JavaScript/jQuery DateBox - Handle the Value Change Event
If instead of picking a value, an end user types it into the DateBox, this value applies when the change event is raised. If you need the value to be applied on another event, set the valueChangeEvent property.
jQuery
$(function() { $("#dateBoxContainer").dxDateBox({ value: new Date(), type: "date", valueChangeEvent: "keyup" }); });
Angular
<dx-date-box [(value)]="date" type="date" valueChangeEvent="keyup"> </dx-date-box>
import { DxDateBoxModule } from "devextreme-angular"; // ... export class AppComponent { date: Date = new Date() } @NgModule({ imports: [ // ... DxDateBoxModule ], // ... })
Vue
<template> <DxDateBox :value="date" type="date" value-change-event="keyup" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxDateBox from 'devextreme-vue/date-box'; export default { components: { DxDateBox }, data() { return { date: new Date() }; } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import DateBox from 'devextreme-react/date-box'; class App extends React.Component { constructor(props) { super(props); this.date = new Date(); } render() { return ( <DateBox defaultValue={this.date} type="date" valueChangeEvent="keyup" /> ); } } export default App;
To process a new DateBox value, you need to handle the value change event. If the handling function is not going to be changed during the lifetime of the UI component, assign it to the onValueChanged property when you configure the UI component.
jQuery
$(function() { $("#dateBoxContainer").dxDateBox({ // ... onValueChanged: function (e) { const previousValue = e.previousValue; const newValue = e.value; // Event handling commands go here } }); });
Angular
<dx-date-box ... [(value)]="date" (onValueChanged)="handleValueChange($event)"> </dx-date-box>
import { DxDateBoxModule } from "devextreme-angular"; // ... export class AppComponent { date: Date = new Date(), handleValueChange (e) { const previousValue = e.previousValue; const newValue = e.value; // Event handling commands go here } } @NgModule({ imports: [ // ... DxDateBoxModule ], // ... })
Vue
<template> <DxDateBox v-model:value="date" @value-changed="handleValueChange" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxDateBox from 'devextreme-vue/date-box'; export default { components: { DxDateBox }, data() { return { date: new Date() }; }, methods: { handleValueChange(e) { const previousValue = e.previousValue; const newValue = e.value; // Event handling commands go here } } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import DateBox from 'devextreme-react/date-box'; class App extends React.Component { constructor(props) { super(props); this.state = { date: new Date() }; this.handleValueChange = this.handleValueChange.bind(this); } handleValueChange(e) { const previousValue = e.previousValue; const newValue = e.value; // Event handling commands go here this.setState({ date: newValue }); } render() { return ( <DateBox value={this.state.date} onValueChanged={this.handleValueChange} /> ); } } export default App;
If you are going to change event handlers at runtime, or if you need to attach several handlers to the value change event, subscribe to this event using the on(eventName, eventHandler) method. This approach is more typical of jQuery.
const valueChangedHandler1 = function (e) { const previousValue = e.previousValue; const newValue = e.value; // First handler of the "valueChanged" event }; const valueChangedHandler2 = function (e) { const previousValue = e.previousValue; const newValue = e.value; // Second handler of the "valueChanged" event }; $("#dateBoxContainer").dxDateBox("instance") .on("valueChanged", valueChangedHandler1) .on("valueChanged", valueChangedHandler2);
See Also
If you have technical questions, please create a support ticket in the DevExpress Support Center.