React Lookup Methods
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beginUpdate()
Prevents the widget from refreshing until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods prevent the widget from excessive updates when you are changing multiple widget settings at once. After the beginUpdate() method is called, the widget does not update its UI until the endUpdate() method is called.
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blur()
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close()
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content()
An HTML element or a jQuery element when you use jQuery.
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defaultOptions(rule)
defaultOptions is a static method that the widget class supports. The following code demonstrates how to specify default options for all instances of the Lookup widget in an application executed on the desktop.
jQuery
DevExpress.ui.dxLookup.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Lookup options } });
Angular
import Lookup from "devextreme/ui/lookup"; // ... export class AppComponent { constructor () { Lookup.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Lookup options } }); } }
Vue
<template> <div> <DxLookup id="lookup1" /> <DxLookup id="lookup2" /> </div> </template> <script> import DxLookup from "devextreme-vue/lookup"; import Lookup from "devextreme/ui/lookup"; Lookup.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Lookup options } }); export default { components: { DxLookup } } </script>
React
import React from "react"; import dxLookup from "devextreme/ui/lookup"; import Lookup from "devextreme-react/lookup"; class App extends React.Component { render () { dxLookup.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the Lookup options } }) return ( <div> <Lookup id="lookup1" /> <Lookup id="lookup2" /> </div> ) } } export default App;
dispose()
After calling this method, remove the DOM element associated with the widget:
jQuery
$("#myLookup").dxLookup("dispose"); $("#myLookup").remove();
Angular
<dx-lookup #lookupVar id="myLookup"></dx-lookup>
import { ..., ViewChild } from "@angular/core"; import { DxLookupComponent } from "devextreme-angular"; // ... export class AppComponent { @ViewChild("lookupVar", { static: false }) lookup: DxLookupComponent; // Prior to Angular 8 // @ViewChild("lookupVar") lookup: DxLookupComponent; removeLookup (e) { this.lookup.instance.dispose(); document.getElementById("myLookup").remove(); } }
element()
An HTML element or a jQuery element when you use jQuery.
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endUpdate()
Refreshes the widget after a call of the beginUpdate() method.
Main article: beginUpdate()
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field()
An HTML element or a jQuery element when you use jQuery.
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focus()
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getDataSource()
Gets the DataSource instance.
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- Data Layer - Overview
- Data Layer - DataSource Examples
getInstance(element)
getInstance is a static method that the widget class supports. The following code demonstrates how to get the Lookup instance found in an element with the myLookup
ID:
// Modular approach import Lookup from "devextreme/ui/lookup"; ... let element = document.getElementById("myLookup"); let instance = Lookup.getInstance(element) as Lookup; // Non-modular approach let element = document.getElementById("myLookup"); let instance = DevExpress.ui.dxLookup.getInstance(element);
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instance()
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off(eventName)
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off(eventName, eventHandler)
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on(eventName, eventHandler)
Use this method to subscribe to one of the events listed in the Events section.
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on(events)
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
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open()
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option()
Gets all widget options.
See Also
- Get and Set Options
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option(optionName)
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- Get and Set Options
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option(optionName, optionValue)
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- Get and Set Options
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option(options)
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- Get and Set Options
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registerKeyHandler(key, handler)
A handler. Accepts the keydown event as the argument. It is a dxEvent or a jQuery.Event when you use jQuery.
The key argument accepts one of the following values:
- "backspace"
- "tab"
- "enter"
- "escape"
- "pageUp"
- "pageDown"
- "end"
- "home"
- "leftArrow"
- "upArrow"
- "rightArrow"
- "downArrow"
- "del"
- "space"
- "F"
- "A"
- "asterisk"
- "minus"
A custom handler for a key cancels the default handler for this key.
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repaint()
See Also
- reload() in DataSource | List
- refresh() in DataGrid | TreeList
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reset()
Resets the value option to the default value.
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