DevExtreme Angular - DataSource - langParams

Specifies parameters for language-specific sorting and filtering.

Type:

LangParams

Use this property to include language-specific parameters in sorting and filtering operations performed on a client. For example, you can use langParams to make DataSource ignore letters with diacritic symbols. Specify locale and collator options as in the example below:

jQuery
JavaScript
const dataSource = new DevExpress.data.DataSource({
    // ...
    langParams: {
        locale: 'fr',
        collatorOptions: {
            sensitivity: 'accent',
            caseFirst: 'upper'
        }
    }
});
Angular
TypeScript
import DataSource from "devextreme/data/data_source";
// ...
export class AppComponent {
    dataSource: DataSource;
    constructor () {
        this.dataSource = new DataSource({
            // ...
            langParams: {
                locale: 'fr',
                collatorOptions: {
                    sensitivity: 'accent',
                    caseFirst: 'upper'
                }
            }
        });
    }
}
Vue
App.vue
<script>
import DataSource from 'devextreme/data/data_source';

const dataSource = new DataSource({
    // ...
    langParams: {
        locale: 'fr',
        collatorOptions: {
            sensitivity: 'accent',
            caseFirst: 'upper'
        }
    }
});

export default {
    data() {
        return {
            dataSource
        }
    }
}
</script>
React
App.js
// ...
import DataSource from 'devextreme/data/data_source';

const dataSource = new DataSource({
    // ...
    langParams: {
        locale: 'fr',
        collatorOptions: {
            sensitivity: 'accent',
            caseFirst: 'upper'
        }
    }
});

function App() {
    // ...
}
export default App;

collatorOptions

Specifies Intl.Collator options.

Type:

Object

NOTE
If you set sensitivity: 'base', all diacritics are ignored while sorting and filtering.

locale

Specifies the locale whose features affect sorting and filtering.

Type:

String

Refer to the following page to see the list of available locales: IANA Language Subtag Registry.