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Data Grid
- Overview
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Data Binding
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Paging and Scrolling
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Editing
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Grouping
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Filtering and Sorting
- Focused Row
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Row Drag & Drop
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Selection
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Columns
- State Persistence
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Appearance
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Templates
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Data Summaries
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Master-Detail
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Export to PDF
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Export to Excel
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Adaptability
- Keyboard Navigation
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Pivot Grid
- Overview
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Data Binding
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Field Chooser
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Features
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Export to Excel
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Tree List
- Overview
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Data Binding
- Sorting
- Paging
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Editing
- Node Drag & Drop
- Focused Row
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Selection
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Filtering
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Column Customization
- State Persistence
- Adaptability
- Keyboard Navigation
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Scheduler
- Overview
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Data Binding
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Views
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Features
- Virtual Scrolling
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Grouping
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Customization
- Adaptability
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Html Editor
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Chat
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Diagram
- Overview
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Data Binding
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Featured Shapes
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Custom Shapes
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Document Capabilities
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User Interaction
- UI Customization
- Adaptability
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Charts
- Overview
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Data Binding
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Area Charts
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Bar Charts
- Bullet Charts
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Doughnut Charts
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Financial Charts
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Line Charts
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Pie Charts
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Point Charts
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Polar and Radar Charts
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Range Charts
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Sparkline Charts
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Tree Map
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Funnel and Pyramid Charts
- Sankey Chart
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Combinations
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More Features
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Export
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Selection
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Tooltips
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Zooming
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Gantt
- Overview
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Data
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UI Customization
- Strip Lines
- Export to PDF
- Sorting
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Filtering
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Gauges
- Overview
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Data Binding
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Bar Gauge
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Circular Gauge
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Linear Gauge
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Navigation
- Overview
- Accordion
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Menu
- Multi View
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Drawer
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Tab Panel
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Tabs
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Toolbar
- Pagination
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Tree View
- Right-to-Left Support
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Layout
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Editors
- Overview
- Autocomplete
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Calendar
- Check Box
- Color Box
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Date Box
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Date Range Box
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Drop Down Box
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Number Box
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Select Box
- Switch
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Tag Box
- Text Area
- Text Box
- Validation
- Custom Text Editor Buttons
- Right-to-Left Support
- Editor Appearance Variants
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Forms and Multi-Purpose
- Overview
- Button Group
- Field Set
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Filter Builder
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Form
- Radio Group
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Range Selector
- Numeric Scale (Lightweight)
- Numeric Scale
- Date-Time Scale (Lightweight)
- Date-Time Scale
- Logarithmic Scale
- Discrete scale
- Custom Formatting
- Use Range Selection for Calculation
- Use Range Selection for Filtering
- Image on Background
- Chart on Background
- Customized Chart on Background
- Chart on Background with Series Template
- Range Slider
- Slider
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Sortable
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File Management
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File Manager
- Overview
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File System Types
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Customization
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File Uploader
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Actions and Lists
- Overview
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Action Sheet
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Button
- Floating Action Button
- Drop Down Button
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Context Menu
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List
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Lookup
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Maps
- Overview
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Map
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Vector Map
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Dialogs and Notifications
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Localization
JavaScript/jQuery Tree View - Virtual Mode
In virtual mode, the JavaScript TreeView loads a node's children when the node is expanded for the first time. This enhances performance on large datasets.
To enable this feature, set the virtualModeEnabled property to true. Note that this mode is only available when the JavaScript TreeView's dataStructure is plain.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
When the data source is remote, the JavaScript TreeView requests data for each expanded node. To prevent this for nodes that do not nest others, set the hasItems field to false for the corresponding data objects.
This demo enables virtual mode with a remote data source and uses the hasItemsExpr property to specify a custom name for the hasItems
field.
As an alternative to virtual mode, you can use a custom logic to process requested data. To do this, specify the createChildren function as shown in the Load Data on Demand demo.