This section describes members used to manipulate the UI component.
Postpones rendering that can negatively affect performance until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.
See AlsoGets the UI component's content.
Specifies the device-dependent default configuration properties for this component.
Parameters:The component's default device properties.
Object structure:
Name Type Description device |Device parameters.
When you specify a function, get information about the current device from the argument. Return true if the properties should be applied to the device.
Options to be applied.
defaultOptions is a static method that the UI component class supports. The following code demonstrates how to specify default properties for all instances of the LoadPanel UI component in an application executed on the desktop.
jQueryDevExpress.ui.dxLoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel properties } });Angular
import LoadPanel, { Properties } from "devextreme/ui/load_panel"; // ... export class AppComponent { constructor () { LoadPanel.defaultOptions<Properties>({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel properties } }); } }Vue
<template> <div> <DxLoadPanel id="loadPanel1" /> <DxLoadPanel id="loadPanel2" /> </div> </template> <script> import DxLoadPanel from "devextreme-vue/load-panel"; import LoadPanel from "devextreme/ui/load_panel"; LoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel properties } }); export default { components: { DxLoadPanel } } </script>React
import dxLoadPanel from "devextreme/ui/load_panel"; import LoadPanel from "devextreme-react/load-panel"; dxLoadPanel.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the LoadPanel properties } }); export default function App() { return ( <div> <LoadPanel id="loadPanel1" /> <LoadPanel id="loadPanel2" /> </div> ) }
You can also set rules for multiple device types:
jQueryconst devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { DevExpress.ui.dxLoadPanel.defaultOptions({ device: deviceConfig, options: { // Here go the LoadPanel properties } }); });Angular
import LoadPanel, { Properties } from "devextreme/ui/load_panel"; // ... export class AppComponent { constructor () { const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { LoadPanel.defaultOptions<Properties>({ device: deviceConfig, options: { // Here go the LoadPanel properties } }); }); } }Vue
<template> <div> <DxLoadPanel /> </div> </template> <script> import DxLoadPanel from "devextreme-vue/load-panel"; import LoadPanel from "devextreme/ui/load_panel"; const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { LoadPanel.defaultOptions({ device: deviceConfig, options: { // Here go the LoadPanel properties } }); }); export default { components: { DxLoadPanel } } </script>React
import dxLoadPanel from "devextreme/ui/load_panel"; import LoadPanel from "devextreme-react/load-panel"; const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { dxLoadPanel.defaultOptions({ device: deviceConfig, options: { // Here go the LoadPanel properties } }); }); export default function App() { return ( <div> <LoadPanel /> </div> ) }
Disposes of all the resources allocated to the LoadPanel instance.
jQueryAfter calling this method, remove the DOM element associated with the UI component:
$("#myLoadPanel").dxLoadPanel("dispose"); $("#myLoadPanel").remove();Angular
Use conditional rendering instead of this method:
<dx-load-panel ... *ngIf="condition"> </dx-load-panel>Vue
Use conditional rendering instead of this method:
<template> <DxLoadPanel ... v-if="condition"> </DxLoadPanel> </template> <script> import DxLoadPanel from 'devextreme-vue/load-panel'; export default { components: { DxLoadPanel } } </script>React
Use conditional rendering instead of this method:
import React from 'react'; import LoadPanel from 'devextreme-react/load-panel'; function DxLoadPanel(props) { if (!props.shouldRender) { return null; } return ( <LoadPanel ... > </LoadPanel> ); } class App extends React.Component { render() { return ( <DxLoadPanel shouldRender="condition" /> ); } } export default App;
Gets the root UI component element.
Refreshes the UI component after a call of the beginUpdate() method.
The beginUpdate() and endUpdate() methods reduce the number of renders in cases where extra rendering can negatively affect performance.
See AlsoGets the instance of a UI component found using its DOM node.
Parameters:The UI component's container.
The UI component's instance.
getInstance is a static method that the UI component class supports. The following code demonstrates how to get the LoadPanel instance found in an element with the myLoadPanel
ID:
// Modular approach import LoadPanel from "devextreme/ui/load_panel"; ... let element = document.getElementById("myLoadPanel"); let instance = LoadPanel.getInstance(element) as LoadPanel; // Non-modular approach let element = document.getElementById("myLoadPanel"); let instance = DevExpress.ui.dxLoadPanel.getInstance(element);See Also
Gets the UI component's instance. Use it to access other methods of the UI component.
This UI component's instance.
Detaches all event handlers from a single event.
The object for which this method is called.
Detaches a particular event handler from a single event.
Parameters:The event's name.
The event's handler.
The object for which this method is called.
Subscribes to an event.
Parameters:The event's name.
The event's handler.
The object for which this method is called.
Use this method to subscribe to one of the events listed in the Events section.
See AlsoSubscribes to events.
Parameters:Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}
The object for which this method is called.
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
See AlsoGets the value of a single property.
Parameters:The property's name or full path.
Return Value: any
This property's value.
Updates the value of a single property.
Parameters:The property's name or full path.
optionValue: any
This property's new value.
Updates the values of several properties.
Parameters:Options with their new values.
Recalculates the UI component's size and position without rerendering.
Resets a property to its default value.
Shows or hides the UI component depending on the argument.
Parameters:Specifies whether to show or hide the UI component.
A Promise that is resolved with true if the UI component is shown or false if it is hidden. It is a native Promise or a jQuery.Promise when you use jQuery.
You can use this method instead of the show() and hide() methods. In this case, pass true or false as the method parameter to show or hide the UI component.
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