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Data Layer

Guides

(error.message); }); Query Concept Besides DataSource and Stores, DevExtreme data layer has one more useful concept named Query. Query is an abstract chainable interface which provides functionality to evaluate data queries. There are several implementations of this interface, and they are used internally in some Stores as part of the load() method. While Query is considered internal instrument, one

DevExtreme Modules Structure

Guides

").keyConverters; // ===== or ===== import { keyConverters } from "devextreme/data/odata/utils"; query Exposes a data query interface object. Exports: default - The Query interface object. Coderequire("data/query"); // ===== or ===== import Query from "devextreme/data/query"; utils Exposes utility objects provided by the DevExtreme data layer. Exports: base64_encode - The base64_encode method

Component Configuration Syntax

Guides

several property changes, wrap them with the beginUpdate() and endUpdate() method calls. This prevents the UI component from being unnecessarily refreshed and from events being raised. Use an object... pass an object to the option(options) method or to the jQuery plugin at runtime as shown in the previous code, properties specified in this object will be merged with the properties that were specified

Item Deletion

Guides

property. NOTE If you use a remote data source, the List itself does not delete items from it; it only makes a query to it. It is the data source that is responsible for this query to be correctly processed... was actually deleted from the data source. jQuery If you are going to change the event handlers at runtime, or if you need to attach several handlers to a single event, subscribe to the events using

Getting Started with TreeList

Guides

jQuery NOTE Before you start the tutorial, ensure DevExtreme is installed in your application. Angular NOTE Before you start the tutorial, ensure DevExtreme is installed in your...