DevExtreme jQuery - EndpointSelector Methods

var endpointSelector = new DevExpress.data.EndpointSelector({
    db1: {
        local: "http://localhost:55555/service1.svc/",
        production: "http://services.example.com/service1.svc/"
    },
    db2: {
        local: "http://localhost:55555/service2.svc/",
        production: "http://services.example.com/service2.svc/"
    }
});

// Logs http://localhost:55555/service1.svc/ or http://services.example.com/service1.svc/
// depending on whether the app's local or deployed version is running 
console.log(endpointSelector.urlFor("db1"));

import EndpointSelector from "devextreme/data/endpoint_selector";
// ...
export class AppComponent {
    endpointSelector: EndpointSelector;
    constructor() {
        this.endpointSelector = new EndpointSelector({
            db1: {
                local: "http://localhost:55555/service1.svc/",
                production: "http://services.example.com/service1.svc/"
            },
            db2: {
                local: "http://localhost:55555/service2.svc/",
                production: "http://services.example.com/service2.svc/"
            }
        });

        // Logs http://localhost:55555/service1.svc/ or http://services.example.com/service1.svc/
        // depending on whether the app's local or deployed version is running 
        console.log(this.endpointSelector.urlFor("db1")); 
    }
}

<script>
import EndpointSelector from 'devextreme/data/endpoint_selector';

const endpointSelector = new EndpointSelector({
    db1: {
        local: 'http://localhost:55555/service1.svc/',
        production: 'http://services.example.com/service1.svc/'
    },
    db2: {
        local: 'http://localhost:55555/service2.svc/',
        production: 'http://services.example.com/service2.svc/'
    },
    // ...
});

export default {
    mounted() {
        // Logs http://localhost:55555/service1.svc/ or http://services.example.com/service1.svc/
        // depending on whether the app's local or deployed version is running 
        console.log(endpointSelector.urlFor('db1')); 
    },
    // ...
}
</script>

// ...
import EndpointSelector from 'devextreme/data/endpoint_selector';

const endpointSelector = new EndpointSelector({
    db1: {
        local: 'http://localhost:55555/service1.svc/',
        production: 'http://services.example.com/service1.svc/'
    },
    db2: {
        local: 'http://localhost:55555/service2.svc/',
        production: 'http://services.example.com/service2.svc/'
    },
    // ...
});

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

        // Logs http://localhost:55555/service1.svc/ or http://services.example.com/service1.svc/
        // depending on whether the app's local or deployed version is running 
        console.log(endpointSelector.urlFor('db1')); 
    }
}
export default App;