<Page loaded="loaded">
    <FlexboxLayout>
        <StackLayout>
            <Button class="btn btn-primary" text="Test" tap="login" />
        </StackLayout>
    </FlexboxLayout>
</Page>

var dialogsModule = require("tns-core-modules/ui/dialogs");

exports.login = function () {
    dialogsModule.alert("test");
};