Angular Lookup - Overview

The Lookup is a UI component that allows an end user to search for an item in a collection shown in a drop-down menu.

View Demo

The following code adds the Lookup UI component to your page. The simplest configuration requires only a dataSource to be specified. In addition, you can define the placeholder to be displayed when the Lookup input field is empty.

jQuery
HTML
JavaScript
<div id="lookupContainer"></div>
$(function() {
    $("#lookupContainer").dxLookup({
        dataSource: [
            "HD Video Player",
            "SuperHD Video Player",
            "SuperPlasma 50",
            // ...
        ],
        placeholder: "Select a product..."
    });
});
Angular
HTML
TypeScript
<dx-lookup
    [dataSource]="lookupDataSource"
    placeholder="Select a product...">
</dx-lookup>
import { DxLookupModule } from "devextreme-angular";
// ...
export class AppComponent {
    lookupDataSource = [ "HD Video Player", "SuperHD Video Player", "SuperPlasma 50" ];
}
@NgModule({
    imports: [
        // ...
        DxLookupModule
    ],
    // ...
})
Vue
<template>
    <DxLookup
        :data-source="dataSource"
        placeholder="Select a product..."
    />
</template>

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

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

export default {
    components: {
        DxLookup
    },
    data() {
        return {
            dataSource: [
                'HD Video Player',
                'SuperHD Video Player',
                'SuperPlasma 50',
                // ...
            ]
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

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

const dataSource = [
    'HD Video Player',
    'SuperHD Video Player',
    'SuperPlasma 50',
    // ...
];

class App extends React.Component {
    render() {
        return (
            <Lookup
                dataSource={dataSource}
                placeholder="Select a product..."
            />
        );
    }
}

export default App;

If your data is an array of objects, specify:

  • valueExpr
    The data field whose value will be written into the value property.
  • displayExpr
    The data field whose value will be displayed within the inner List UI component and in the input field of the Lookup.
jQuery
JavaScript
const lookupData = [
    { id: 1, country: "Afghanistan" },
    { id: 2, country: "Albania" },
    // ...
];

$(function() {
    $("#lookupContainer").dxLookup({
        dataSource: lookupData,
        valueExpr: 'id',
        displayExpr: 'country'
    });
});
Angular
HTML
TypeScript
<dx-lookup
    [dataSource]="lookupDataSource"
    valueExpr="id"
    displayExpr="country">
</dx-lookup>
import { DxLookupModule } from "devextreme-angular";
// ...
export class AppComponent {
    lookupDataSource = [
        { id: 1, country: "Afghanistan" },
        { id: 2, country: "Albania" },
        // ...
    ];
}
@NgModule({
    imports: [
        // ...
        DxLookupModule
    ],
    // ...
})
Vue
<template>
    <DxLookup
        :data-source="lookupData"
        value-expr="id"
        display-expr="country"
    />
</template>

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

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

export default {
    components: {
        DxLookup
    },
    data() {
        return {
            lookupData: [
                { id: 1, country: 'Afghanistan' },
                { id: 2, country: 'Albania' },
                // ...
            ]
        };
    }
}
</script>
React
import React from 'react';
import 'devextreme/dist/css/dx.common.css';
import 'devextreme/dist/css/dx.light.css';

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

const lookupData = [
    { id: 1, country: 'Afghanistan' },
    { id: 2, country: 'Albania' },
    // ...
];

class App extends React.Component {
    render() {
        return (
            <Lookup
                dataSource={lookupData}
                valueExpr="id"
                displayExpr="country"
            />
        );
    }
}

export default App;
See Also