Locked columns

Premium

Updated on Jun 24, 2026

Locked (frozen or sticky) columns are the columns that are visible at all times while the user scrolls the TreeList horizontally.

In order for the locked columns to work properly, configure the following options:

• (Required) Set width of each column.
• (Required) Set locked property of the column.
• (Required) Set overflow: auto and width in pixels through the style property of the TreeList.

By default, the columns of the TreeList are not locked.

The following example demonstrates how to lock the Name and Full Time columns so they remain visible while the user scrolls the TreeList horizontally.

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Suggested Links

• API Reference of the TreeList
• API Index of the TreeList