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Column and Row Indexes

The following indexes can be used in methods and callback functions:

  • Initial Column Index (or simply Column Index)
    Equals the column's index in the columns array.

  • Visible Column Index
    Depends on the column's current location in the TreeList and changes dynamically when columns are reordered. You can get this index using the getVisibleColumnIndex(id) method.

    DevExtreme HTML5 JavaScript TreeList Visible Column Index

    This index is not equal to the index set in the column.visibleIndex property. The latter is used to reorder columns.

  • Row Index
    Equals a row's order among rendered rows. This index starts from 0 and increases by 1 per row including group and detail rows.

    DevExtreme HTML5 JavaScript TreeList Row Index

    Rendered rows can be outside the viewport, for example, if scrolling or row rendering mode is virtual. To get the row index, use the getRowIndexByKey method or rowIndex field in callback functions like onRowClick, onCellClick, etc.