Angular ScrollView Methods
This section describes the members used to manipulate the UI component.
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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.
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clientHeight()
Gets the UI component's height.
The UI component's height in pixels.
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clientWidth()
Gets the UI component's width.
The UI component's width in pixels.
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content()
Gets the UI component's content.
An HTML element or a jQuery element when you use jQuery.
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defaultOptions(rule)
Specifies the device-dependent default configuration properties for this component.
The component's default device properties.
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 ScrollView UI component in an application executed on the desktop.
jQuery
DevExpress.ui.dxScrollView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the ScrollView options } });
Angular
import ScrollView from "devextreme/ui/scroll_view"; // ... export class AppComponent { constructor () { ScrollView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the ScrollView options } }); } }
Vue
<template> <div> <DxScrollView id="scrollView1" /> <DxScrollView id="scrollView2" /> </div> </template> <script> import DxScrollView from "devextreme-vue/scroll-view"; import ScrollView from "devextreme/ui/scroll_view"; ScrollView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the ScrollView options } }); export default { components: { DxScrollView } } </script>
React
import React from "react"; import dxScrollView from "devextreme/ui/scroll_view"; import ScrollView from "devextreme-react/scroll-view"; class App extends React.Component { render () { dxScrollView.defaultOptions({ device: { deviceType: "desktop" }, options: { // Here go the ScrollView options } }) return ( <div> <ScrollView id="scrollView1" /> <ScrollView id="scrollView2" /> </div> ) } } export default App;
dispose()
Disposes of all the resources allocated to the ScrollView instance.
After calling this method, remove the DOM element associated with the UI component:
$("#myScrollView").dxScrollView("dispose"); $("#myScrollView").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-scroll-view ... *ngIf="condition"> </dx-scroll-view>
Vue
<template> <DxScrollView ... v-if="condition"> </DxScrollView> </template> <script> import DxScrollView from 'devextreme-vue/scroll-view'; export default { components: { DxScrollView } } </script>
React
import React from 'react'; import ScrollView from 'devextreme-react/scroll-view'; function DxScrollView(props) { if (!props.shouldRender) { return null; } return ( <ScrollView ... > </ScrollView> ); } class App extends React.Component { render() { return ( <DxScrollView shouldRender="condition" /> ); } } export default App;
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element()
Gets the root UI component element.
An HTML element or a jQuery element when you use jQuery.
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endUpdate()
Refreshes the UI component after a call of the beginUpdate() method.
Main article: beginUpdate()
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getInstance(element)
Gets the instance of a UI component found using its DOM node.
The UI component's instance.
getInstance is a static method that the UI component class supports. The following code demonstrates how to get the ScrollView instance found in an element with the myScrollView
ID:
// Modular approach import ScrollView from "devextreme/ui/scroll_view"; ... let element = document.getElementById("myScrollView"); let instance = ScrollView.getInstance(element) as ScrollView; // Non-modular approach let element = document.getElementById("myScrollView"); let instance = DevExpress.ui.dxScrollView.getInstance(element);
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instance()
Gets the UI component's instance. Use it to access other methods of the UI component.
This UI component's instance.
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off(eventName)
Detaches all event handlers from a single event.
The event's name.
The object for which this method is called.
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- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
off(eventName, eventHandler)
Detaches a particular event handler from a single event.
The object for which this method is called.
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- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
on(eventName, eventHandler)
Subscribes to an event.
The object for which this method is called.
Use this method to subscribe to one of the events listed in the Events section.
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- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
on(events)
Subscribes to events.
Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}
The object for which this method is called.
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
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- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option()
Gets all UI component properties.
The UI component's properties.
See Also
- Get and Set Options
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
option(optionName)
Gets the value of a single property.
The property's name or full path.
This property's value.
See Also
- Get and Set Options
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option(optionName, optionValue)
Updates the value of a single property.
See Also
- Get and Set Options
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option(options)
Updates the values of several properties.
Propertieswith their new values.
See Also
- Get and Set Options
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refresh()
Locks the UI component until the release(preventScrollBottom) method is called and executes the function passed to the onPullDown property and the handler assigned to the pullDown event.
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release(preventScrollBottom)
Notifies the ScrollView that data loading is finished.
Specifies whether to prevent the onReachBottom handler execution.
A Promise that is resolved after the UI component is released. It is a native Promise or a jQuery.Promise when you use jQuery.
Use this method to hide the load indicator and release the scroll view after the pullDown or reachBottom events have been raised.
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resetOption(optionName)
Resets an property to its default value.
An property's name.
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scrollBy(distance)
Scrolls the content by a specific distance.
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scrollHeight()
Gets the scrollable content's height in pixels.
The content's height in pixels.
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scrollLeft()
Gets the left scroll offset.
The left scroll offset in pixels.
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scrollOffset()
Gets the scroll offset.
The scroll offset. Has the following format: { top: scrollTop, left: scrollLeft }.
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scrollTo(targetLocation)
Scrolls the content to a specific position.
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scrollToElement(element)
Scrolls content to an element.
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scrollTop()
Gets the top scroll offset.
The top scroll offset in pixels.
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scrollWidth()
Gets the scrollable content's width in pixels.
The content's width in pixels.
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update()
Updates the scrollable contents' dimensions.
A Promise that is resolved after the update is completed. It is a native Promise or a jQuery.Promise when you use jQuery.
Use this method to fit the UI component's contents to the UI component's size if it changes.
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- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
If you have technical questions, please create a support ticket in the DevExpress Support Center.