Methods
beginUpdate()
Postpones rendering that can negatively affect performance until the endUpdate() method is called.
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 LoadPanel UI component in an application executed on the desktop.
jQuery
DevExpress.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>
)
}dispose()
After calling this method, remove the DOM element associated with the UI component:
$("#myLoadPanel").dxLoadPanel("dispose");
$("#myLoadPanel").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-load-panel ...
*ngIf="condition">
</dx-load-panel>Vue
<template>
<DxLoadPanel ...
v-if="condition">
</DxLoadPanel>
</template>
<script>
import DxLoadPanel from 'devextreme-vue/load-panel';
export default {
components: {
DxLoadPanel
}
}
</script>React
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;See Also
getInstance(element)
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
hide()
A Promise that is resolved after the UI component is hidden. It is a native Promise or a jQuery.Promise when you use jQuery.
show()
A Promise that is resolved after the UI component is shown. It is a native Promise or a jQuery.Promise when you use jQuery.
toggle(showing)
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.