Strategy', 'New Brochures', 'Update NDA Agreement']
}, {
    key: 'Mrs. Olivia Peyton',
    items: ['Update Personnel Files', 'Non-Compete Agreements', 'Give Final Approval for Refunds']
}, // ... 
];

class App extends React.Component {
    render() {
        return (
            <Lookup
                dataSource={lookupData}
                grouped={true}
            />
        );
    }
}

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

If you use the DevExtreme DataSource, specify its group property. In both cases, you need to make the Lookup know that its data source is grouped by assigning true to the grouped property.

jQuery
JavaScript
const lookupData = [
    { name: "Amelia", birthYear: 1991, gender: "female" },
    { name: "Benjamin", birthYear: 1983, gender: "male" },
    { name: "Andrew", birthYear: 1991, gender: "male" },
    { name: "Daniela", birthYear: 1983, gender: "female" },
    { name: "Lee", birthYear: 1983, gender: "male" },
    { name: "Betty", birthYear: 1983, gender: "female" }
];

$(function() {
    $("#lookupContainer").dxLookup({
        dataSource: new DevExpress.data.DataSource({ 
            store: lookupData, 
            group: "gender"
        }),
        grouped: true,
        displayExpr: "name",
        valueExpr: "name"
    });
});
Angular
HTML
TypeScript
<dx-lookup
    [dataSource]="lookupDataSource"
    [grouped]="true"
    displayExpr="name"
    valueExpr="name">
</dx-lookup>
import { DxLookupModule } from "devextreme-angular";
import DataSource from "devextreme/data/data_source";
// ...
export class AppComponent {
    data = [
        { name: "Amelia", birthYear: 1991, gender: "female" },
        { name: "Benjamin", birthYear: 1983, gender: "male" },
        { name: "Andrew", birthYear: 1991, gender: "male" },
        { name: "Daniela", birthYear: 1983, gender: "female" },
        { name: "Lee", birthYear: 1983, gender: "male" },
        { name: "Betty", birthYear: 1983, gender: "female" }
    ];
    lookupDataSource = new DataSource({
        store: data, 
        group: "gender"
    });
}
@NgModule({
    imports: [
        // ...
        DxLookupModule
    ],
    // ...
})
Vue
<template>
    <DxLookup
        :data-source="dataSource"
        :grouped="true"
        display-expr="name"
        value-expr="name"
    />
</template>

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

import { DxLookup } from 'devextreme-vue/lookup';
import DataSource from "devextreme/data/data_source";

const lookupData = [
    { name: 'Amelia', birthYear: 1991, gender: 'female' },
    { name: 'Benjamin', birthYear: 1983, gender: 'male' },
    { name: 'Andrew', birthYear: 1991, gender: 'male' },
    { name: 'Daniela', birthYear: 1983, gender: 'female' },
    { name: 'Lee', birthYear: 1983, gender: 'male' },
    { name: 'Betty', birthYear: 1983, gender: 'female' }
];

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

import { Lookup } from 'devextreme-react/lookup';
import DataSource from "devextreme/data/data_source";

const lookupData = [
    { name: 'Amelia', birthYear: 1991, gender: 'female' },
    { name: 'Benjamin', birthYear: 1983, gender: 'male' },
    { name: 'Andrew', birthYear: 1991, gender: 'male' },
    { name: 'Daniela', birthYear: 1983, gender: 'female' },
    { name: 'Lee', birthYear: 1983, gender: 'male' },
    { name: 'Betty', birthYear: 1983, gender: 'female' }
];

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

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

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

export default App;

To customize group headers, specify a groupTemplate. In Angular and Vue, you can declare it in the markup. In React, you can use a rendering function (shown in the code below) or component:

Angular
HTML
TypeScript
<dx-lookup
    [dataSource]="lookupDataSource"
    [grouped]="true"
    groupTemplate="groupTemplate">
    <div *dxTemplate="let group of 'groupTemplate'; let i = index">
        <div>[{{i + 1}}] Assigned: {{group.key}}</div>
    </div>
</dx-lookup>
import { DxLookupModule } from "devextreme-angular";
import DataSource from "devextreme/data/data_source";
// ...
export class AppComponent {
    lookupDataSource = [{
        key: "Mr. John Heart",
        items: ["Google AdWords Strategy", "New Brochures", "Update NDA Agreement"]
    }, {
        key: "Mrs. Olivia Peyton",
        items: ["Update Personnel Files", "Non-Compete Agreements", "Give Final Approval for Refunds"]
    }, // ... 
    ];
}
@NgModule({
    imports: [
        // ...
        DxLookupModule
    ],
    // ...
})
Vue
<template>
    <DxLookup
        :data-source="dataSource"
        :grouped="true"
        group-template="group">
        <template #group="{ data, index }">
            <div>[{{index + 1}}] Assigned: {{data.key}}</div>
        </template>
    </DxLookup>
</template>

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

import { DxLookup } from 'devextreme-vue/lookup';

export default {
    components: {
        DxLookup
    },
    data() {
        return {
            dataSource: [{
                key: "Mr. John Heart",
                items: ["Google AdWords Strategy", "New Brochures", "Update NDA Agreement"]
            }, {
                key: "Mrs. Olivia Peyton",
                items: ["Update Personnel Files", "Non-Compete Agreements", "Give Final Approval for Refunds"]
            }, // ... 
            ]
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { Lookup } from 'devextreme-react/lookup';
import DataSource from "devextreme/data/data_source";

const renderGroup = (data, index) => {
    return (
        <div>[{index + 1}] Assigned: {data.key}</div>
    );
}

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

        this.dataSource = [{
            key: "Mr. John Heart",
            items: ["Google AdWords Strategy", "New Brochures", "Update NDA Agreement"]
        }, {
            key: "Mrs. Olivia Peyton",
            items: ["Update Personnel Files", "Non-Compete Agreements", "Give Final Approval for Refunds"]
        }, // ... 
        ];
    }

    render() {
        return (
            <Lookup
                dataSource={this.dataSource}
                grouped={true}
                groupRender={renderGroup}
            />
        );
    }
}

export default App;

If you use jQuery alone, use DOM manipulation methods to combine the HTML markup for items. To apply this markup, use the itemTemplate callback function as shown in the following code.

JavaScript
const lookupData = [{
    key: "Mr. John Heart",
    items: ["Google AdWords Strategy", "New Brochures", "Update NDA Agreement"]
}, {
    key: "Mrs. Olivia Peyton",
    items: ["Update Personnel Files", "Non-Compete Agreements", "Give Final Approval for Refunds"]
}, // ... 
];

$(function() {
    $("#lookupContainer").dxLookup({
        dataSource: lookupData,
        grouped: true,
        groupTemplate: function (data) {
            return $("<div>Assigned: " + data.key + "</div>");
        }
    });
});
See Also