beginUpdate()
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 Also
defaultOptions(rule)
Name | Type | Description |
---|---|---|
device | | |
Device parameters. |
options |
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 Resizable UI component in an application executed on the desktop.
jQuery
DevExpress.ui.dxResizable.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Resizable properties } });
Angular
import Resizable, { Properties } from "devextreme/ui/resizable"; // ... export class AppComponent { constructor () { Resizable.defaultOptions<Properties>({ device: { deviceType: "desktop" }, options: { // Here go the Resizable properties } }); } }
Vue
<template> <div> <DxResizable id="resizable1" /> <DxResizable id="resizable2" /> </div> </template> <script> import DxResizable from "devextreme-vue/resizable"; import Resizable from "devextreme/ui/resizable"; Resizable.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Resizable properties } }); export default { components: { DxResizable } } </script>
React
import dxResizable from "devextreme/ui/resizable"; import Resizable from "devextreme-react/resizable"; dxResizable.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Resizable properties } }); export default function App() { return ( <div> <Resizable id="resizable1" /> <Resizable id="resizable2" /> </div> ) }
You can also set rules for multiple device types:
jQuery
const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { DevExpress.ui.dxResizable.defaultOptions({ device: deviceConfig, options: { // Here go the Resizable properties } }); });
Angular
import Resizable, { Properties } from "devextreme/ui/resizable"; // ... export class AppComponent { constructor () { const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { Resizable.defaultOptions<Properties>({ device: deviceConfig, options: { // Here go the Resizable properties } }); }); } }
Vue
<template> <div> <DxResizable /> </div> </template> <script> import DxResizable from "devextreme-vue/resizable"; import Resizable from "devextreme/ui/resizable"; const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { Resizable.defaultOptions({ device: deviceConfig, options: { // Here go the Resizable properties } }); }); export default { components: { DxResizable } } </script>
React
import dxResizable from "devextreme/ui/resizable"; import Resizable from "devextreme-react/resizable"; const devicesConfig = [ { deviceType: 'desktop' }, { deviceType: 'tablet' }, { deviceType: 'phone' }, ]; devicesConfig.forEach(deviceConfig => { dxResizable.defaultOptions({ device: deviceConfig, options: { // Here go the Resizable properties } }); }); export default function App() { return ( <div> <Resizable /> </div> ) }
dispose()
jQuery
After calling this method, remove the DOM element associated with the UI component:
$("#myResizable").dxResizable("dispose"); $("#myResizable").remove();
Angular
Use conditional rendering instead of this method:
<dx-resizable ... *ngIf="condition"> </dx-resizable>
Vue
Use conditional rendering instead of this method:
<template> <DxResizable ... v-if="condition"> </DxResizable> </template> <script> import DxResizable from 'devextreme-vue/resizable'; export default { components: { DxResizable } } </script>
React
Use conditional rendering instead of this method:
import React from 'react'; import Resizable from 'devextreme-react/resizable'; function DxResizable(props) { if (!props.shouldRender) { return null; } return ( <Resizable ... > </Resizable> ); } class App extends React.Component { render() { return ( <DxResizable shouldRender="condition" /> ); } } export default App;
endUpdate()
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 Also
getInstance(element)
getInstance is a static method that the UI component class supports. The following code demonstrates how to get the Resizable instance found in an element with the myResizable
ID:
// Modular approach import Resizable from "devextreme/ui/resizable"; ... let element = document.getElementById("myResizable"); let instance = Resizable.getInstance(element) as Resizable; // Non-modular approach let element = document.getElementById("myResizable"); let instance = DevExpress.ui.dxResizable.getInstance(element);
See Also
on(eventName, eventHandler)
Use this method to subscribe to one of the events listed in the Events section.
See Also
on(events)
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.