JavaScript/jQuery NumberBox Methods
beginUpdate()
Prevents the UI component from refreshing until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods prevent the UI component from excessive updates when you are changing multiple UI component settings at once. After the beginUpdate() method is called, the UI component does not update its UI until the endUpdate() method is called.
See Also
defaultOptions(rule)
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 NumberBox UI component in an application executed on the desktop.
jQuery
DevExpress.ui.dxNumberBox.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the NumberBox properties
}
});Angular
import NumberBox from "devextreme/ui/number_box";
// ...
export class AppComponent {
constructor () {
NumberBox.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the NumberBox properties
}
});
}
}Vue
<template>
<div>
<DxNumberBox id="numberBox1" />
<DxNumberBox id="numberBox2" />
</div>
</template>
<script>
import DxNumberBox from "devextreme-vue/number-box";
import NumberBox from "devextreme/ui/number_box";
NumberBox.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the NumberBox properties
}
});
export default {
components: {
DxNumberBox
}
}
</script>React
import React, {useEffect} from "react";
import dxNumberBox from "devextreme/ui/number_box";
import NumberBox from "devextreme-react/number-box";
export default function App() {
useEffect(() => {
dxNumberBox.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the NumberBox properties
}
})
});
return (
<div>
<NumberBox id="numberBox1" />
<NumberBox id="numberBox2" />
</div>
)
}dispose()
After calling this method, remove the DOM element associated with the UI component:
$("#myNumberBox").dxNumberBox("dispose");
$("#myNumberBox").remove();Use this method only if the UI component was created with jQuery or pure JavaScript. In Angular, Vue, and React, use conditional rendering:
Angular
<dx-number-box ...
*ngIf="condition">
</dx-number-box>Vue
<template>
<DxNumberBox ...
v-if="condition">
</DxNumberBox>
</template>
<script>
import DxNumberBox from 'devextreme-vue/number-box';
export default {
components: {
DxNumberBox
}
}
</script>React
import React from 'react';
import NumberBox from 'devextreme-react/number-box';
function DxNumberBox(props) {
if (!props.shouldRender) {
return null;
}
return (
<NumberBox ... >
</NumberBox>
);
}
class App extends React.Component {
render() {
return (
<DxNumberBox shouldRender="condition" />
);
}
}
export default App;See Also
getButton(name)
Gets an instance of a custom action button.
Use the returned button instance to call the Button UI component's methods, for example, focus():
jQuery
const myCustomButton = $("#numberBoxContainer").dxNumberBox("getButton", "myCustomButton");
myCustomButton.focus();Angular
import { Component, ViewChild } from '@angular/core';
import { DxNumberBoxComponent } from 'devextreme-angular';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
@ViewChild('numberBoxRef', { static: false }) numberBox: DxNumberBoxComponent;
// Prior to Angular 8
// @ViewChild('numberBoxRef') numberBox: DxNumberBoxComponent;
setFocus() {
this.numberBox.instance.getButton('myCustomButton').focus();
}
}<dx-number-box #numberBoxRef ... > </dx-number-box>
Vue
<template>
<DxNumberBox ...
:ref="numberBoxRef">
</DxNumberBox>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';
import DxNumberBox from 'devextreme-vue/number-box';
export default {
components: {
DxNumberBox
},
data() {
return {
numberBoxRef
}
},
methods: {
setFocus() {
this.numberBox.getButton('myCustomButton').focus();
}
},
computed: {
numberBox: function() {
return this.$refs[numberBoxRef].instance;
}
}
}
</script>React
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import NumberBox from 'devextreme-react/number-box';
class App extends React.Component {
constructor(props) {
super(props);
this.numberBoxRef = React.createRef();
this.setFocus = () => {
this.numberBox.getButton('myCustomButton').focus();
};
}
get numberBox() {
return this.numberBoxRef.current.instance;
}
render() {
return (
<NumberBox ...
ref={this.numberBoxRef}>
</NumberBox>
);
}
}
export default App;getInstance(element)
getInstance is a static method that the UI component class supports. The following code demonstrates how to get the NumberBox instance found in an element with the myNumberBox ID:
// Modular approach
import NumberBox from "devextreme/ui/number_box";
...
let element = document.getElementById("myNumberBox");
let instance = NumberBox.getInstance(element) as NumberBox;
// Non-modular approach
let element = document.getElementById("myNumberBox");
let instance = DevExpress.ui.dxNumberBox.getInstance(element);See Also
registerKeyHandler(key, handler)
A handler. Accepts the keydown event as the argument. It is a EventObject 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.