JavaScript/jQuery ValidationSummary 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 ValidationSummary UI component in an application executed on the desktop.
jQuery
DevExpress.ui.dxValidationSummary.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the ValidationSummary properties
}
});Angular
import ValidationSummary from "devextreme/ui/validation_summary";
// ...
export class AppComponent {
constructor () {
ValidationSummary.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the ValidationSummary properties
}
});
}
}Vue
<template>
<div>
<DxValidationSummary id="validationSummary1" />
<DxValidationSummary id="validationSummary2" />
</div>
</template>
<script>
import DxValidationSummary from "devextreme-vue/validation-summary";
import ValidationSummary from "devextreme/ui/validation_summary";
ValidationSummary.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the ValidationSummary properties
}
});
export default {
components: {
DxValidationSummary
}
}
</script>React
import React, {useEffect} from "react";
import dxValidationSummary from "devextreme/ui/validation_summary";
import ValidationSummary from "devextreme-react/validation-summary";
export default function App() {
useEffect(() => {
dxValidationSummary.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the ValidationSummary properties
}
})
});
return (
<div>
<ValidationSummary id="validationSummary1" />
<ValidationSummary id="validationSummary2" />
</div>
)
}dispose()
After calling this method, remove the DOM element associated with the UI component:
$("#myValidationSummary").dxValidationSummary("dispose");
$("#myValidationSummary").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-validation-summary ...
*ngIf="condition">
</dx-validation-summary>Vue
<template>
<DxValidationSummary ...
v-if="condition">
</DxValidationSummary>
</template>
<script>
import DxValidationSummary from 'devextreme-vue/validation-summary';
export default {
components: {
DxValidationSummary
}
}
</script>React
import React from 'react';
import ValidationSummary from 'devextreme-react/validation-summary';
function DxValidationSummary(props) {
if (!props.shouldRender) {
return null;
}
return (
<ValidationSummary ... >
</ValidationSummary>
);
}
class App extends React.Component {
render() {
return (
<DxValidationSummary 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 ValidationSummary instance found in an element with the myValidationSummary ID:
// Modular approach
import ValidationSummary from "devextreme/ui/validation_summary";
...
let element = document.getElementById("myValidationSummary");
let instance = ValidationSummary.getInstance(element) as ValidationSummary;
// Non-modular approach
let element = document.getElementById("myValidationSummary");
let instance = DevExpress.ui.dxValidationSummary.getInstance(element);