This page covers a non-latest version of Handsontable.

# Hooks

Members
Methods

# Members

# afterAddChild

afterAddChild(parent, element, index)

Fired by NestedRows plugin after adding a children to the NestedRows structure. This hook is fired when Options#nestedRows option is enabled.

Param	Type	Description
parent	`object`	The parent object.
element	`object` `undefined`	The element added as a child. If `undefined`, a blank child was added.
index	`number` `undefined`	The index within the parent where the new child was added. If `undefined`, the element was added as the last child.

# afterAutofill

Source code

afterAutofill(fillData, sourceRange, targetRange, direction)

Fired by Autofill plugin after populating the data in the autofill feature. This hook is fired when Options#fillHandle option is enabled.

Since: 8.0.0

Param	Type	Description
fillData	`Array<Array>`	The data that was used to fill the `targetRange`. If `beforeAutofill` was used and returned `[[]]`, this will be the same object that was returned from `beforeAutofill`.
sourceRange	`CellRange`	The range values will be filled from.
targetRange	`CellRange`	The range new values will be filled into.
direction	`string`	Declares the direction of the autofill. Possible values: `up`, `down`, `left`, `right`.

# afterBeginEditing

Source code

afterBeginEditing(row, column)

Fired after the editor is opened and rendered.

Param	Type	Description
row	`number`	Visual row index of the edited cell.
column	`number`	Visual column index of the edited cell.

# afterCellMetaReset

Source code

afterCellMetaReset

Fired after resetting a cell's meta. This happens when the Core#updateSettings method is called.

# afterChange

Source code

afterChange(changes, [source])

Fired after one or more cells has been changed. The changes are triggered in any situation when the value is entered using an editor or changed using API (e.q setDataAtCell).

Note: For performance reasons, the changes array is null for "loadData" source.

Example

new Handsontable(element, {
  afterChange: (changes) => {
    changes.forEach(([row, prop, oldValue, newValue]) => {
      // Some logic...
    });
  }
})

Param	Type	Description
changes	`Array`	2D array containing information about each of the edited cells `[[row, prop, oldVal, newVal], ...]`.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterColumnCollapse

Source code

afterColumnCollapse(currentCollapsedColumns, destinationCollapsedColumns, collapsePossible, successfullyCollapsed)

Fired by CollapsibleColumns plugin before columns collapse. This hook is fired when Options#collapsibleColumns option is enabled.

Since: 8.0.0

Param	Type	Description
currentCollapsedColumns	`Array`	Current collapsible configuration - a list of collapsible physical column indexes.
destinationCollapsedColumns	`Array`	Destination collapsible configuration - a list of collapsible physical column indexes.
collapsePossible	`boolean`	`true`, if all of the column indexes are withing the bounds of the collapsed sections, `false` otherwise.
successfullyCollapsed	`boolean`	`true`, if the action affected any non-collapsible column, `false` otherwise.

# afterColumnExpand

Source code

afterColumnExpand(currentCollapsedColumns, destinationCollapsedColumns, expandPossible, successfullyExpanded)

Fired by CollapsibleColumns plugin before columns expand. This hook is fired when Options#collapsibleColumns option is enabled.

Since: 8.0.0

Param	Type	Description
currentCollapsedColumns	`Array`	Current collapsible configuration - a list of collapsible physical column indexes.
destinationCollapsedColumns	`Array`	Destination collapsible configuration - a list of collapsible physical column indexes.
expandPossible	`boolean`	`true`, if all of the column indexes are withing the bounds of the collapsed sections, `false` otherwise.
successfullyExpanded	`boolean`	`true`, if the action affected any non-collapsible column, `false` otherwise.

# afterColumnMove

Source code

afterColumnMove(movedColumns, finalIndex, dropIndex, movePossible, orderChanged)

Fired by ManualColumnMove plugin after changing order of the visual indexes. This hook is fired when Options#manualColumnMove option is enabled.

Param	Type	Description
movedColumns	`Array`	Array of visual column indexes to be moved.
finalIndex	`number`	Visual column index, being a start index for the moved columns. Points to where the elements will be placed after the moving action. To check visualization of final index please take a look at documentation.
dropIndex	`number` `undefined`	Visual column index, being a drop index for the moved columns. Points to where we are going to drop the moved elements. To check visualization of drop index please take a look at documentation. It's `undefined` when `dragColumns` function wasn't called.
movePossible	`boolean`	Indicates if it was possible to move columns to the desired position.
orderChanged	`boolean`	Indicates if order of columns was changed by move.

# afterColumnResize

Source code

afterColumnResize(newSize, column, isDoubleClick)

Fired by ManualColumnResize plugin after rendering the table with modified column sizes. This hook is fired when Options#manualColumnResize option is enabled.

Param	Type	Description
newSize	`number`	Calculated new column width.
column	`number`	Visual index of the resized column.
isDoubleClick	`boolean`	Flag that determines whether there was a double-click.

# afterColumnSort

Source code

afterColumnSort(currentSortConfig, destinationSortConfigs)

Fired by ColumnSorting and MultiColumnSorting plugins after sorting the column. This hook is fired when Options#columnSorting or Options#multiColumnSorting option is enabled.

Param	Type	Description
currentSortConfig	`Array`	Current sort configuration (for all sorted columns).
destinationSortConfigs	`Array`	Destination sort configuration (for all sorted columns).

# afterContextMenuDefaultOptions

Source code

afterContextMenuDefaultOptions(predefinedItems)

Fired each time user opens ContextMenu and after setting up the Context Menu's default options. These options are a collection which user can select by setting an array of keys or an array of objects in Options#contextMenu option.

Param	Type	Description
predefinedItems	`Array`	An array of objects containing information about the pre-defined Context Menu items.

# afterContextMenuHide

Source code

afterContextMenuHide(context)

Fired by ContextMenu plugin after hiding the Context Menu. This hook is fired when Options#contextMenu option is enabled.

Param	Type	Description
context	`object`	The Context Menu plugin instance.

# afterContextMenuShow

Source code

afterContextMenuShow(context)

Fired by ContextMenu plugin after opening the Context Menu. This hook is fired when Options#contextMenu option is enabled.

Param	Type	Description
context	`object`	The Context Menu plugin instance.

# afterCopy

Source code

afterCopy(data, coords)

Fired by CopyPaste plugin after data are pasted into table. This hook is fired when Options#copyPaste option is enabled.

Param	Type	Description
data	`Array<Array>`	An array of arrays which contains the copied data.
coords	`Array<object>`	An array of objects with ranges of the visual indexes (`startRow`, `startCol`, `endRow`, `endCol`) which was copied.

# afterCopyLimit

Source code

afterCopyLimit(selectedRows, selectedColumns, copyRowsLimit, copyColumnsLimit)

Fired by CopyPaste plugin after reaching the copy limit while copying data. This hook is fired when Options#copyPaste option is enabled.

Param	Type	Description
selectedRows	`number`	Count of selected copyable rows.
selectedColumns	`number`	Count of selected copyable columns.
copyRowsLimit	`number`	Current copy rows limit.
copyColumnsLimit	`number`	Current copy columns limit.

# afterCreateCol

Source code

afterCreateCol(index, amount, [source])

Fired after created a new column.

Param	Type	Description
index	`number`	Represents the visual index of first newly created column in the data source.
amount	`number`	Number of newly created columns in the data source.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterCreateRow

Source code

afterCreateRow(index, amount, [source])

Fired after created a new row.

Param	Type	Description
index	`number`	Represents the visual index of first newly created row in the data source array.
amount	`number`	Number of newly created rows in the data source array.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterCut

Source code

afterCut(data, coords)

Fired by CopyPaste plugin after data was cut out from the table. This hook is fired when Options#copyPaste option is enabled.

Param	Type	Description
data	`Array<Array>`	An array of arrays which contains the cutted out data.
coords	`Array<object>`	An array of objects with ranges of the visual indexes (`startRow`, `startCol`, `endRow`, `endCol`) which was cut out.

# afterDeselect

Source code

afterDeselect

Fired after the current cell is deselected.

# afterDestroy

Source code

afterDestroy

Fired after destroying the Handsontable instance.

# afterDetachChild

Source code

afterDetachChild(parent, element, finalElementPosition)

Fired by NestedRows plugin after detaching a child from its parent. This hook is fired when Options#nestedRows option is enabled.

Param	Type	Description
parent	`object`	An object representing the parent from which the element was detached.
element	`object`	The detached element.
finalElementPosition	`number`	The final row index of the detached element.

# afterDocumentKeyDown

Source code

afterDocumentKeyDown(event)

General hook which captures keydown events attached to the document body. These events are delegated to the hooks system and consumed by Core and internal modules (e.g plugins, editors).

Param	Type	Description
event	`Event`	A native `keydown` event object.

# afterDrawSelection

Source code

afterDrawSelection(currentRow, currentColumn, cornersOfSelection, layerLevel) ⇒ string | undefined

Fired inside the Walkontable's selection draw method. Can be used to add additional class names to cells, depending on the current selection.

Since: 0.38.1

Param	Type	Description
currentRow	`number`	Row index of the currently processed cell.
currentColumn	`number`	Column index of the currently cell.
cornersOfSelection	`Array<number>`	Array of the current selection in a form of `[startRow, startColumn, endRow, endColumn]`.
layerLevel	`number` `undefined`	Number indicating which layer of selection is currently processed.

Returns: string | undefined - Can return a String, which will act as an additional className to be added to the currently processed cell.

# afterDropdownMenuDefaultOptions

Source code

afterDropdownMenuDefaultOptions(predefinedItems)

Fired by DropdownMenu plugin after setting up the Dropdown Menu's default options. These options are a collection which user can select by setting an array of keys or an array of objects in Options#dropdownMenu option.

Param	Type	Description
predefinedItems	`Array<object>`	An array of objects containing information about the pre-defined Context Menu items.

# afterDropdownMenuHide

Source code

afterDropdownMenuHide(instance)

Fired by DropdownMenu plugin after hiding the Dropdown Menu. This hook is fired when Options#dropdownMenu option is enabled.

Param	Type	Description
instance	`DropdownMenu`	The DropdownMenu instance.

# afterDropdownMenuShow

Source code

afterDropdownMenuShow(dropdownMenu)

Fired by DropdownMenu plugin after opening the Dropdown Menu. This hook is fired when Options#dropdownMenu option is enabled.

Param	Type	Description
dropdownMenu	`DropdownMenu`	The DropdownMenu instance.

# afterFilter

Source code

afterFilter(conditionsStack)

Fired by Filters plugin after applying filtering. This hook is fired when Options#filters option is enabled.

Param	Type	Description
conditionsStack	`Array<object>`	An array of objects with added conditions. `js // Example format of the conditionsStack argument: [ { column: 2, conditions: [ {name: 'begins_with', args: [['S']]} ], operation: 'conjunction' }, { column: 4, conditions: [ {name: 'not_empty', args: []} ], operation: 'conjunction' }, ]`

# afterFormulasValuesUpdate

Source code

afterFormulasValuesUpdate(changes)

Called when a value is updated in the engine.

Since: 9.0.0

Param	Type	Description
changes	`Array`	The values and location of applied changes.

# afterGetCellMeta

Source code

afterGetCellMeta(row, column, cellProperties)

Fired after getting the cell settings.

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
cellProperties	`object`	Object containing the cell properties.

# afterGetColHeader

Source code

afterGetColHeader(column, TH)

Fired after retrieving information about a column header and appending it to the table header.

Param	Type	Description
column	`number`	Visual column index.
TH	`HTMLTableCellElement`	Header's TH element.

# afterGetColumnHeaderRenderers

Source code

afterGetColumnHeaderRenderers(renderers)

Fired after getting the column header renderers.

Param	Type	Description
renderers	`Array<function()>`	An array of the column header renderers.

# afterGetRowHeader

Source code

afterGetRowHeader(row, TH)

Fired after retrieving information about a row header and appending it to the table header.

Param	Type	Description
row	`number`	Visual row index.
TH	`HTMLTableCellElement`	Header's TH element.

# afterGetRowHeaderRenderers

Source code

afterGetRowHeaderRenderers(renderers)

Fired after getting the row header renderers.

Param	Type	Description
renderers	`Array<function()>`	An array of the row header renderers.

# afterHideColumns

Source code

afterHideColumns(currentHideConfig, destinationHideConfig, actionPossible, stateChanged)

Fired by HiddenColumns plugin after marking the columns as hidden. Fired only if the Options#hiddenColumns option is enabled.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical column indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical column indexes.
actionPossible	`boolean`	`true`, if the provided column indexes are valid, `false` otherwise.
stateChanged	`boolean`	`true`, if the action affected any non-hidden columns, `false` otherwise.

# afterHideRows

Source code

afterHideRows(currentHideConfig, destinationHideConfig, actionPossible, stateChanged)

Fired by HiddenRows plugin after marking the rows as hidden. Fired only if the Options#hiddenRows option is enabled.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical row indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical row indexes.
actionPossible	`boolean`	`true`, if provided row indexes are valid, `false` otherwise.
stateChanged	`boolean`	`true`, if the action affected any non-hidden rows, `false` otherwise.

# afterInit

Source code

afterInit

Fired after the Handsontable instance is initiated.

# afterLanguageChange

Source code

afterLanguageChange(languageCode)

Fired after successful change of language (when proper language code was set).

Since: 0.35.0

Param	Type	Description
languageCode	`string`	New language code.

# afterListen

Source code

afterListen

Fired after the table was switched into listening mode. This allows Handsontable to capture keyboard events and respond in the right way.

# afterLoadData

Source code

afterLoadData(sourceData, initialLoad, source)

Fired after Handsontable's data gets modified by the loadData() method or the updateSettings() method.

Param	Type	Description
sourceData	`Array`	An array of arrays, or an array of objects, that contains Handsontable's data
initialLoad	`boolean`	A flag that indicates whether the data was loaded at Handsontable's initialization (`true`) or later (`false`)
source	`string`	The source of the call

# afterMergeCells

Source code

afterMergeCells(cellRange, mergeParent, [auto])

Fired by MergeCells plugin after cell merging. This hook is fired when Options#mergeCells option is enabled.

Param	Type	Default	Description
cellRange	`CellRange`		Selection cell range.
mergeParent	`object`		The parent collection of the provided cell range.
[auto]	`boolean`	`false`	`optional` `true` if called automatically by the plugin.

# afterModifyTransformEnd

Source code

afterModifyTransformEnd(coords, rowTransformDir, colTransformDir)

Fired after the end of the selection is being modified (e.g. Moving the selection with the arrow keys).

Param	Type	Description
coords	`CellCoords`	Visual coords of the freshly selected cell.
rowTransformDir	`number`	`-1` if trying to select a cell with a negative row index. `0` otherwise.
colTransformDir	`number`	`-1` if trying to select a cell with a negative column index. `0` otherwise.

# afterModifyTransformStart

Source code

afterModifyTransformStart(coords, rowTransformDir, colTransformDir)

Fired after the start of the selection is being modified (e.g. Moving the selection with the arrow keys).

Param	Type	Description
coords	`CellCoords`	Coords of the freshly selected cell.
rowTransformDir	`number`	`-1` if trying to select a cell with a negative row index. `0` otherwise.
colTransformDir	`number`	`-1` if trying to select a cell with a negative column index. `0` otherwise.

# afterMomentumScroll

Source code

afterMomentumScroll

Fired after a scroll event, which is identified as a momentum scroll (e.g. On an iPad).

# afterNamedExpressionAdded

Source code

afterNamedExpressionAdded(namedExpressionName, changes)

Called when a named expression is added to the Formulas' engine instance.

Since: 9.0.0

Param	Type	Description
namedExpressionName	`string`	The name of the added expression.
changes	`Array`	The values and location of applied changes.

# afterNamedExpressionRemoved

Source code

afterNamedExpressionRemoved(namedExpressionName, changes)

Called when a named expression is removed from the Formulas' engine instance.

Since: 9.0.0

Param	Type	Description
namedExpressionName	`string`	The name of the removed expression.
changes	`Array`	The values and location of applied changes.

# afterOnCellContextMenu

Source code

afterOnCellContextMenu(event, coords, TD)

Fired after clicking right mouse button on a cell or row/column header.

For example clicking on the row header of cell (0, 0) results with afterOnCellContextMenu called with coordinates {row: 0, col: -1}.

Since: 4.1.0

Param	Type	Description
event	`Event`	`contextmenu` event object.
coords	`CellCoords`	Coordinates object containing the visual row and visual column indexes of the clicked cell.
TD	`HTMLTableCellElement`	Cell's TD (or TH) element.

# afterOnCellCornerDblClick

Source code

afterOnCellCornerDblClick(event)

Fired after a dblclick event is triggered on the cell corner (the drag handle).

Param	Type	Description
event	`Event`	`dblclick` event object.

# afterOnCellCornerMouseDown

Source code

afterOnCellCornerMouseDown(event)

Fired after a mousedown event is triggered on the cell corner (the drag handle).

Param	Type	Description
event	`Event`	`mousedown` event object.

# afterOnCellMouseDown

Source code

afterOnCellMouseDown(event, coords, TD)

Fired after clicking on a cell or row/column header. In case the row/column header was clicked, the coordinate indexes are negative.

For example clicking on the row header of cell (0, 0) results with afterOnCellMouseDown called with coordinates {row: 0, col: -1}.

Param	Type	Description
event	`Event`	`mousedown` event object.
coords	`CellCoords`	Coordinates object containing the visual row and visual column indexes of the clicked cell.
TD	`HTMLTableCellElement`	Cell's TD (or TH) element.

# afterOnCellMouseOut

Source code

afterOnCellMouseOut(event, coords, TD)

Fired after leaving a cell or row/column header with the mouse cursor.

Param	Type	Description
event	`Event`	`mouseout` event object.
coords	`CellCoords`	Leaved cell's visual coordinate object.
TD	`HTMLTableCellElement`	Cell's TD (or TH) element.

# afterOnCellMouseOver

Source code

afterOnCellMouseOver(event, coords, TD)

Fired after hovering a cell or row/column header with the mouse cursor. In case the row/column header was hovered, the index is negative.

For example, hovering over the row header of cell (0, 0) results with afterOnCellMouseOver called with coords {row: 0, col: -1}.

Param	Type	Description
event	`Event`	`mouseover` event object.
coords	`CellCoords`	Hovered cell's visual coordinate object.
TD	`HTMLTableCellElement`	Cell's TD (or TH) element.

# afterOnCellMouseUp

Source code

afterOnCellMouseUp(event, coords, TD)

Fired after clicking on a cell or row/column header. In case the row/column header was clicked, the coordinate indexes are negative.

For example clicking on the row header of cell (0, 0) results with afterOnCellMouseUp called with coordinates {row: 0, col: -1}.

Param	Type	Description
event	`Event`	`mouseup` event object.
coords	`CellCoords`	Coordinates object containing the visual row and visual column indexes of the clicked cell.
TD	`HTMLTableCellElement`	Cell's TD (or TH) element.

# afterPaste

Source code

afterPaste(data, coords)

Fired by CopyPaste plugin after values are pasted into table. This hook is fired when Options#copyPaste option is enabled.

Param	Type	Description
data	`Array<Array>`	An array of arrays which contains the pasted data.
coords	`Array<object>`	An array of objects with ranges of the visual indexes (`startRow`, `startCol`, `endRow`, `endCol`) that correspond to the previously selected area.

# afterPluginsInitialized

Source code

afterPluginsInitialized

Fired after initializing all the plugins. This hook should be added before Handsontable is initialized.

Example

Handsontable.hooks.add('afterPluginsInitialized', myCallback);

# afterRedo

Source code

afterRedo(action)

Fired by UndoRedo plugin after the redo action. Contains information about the action that is being redone. This hook is fired when Options#undo option is enabled.

Param	Type	Description
action	`object`	The action object. Contains information about the action being redone. The `actionType` property of the object specifies the type of the action in a String format (e.g. `'remove_row'`).

# afterRedoStackChange

Source code

afterRedoStackChange(undoneActionsBefore, undoneActionsAfter)

Fired by UndoRedo plugin after changing redo stack.

Since: 8.4.0

Param	Type	Description
undoneActionsBefore	`Array`	Stack of actions which could be redone before performing new action.
undoneActionsAfter	`Array`	Stack of actions which can be redone after performing new action.

# afterRefreshDimensions

Source code

afterRefreshDimensions(previousDimensions, currentDimensions, stateChanged)

Fired after the window was resized.

Param	Type	Description
previousDimensions	`object`	Previous dimensions of the container.
currentDimensions	`object`	Current dimensions of the container.
stateChanged	`boolean`	`true`, if the container was re-render, `false` otherwise.

# afterRemoveCellMeta

Source code

afterRemoveCellMeta(row, column, key, value)

Fired after cell meta is removed.

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
key	`string`	The removed meta key.
value	`*`	Value which was under removed key of cell meta.

# afterRemoveCol

Source code

afterRemoveCol(index, amount, physicalColumns, [source])

Fired after one or more columns are removed.

Param	Type	Description
index	`number`	Visual index of starter column.
amount	`number`	An amount of removed columns.
physicalColumns	`Array<number>`	An array of physical columns removed from the data source.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterRemoveRow

Source code

afterRemoveRow(index, amount, physicalRows, [source])

Fired after one or more rows are removed.

Param	Type	Description
index	`number`	Visual index of starter row.
amount	`number`	An amount of removed rows.
physicalRows	`Array<number>`	An array of physical rows removed from the data source.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterRender

Source code

afterRender(isForced)

Fired after Handsontable's view-rendering engine updates the view.

Param	Type	Description
isForced	`boolean`	If set to `true`, the rendering gets triggered by a change of settings, a change of data, or a logic that needs a full Handsontable render cycle. If set to `false`, the rendering gets triggered by scrolling or moving the selection.

# afterRenderer

Source code

afterRenderer(TD, row, column, prop, value, cellProperties)

Fired after finishing rendering the cell (after the renderer finishes).

Param	Type	Description
TD	`HTMLTableCellElement`	Currently rendered cell's TD element.
row	`number`	Visual row index.
column	`number`	Visual column index.
prop	`string` `number`	Column property name or a column index, if datasource is an array of arrays.
value	`*`	Value of the rendered cell.
cellProperties	`object`	Object containing the cell's properties.

# afterRowMove

Source code

afterRowMove(movedRows, finalIndex, dropIndex, movePossible, orderChanged)

Fired by ManualRowMove plugin after changing the order of the visual indexes. This hook is fired when Options#manualRowMove option is enabled.

Param	Type	Description
movedRows	`Array`	Array of visual row indexes to be moved.
finalIndex	`number`	Visual row index, being a start index for the moved rows. Points to where the elements will be placed after the moving action. To check visualization of final index please take a look at documentation.
dropIndex	`number` `undefined`	Visual row index, being a drop index for the moved rows. Points to where we are going to drop the moved elements. To check visualization of drop index please take a look at documentation. It's `undefined` when `dragRows` function wasn't called.
movePossible	`boolean`	Indicates if it was possible to move rows to the desired position.
orderChanged	`boolean`	Indicates if order of rows was changed by move.

# afterRowResize

Source code

afterRowResize(newSize, row, isDoubleClick)

Fired by ManualRowResize plugin after rendering the table with modified row sizes. This hook is fired when Options#manualRowResize option is enabled.

Param	Type	Description
newSize	`number`	Calculated new row height.
row	`number`	Visual index of the resized row.
isDoubleClick	`boolean`	Flag that determines whether there was a double-click.

# afterScrollHorizontally

Source code

afterScrollHorizontally

Fired after the horizontal scroll event.

# afterScrollVertically

Source code

afterScrollVertically

Fired after the vertical scroll event.

# afterSelection

Source code

afterSelection(row, column, row2, column2, preventScrolling, preventScrolling, selectionLayerLevel)

Fired after one or more cells are selected (e.g. During mouse move).

Example

new Handsontable(element, {
  afterSelection: (row, column, row2, column2, preventScrolling, selectionLayerLevel) => {
    // If set to `false` (default): when cell selection is outside the viewport,
    // Handsontable scrolls the viewport to cell selection's end corner.
    // If set to `true`: when cell selection is outside the viewport,
    // Handsontable doesn't scroll to cell selection's end corner.
    preventScrolling.value = true;
  }
})

Param	Type	Description
row	`number`	Selection start visual row index.
column	`number`	Selection start visual column index.
row2	`number`	Selection end visual row index.
column2	`number`	Selection end visual column index.
preventScrolling	`object`	A reference to the observable object with the `value` property. Property `preventScrolling.value` expects a boolean value that Handsontable uses to control scroll behavior after selection.
preventScrolling	`object`	Object with `value` property where its value change will be observed.
selectionLayerLevel	`number`	The number which indicates what selection layer is currently modified.

# afterSelectionByProp

Source code

afterSelectionByProp(row, prop, row2, prop2, preventScrolling, selectionLayerLevel)

Fired after one or more cells are selected.

The prop and prop2 arguments represent the source object property name instead of the column number.

Example

new Handsontable(element, {
  afterSelectionByProp: (row, column, row2, column2, preventScrolling, selectionLayerLevel) => {
    // setting if prevent scrolling after selection
    preventScrolling.value = true;
  }
})

Param	Type	Description
row	`number`	Selection start visual row index.
prop	`string`	Selection start data source object property name.
row2	`number`	Selection end visual row index.
prop2	`string`	Selection end data source object property name.
preventScrolling	`object`	Object with `value` property where its value change will be observed.
selectionLayerLevel	`number`	The number which indicates what selection layer is currently modified.

# afterSelectionEnd

Source code

afterSelectionEnd(row, column, row2, column2, selectionLayerLevel)

Fired after one or more cells are selected (e.g. On mouse up).

Param	Type	Description
row	`number`	Selection start visual row index.
column	`number`	Selection start visual column index.
row2	`number`	Selection end visual row index.
column2	`number`	Selection end visual column index.
selectionLayerLevel	`number`	The number which indicates what selection layer is currently modified.

# afterSelectionEndByProp

Source code

afterSelectionEndByProp(row, prop, row2, prop2, selectionLayerLevel)

Fired after one or more cells are selected (e.g. On mouse up).

The prop and prop2 arguments represent the source object property name instead of the column number.

Param	Type	Description
row	`number`	Selection start visual row index.
prop	`string`	Selection start data source object property index.
row2	`number`	Selection end visual row index.
prop2	`string`	Selection end data source object property index.
selectionLayerLevel	`number`	The number which indicates what selection layer is currently modified.

# afterSetCellMeta

Source code

afterSetCellMeta(row, column, key, value)

Fired after cell meta is changed.

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
key	`string`	The updated meta key.
value	`*`	The updated meta value.

# afterSetDataAtCell

Source code

afterSetDataAtCell(changes, [source])

Fired after cell data was changed.

Param	Type	Description
changes	`Array`	An array of changes in format `[[row, column, oldValue, value], ...]`.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterSetDataAtRowProp

Source code

afterSetDataAtRowProp(changes, [source])

Fired after cell data was changed. Called only when setDataAtRowProp was executed.

Param	Type	Description
changes	`Array`	An array of changes in format `[[row, prop, oldValue, value], ...]`.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# afterSetSourceDataAtCell

Source code

afterSetSourceDataAtCell(changes, [source])

Fired after cell source data was changed.

Since: 8.0.0

Param	Type	Description
changes	`Array`	An array of changes in format `[[row, column, oldValue, value], ...]`.
[source]	`string`	`optional` String that identifies source of hook call.

# afterSheetAdded

Source code

afterSheetAdded(addedSheetDisplayName)

Called when a new sheet is added to the Formulas' engine instance.

Since: 9.0.0

Param	Type	Description
addedSheetDisplayName	`string`	The name of the added sheet.

# afterSheetRemoved

Source code

afterSheetRemoved(removedSheetDisplayName, changes)

Called when a sheet is removed from the Formulas' engine instance.

Since: 9.0.0

Param	Type	Description
removedSheetDisplayName	`string`	The removed sheet name.
changes	`Array`	The values and location of applied changes.

# afterSheetRenamed

Source code

afterSheetRenamed(oldDisplayName, newDisplayName)

Called when a sheet in the Formulas' engine instance is renamed.

Since: 9.0.0

Param	Type	Description
oldDisplayName	`string`	The old name of the sheet.
newDisplayName	`string`	The new name of the sheet.

# afterTrimRow

Source code

afterTrimRow(currentTrimConfig, destinationTrimConfig, actionPossible, stateChanged) ⇒ undefined | boolean

Fired by TrimRows plugin after trimming rows. This hook is fired when Options#trimRows option is enabled.

Param	Type	Description
currentTrimConfig	`Array`	Current trim configuration - a list of trimmed physical row indexes.
destinationTrimConfig	`Array`	Destination trim configuration - a list of trimmed physical row indexes.
actionPossible	`boolean`	`true`, if all of the row indexes are withing the bounds of the table, `false` otherwise.
stateChanged	`boolean`	`true`, if the action affected any non-trimmed rows, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the trimming action will not be completed.

# afterUndo

Source code

afterUndo(action)

Fired by UndoRedo plugin after the undo action. Contains information about the action that is being undone. This hook is fired when Options#undo option is enabled.

Param	Type	Description
action	`object`	The action object. Contains information about the action being undone. The `actionType` property of the object specifies the type of the action in a String format. (e.g. `'remove_row'`).

# afterUndoStackChange

Source code

afterUndoStackChange(doneActionsBefore, doneActionsAfter)

Fired by UndoRedo plugin after changing undo stack.

Since: 8.4.0

Param	Type	Description
doneActionsBefore	`Array`	Stack of actions which could be undone before performing new action.
doneActionsAfter	`Array`	Stack of actions which can be undone after performing new action.

# afterUnhideColumns

Source code

afterUnhideColumns(currentHideConfig, destinationHideConfig, actionPossible, stateChanged)

Fired by HiddenColumns plugin after marking the columns as not hidden. Fired only if the Options#hiddenColumns option is enabled.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical column indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical column indexes.
actionPossible	`boolean`	`true`, if the provided column indexes are valid, `false` otherwise.
stateChanged	`boolean`	`true`, if the action affected any hidden columns, `false` otherwise.

# afterUnhideRows

Source code

afterUnhideRows(currentHideConfig, destinationHideConfig, actionPossible, stateChanged)

Fired by HiddenRows plugin after marking the rows as not hidden. Fired only if the Options#hiddenRows option is enabled.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical row indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical row indexes.
actionPossible	`boolean`	`true`, if provided row indexes are valid, `false` otherwise.
stateChanged	`boolean`	`true`, if the action affected any hidden rows, `false` otherwise.

# afterUnlisten

Source code

afterUnlisten

Fired after the table was switched off from the listening mode. This makes the Handsontable inert for any keyboard events.

# afterUnmergeCells

Source code

afterUnmergeCells(cellRange, [auto])

Fired by MergeCells plugin after unmerging the cells. This hook is fired when Options#mergeCells option is enabled.

Param	Type	Default	Description
cellRange	`CellRange`		Selection cell range.
[auto]	`boolean`	`false`	`optional` `true` if called automatically by the plugin.

# afterUntrimRow

Source code

afterUntrimRow(currentTrimConfig, destinationTrimConfig, actionPossible, stateChanged) ⇒ undefined | boolean

Fired by TrimRows plugin after untrimming rows. This hook is fired when Options#trimRows option is enabled.

Param	Type	Description
currentTrimConfig	`Array`	Current trim configuration - a list of trimmed physical row indexes.
destinationTrimConfig	`Array`	Destination trim configuration - a list of trimmed physical row indexes.
actionPossible	`boolean`	`true`, if all of the row indexes are withing the bounds of the table, `false` otherwise.
stateChanged	`boolean`	`true`, if the action affected any trimmed rows, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the untrimming action will not be completed.

# afterUpdateData

Source code

afterUpdateData(sourceData, initialLoad, source)

Fired after the updateData() method modifies Handsontable's data.

Since: 11.1.0

Param	Type	Description
sourceData	`Array`	An array of arrays, or an array of objects, that contains Handsontable's data
initialLoad	`boolean`	A flag that indicates whether the data was loaded at Handsontable's initialization (`true`) or later (`false`)
source	`string`	The source of the call

# afterUpdateSettings

Source code

afterUpdateSettings(newSettings)

Fired after calling the updateSettings method.

Param	Type	Description
newSettings	`object`	New settings object.

# afterValidate

Source code

afterValidate(isValid, value, row, prop, [source]) ⇒ void | boolean

A plugin hook executed after validator function, only if validator function is defined. Validation result is the first parameter. This can be used to determinate if validation passed successfully or not.

Returning false from the callback will mark the cell as invalid.

Param	Type	Description
isValid	`boolean`	`true` if valid, `false` if not.
value	`*`	The value in question.
row	`number`	Visual row index.
prop	`string` `number`	Property name / visual column index.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

Returns: void | boolean - If false the cell will be marked as invalid, true otherwise.

# afterViewportColumnCalculatorOverride

Source code

afterViewportColumnCalculatorOverride(calc)

Fired inside the viewportColumnCalculatorOverride method. Allows modifying the row calculator parameters.

Param	Type	Description
calc	`object`	The row calculator.

# afterViewportRowCalculatorOverride

Source code

afterViewportRowCalculatorOverride(calc)

Fired inside the viewportRowCalculatorOverride method. Allows modifying the row calculator parameters.

Param	Type	Description
calc	`object`	The row calculator.

# afterViewRender

Source code

afterViewRender(isForced)

Fired after Handsontable's view-rendering engine is rendered, but before redrawing the selection borders and before scroll syncing.

Note: In Handsontable 9.x and earlier, the afterViewRender hook was named afterRender.

Since: 10.0.0

Param	Type	Description
isForced	`boolean`	If set to `true`, the rendering gets triggered by a change of settings, a change of data, or a logic that needs a full Handsontable render cycle. If set to `false`, the rendering gets triggered by scrolling or moving the selection.

# beforeAddChild

Source code

beforeAddChild(parent, element, index)

Fired by NestedRows plugin before adding a children to the NestedRows structure. This hook is fired when Options#nestedRows option is enabled.

Param	Type	Description
parent	`object`	The parent object.
element	`object` `undefined`	The element added as a child. If `undefined`, a blank child was added.
index	`number` `undefined`	The index within the parent where the new child was added. If `undefined`, the element was added as the last child.

# beforeAutofill

Source code

beforeAutofill(selectionData, sourceRange, targetRange, direction) ⇒ boolean | Array<Array>

Fired by Autofill plugin before populating the data in the autofill feature. This hook is fired when Options#fillHandle option is enabled.

Param	Type	Description
selectionData	`Array<Array>`	Data the autofill operation will start from.
sourceRange	`CellRange`	The range values will be filled from.
targetRange	`CellRange`	The range new values will be filled into.
direction	`string`	Declares the direction of the autofill. Possible values: `up`, `down`, `left`, `right`.

Returns: boolean | Array<Array> - If false, the operation is cancelled. If array of arrays, the returned data will be passed into populateFromArray instead of the default autofill algorithm's result.

# beforeAutofillInsidePopulate

Source code

beforeAutofillInsidePopulate(index, direction, input, deltas)

Deprecated

Fired from the populateFromArray method during the autofill process. Fired for each "autofilled" cell individually.

Param	Type	Description
index	`object`	Object containing `row` and `col` properties, defining the number of rows/columns from the initial cell of the autofill.
direction	`string`	Declares the direction of the autofill. Possible values: `up`, `down`, `left`, `right`.
input	`Array<Array>`	Contains an array of rows with data being used in the autofill.
deltas	`Array`	The deltas array passed to the `populateFromArray` method.

# beforeCellAlignment

Source code

beforeCellAlignment(stateBefore, range, type, alignmentClass)

Fired before aligning the cell contents.

Param	Type	Description
stateBefore	`object`	An object with class names defining the cell alignment.
range	`Array<CellRange>`	An array of CellRange coordinates where the alignment will be applied.
type	`string`	Type of the alignment - either `horizontal` or `vertical`.
alignmentClass	`string`	String defining the alignment class added to the cell. Possible values: * `htLeft` * `htCenter` * `htRight` * `htJustify` * `htTop` * `htMiddle` * `htBottom`.

# beforeChange

Source code

beforeChange(changes, [source]) ⇒ void | boolean

Fired before one or more cells is changed. Its main purpose is to alter changes silently after input and before table rendering.

Example

// To disregard a single change, set changes[i] to null or remove it from array using changes.splice(i, 1).
new Handsontable(element, {
  beforeChange: (changes, source) => {
    // [[row, prop, oldVal, newVal], ...]
    changes[0] = null;
  }
});
// To alter a single change, overwrite the desired value to changes[i][3].
new Handsontable(element, {
  beforeChange: (changes, source) => {
    // [[row, prop, oldVal, newVal], ...]
    changes[0][3] = 10;
  }
});
// To cancel all edit, return false from the callback or set array length to 0 (changes.length = 0).
new Handsontable(element, {
  beforeChange: (changes, source) => {
    // [[row, prop, oldVal, newVal], ...]
    return false;
  }
});

Param	Type	Description
changes	`Array<Array>`	2D array containing information about each of the edited cells.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

Returns: void | boolean - If false all changes were cancelled, true otherwise.

# beforeChangeRender

Source code

beforeChangeRender(changes, [source])

Fired right before rendering the changes.

Param	Type	Description
changes	`Array<Array>`	Array in form of `[row, prop, oldValue, newValue]`.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# beforeColumnCollapse

Source code

beforeColumnCollapse(currentCollapsedColumns, destinationCollapsedColumns, collapsePossible) ⇒ undefined | boolean

Fired by CollapsibleColumns plugin before columns collapse. This hook is fired when Options#collapsibleColumns option is enabled.

Since: 8.0.0

Param	Type	Description
currentCollapsedColumns	`Array`	Current collapsible configuration - a list of collapsible physical column indexes.
destinationCollapsedColumns	`Array`	Destination collapsible configuration - a list of collapsible physical column indexes.
collapsePossible	`boolean`	`true`, if all of the column indexes are withing the bounds of the collapsed sections, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the collapsing action will not be completed.

# beforeColumnExpand

Source code

beforeColumnExpand(currentCollapsedColumns, destinationCollapsedColumns, expandPossible) ⇒ undefined | boolean

Fired by CollapsibleColumns plugin before columns expand. This hook is fired when Options#collapsibleColumns option is enabled.

Since: 8.0.0

Param	Type	Description
currentCollapsedColumns	`Array`	Current collapsible configuration - a list of collapsible physical column indexes.
destinationCollapsedColumns	`Array`	Destination collapsible configuration - a list of collapsible physical column indexes.
expandPossible	`boolean`	`true`, if all of the column indexes are withing the bounds of the collapsed sections, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the expanding action will not be completed.

# beforeColumnMove

Source code

beforeColumnMove(movedColumns, finalIndex, dropIndex, movePossible) ⇒ void | boolean

Fired by ManualColumnMove plugin before change order of the visual indexes. This hook is fired when Options#manualColumnMove option is enabled.

Param	Type	Description
movedColumns	`Array`	Array of visual column indexes to be moved.
finalIndex	`number`	Visual column index, being a start index for the moved columns. Points to where the elements will be placed after the moving action. To check visualization of final index please take a look at documentation.
dropIndex	`number` `undefined`	Visual column index, being a drop index for the moved columns. Points to where we are going to drop the moved elements. To check visualization of drop index please take a look at documentation. It's `undefined` when `dragColumns` function wasn't called.
movePossible	`boolean`	Indicates if it's possible to move rows to the desired position.

Returns: void | boolean - If false the column will not be moved, true otherwise.

# beforeColumnResize

Source code

beforeColumnResize(newSize, column, isDoubleClick) ⇒ number

Fired by ManualColumnResize plugin before rendering the table with modified column sizes. This hook is fired when Options#manualColumnResize option is enabled.

Param	Type	Description
newSize	`number`	Calculated new column width.
column	`number`	Visual index of the resized column.
isDoubleClick	`boolean`	Flag that determines whether there was a double-click.

Returns: number - Returns a new column size or undefined, if column size should be calculated automatically.

# beforeColumnSort

Source code

beforeColumnSort(currentSortConfig, destinationSortConfigs) ⇒ boolean | void

Fired by ColumnSorting and MultiColumnSorting plugins before sorting the column. If you return false value inside callback for hook, then sorting will be not applied by the Handsontable (useful for server-side sorting).

This hook is fired when Options#columnSorting or Options#multiColumnSorting option is enabled.

Param	Type	Description
currentSortConfig	`Array`	Current sort configuration (for all sorted columns).
destinationSortConfigs	`Array`	Destination sort configuration (for all sorted columns).

Returns: boolean | void - If false the column will not be sorted, true otherwise.

# beforeContextMenuSetItems

Source code

beforeContextMenuSetItems(menuItems)

Fired each time user opens ContextMenu plugin before setting up the Context Menu's items but after filtering these options by user (contextMenu option). This hook can by helpful to determine if user use specified menu item or to set up one of the menu item to by always visible.

Param	Type	Description
menuItems	`Array<object>`	An array of objects containing information about to generated Context Menu items.

# beforeContextMenuShow

Source code

beforeContextMenuShow(context)

Fired by ContextMenu plugin before opening the Context Menu. This hook is fired when Options#contextMenu option is enabled.

Param	Type	Description
context	`object`	The Context Menu instance.

# beforeCopy

Source code

beforeCopy(data, coords) ⇒ *

Fired before values are copied into clipboard.

Example

// To disregard a single row, remove it from array using data.splice(i, 1).
...
new Handsontable(document.getElementById('example'), {
  beforeCopy: (data, coords) => {
    // data -> [[1, 2, 3], [4, 5, 6]]
    data.splice(0, 1);
    // data -> [[4, 5, 6]]
    // coords -> [{startRow: 0, startCol: 0, endRow: 1, endCol: 2}]
  }
});
...

// To cancel copying, return false from the callback.
...
new Handsontable(document.getElementById('example'), {
  beforeCopy: (data, coords) => {
    return false;
  }
});
...

Param	Type	Description
data	`Array<Array>`	An array of arrays which contains data to copied.
coords	`Array<object>`	An array of objects with ranges of the visual indexes (`startRow`, `startCol`, `endRow`, `endCol`) which will copied.

Returns: * - If returns false then copying is canceled.

# beforeCreateCol

Source code

beforeCreateCol(index, amount, [source]) ⇒ *

Fired before created a new column.

Example

// Return `false` to cancel column inserting.
new Handsontable(element, {
  beforeCreateCol: function(data, coords) {
    return false;
  }
});

Param	Type	Description
index	`number`	Represents the visual index of first newly created column in the data source array.
amount	`number`	Number of newly created columns in the data source array.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

Returns: * - If false then creating columns is cancelled.

# beforeCreateRow

Source code

beforeCreateRow(index, amount, [source]) ⇒ * | boolean

Fired before created a new row.

Param	Type	Description
index	`number`	Represents the visual index of first newly created row in the data source array.
amount	`number`	Number of newly created rows in the data source array.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

Returns: * | boolean - If false is returned the action is canceled.

# beforeCut

Source code

beforeCut(data, coords) ⇒ *

Fired by CopyPaste plugin before copying the values into clipboard and before clearing values of the selected cells. This hook is fired when Options#copyPaste option is enabled.

Example

// To disregard a single row, remove it from the array using data.splice(i, 1).
new Handsontable(element, {
  beforeCut: function(data, coords) {
    // data -> [[1, 2, 3], [4, 5, 6]]
    data.splice(0, 1);
    // data -> [[4, 5, 6]]
    // coords -> [{startRow: 0, startCol: 0, endRow: 1, endCol: 2}]
  }
});
// To cancel a cutting action, just return `false`.
new Handsontable(element, {
  beforeCut: function(data, coords) {
    return false;
  }
});

Param	Type	Description
data	`Array<Array>`	An array of arrays which contains data to cut.
coords	`Array<object>`	An array of objects with ranges of the visual indexes (`startRow`, `startCol`, `endRow`, `endCol`) which will be cut out.

Returns: * - If returns false then operation of the cutting out is canceled.

# beforeDetachChild

Source code

beforeDetachChild(parent, element)

Fired by NestedRows plugin before detaching a child from its parent. This hook is fired when Options#nestedRows option is enabled.

Param	Type	Description
parent	`object`	An object representing the parent from which the element is to be detached.
element	`object`	The detached element.

# beforeDrawBorders

Source code

beforeDrawBorders(corners, borderClassName)

Fired before drawing the borders.

Param	Type	Description
corners	`Array`	Array specifying the current selection borders.
borderClassName	`string`	Specifies the border class name.

# beforeDropdownMenuSetItems

Source code

beforeDropdownMenuSetItems(menuItems)

Fired by DropdownMenu plugin before setting up the Dropdown Menu's items but after filtering these options by user (dropdownMenu option). This hook can by helpful to determine if user use specified menu item or to set up one of the menu item to by always visible.

Param	Type	Description
menuItems	`Array<object>`	An array of objects containing information about to generated Dropdown Menu items.

# beforeDropdownMenuShow

Source code

beforeDropdownMenuShow(dropdownMenu)

Fired by DropdownMenu plugin before opening the dropdown menu. This hook is fired when Options#dropdownMenu option is enabled.

Param	Type	Description
dropdownMenu	`DropdownMenu`	The DropdownMenu instance.

# beforeFilter

Source code

beforeFilter(conditionsStack) ⇒ boolean

Fired by Filters plugin before applying filtering. This hook is fired when Options#filters option is enabled.

Param	Type	Description
conditionsStack	`Array<object>`	An array of objects with added formulas. `js // Example format of the conditionsStack argument: [ { column: 2, conditions: [ {name: 'begins_with', args: [['S']]} ], operation: 'conjunction' }, { column: 4, conditions: [ {name: 'not_empty', args: []} ], operation: 'conjunction' }, ]`

Returns: boolean - If hook returns false value then filtering won't be applied on the UI side (server-side filtering).

# beforeGetCellMeta

Source code

beforeGetCellMeta(row, column, cellProperties)

Fired before getting cell settings.

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
cellProperties	`object`	Object containing the cell's properties.

# beforeHideColumns

Source code

beforeHideColumns(currentHideConfig, destinationHideConfig, actionPossible) ⇒ undefined | boolean

Fired by HiddenColumns plugin before marking the columns as hidden. Fired only if the Options#hiddenColumns option is enabled. Returning false in the callback will prevent the hiding action from completing.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical column indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical column indexes.
actionPossible	`boolean`	`true`, if the provided column indexes are valid, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the hiding action will not be completed.

# beforeHideRows

Source code

beforeHideRows(currentHideConfig, destinationHideConfig, actionPossible) ⇒ undefined | boolean

Fired by HiddenRows plugin before marking the rows as hidden. Fired only if the Options#hiddenRows option is enabled. Returning false in the callback will prevent the hiding action from completing.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical row indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical row indexes.
actionPossible	`boolean`	`true`, if provided row indexes are valid, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the hiding action will not be completed.

# beforeHighlightingColumnHeader

Source code

beforeHighlightingColumnHeader(column, headerLevel, highlightMeta) ⇒ number | undefined

Allows modify the visual column index that is used to retrieve the column header element (TH) before it's highlighted (proper CSS class names are added). Modifying the visual column index allows building a custom implementation of the nested headers feature or other features that require highlighting other DOM elements than that the rendering engine, by default, would have highlighted.

Since: 8.4.0

Param	Type	Description
column	`number`	Visual column index.
headerLevel	`number`	Row header level (0 = most distant to the table).
highlightMeta	`object`	An object that contains additional information about processed selection.

# beforeHighlightingRowHeader

Source code

beforeHighlightingRowHeader(row, headerLevel, highlightMeta) ⇒ number | undefined

Allows modify the visual row index that is used to retrieve the row header element (TH) before it's highlighted (proper CSS class names are added). Modifying the visual row index allows building a custom implementation of the nested headers feature or other features that require highlighting other DOM elements than that the rendering engine, by default, would have highlighted.

Since: 8.4.0

Param	Type	Description
row	`number`	Visual row index.
headerLevel	`number`	Column header level (0 = most distant to the table).
highlightMeta	`object`	An object that contains additional information about processed selection.

# beforeInit

Source code

beforeInit

Fired before the Handsontable instance is initiated.

# beforeInitWalkontable

Source code

beforeInitWalkontable(walkontableConfig)

Fired before the Walkontable instance is initiated.

Param	Type	Description
walkontableConfig	`object`	Walkontable configuration object.

# beforeKeyDown

Source code

beforeKeyDown(event)

Fired before keydown event is handled. It can be used to overwrite default key bindings.

Note: To prevent default behavior you need to call event.stopImmediatePropagation() in your beforeKeyDown handler.

Param	Type	Description
event	`Event`	Original DOM event.

# beforeLanguageChange

Source code

beforeLanguageChange(languageCode)

Fired before successful change of language (when proper language code was set).

Since: 0.35.0

Param	Type	Description
languageCode	`string`	New language code.

# beforeLoadData

Source code

beforeLoadData(sourceData, initialLoad, source) ⇒ Array

Fired before Handsontable's data gets modified by the loadData() method or the updateSettings() method.

Since: 8.0.0

Param	Type	Description
sourceData	`Array`	An array of arrays, or an array of objects, that contains Handsontable's data
initialLoad	`boolean`	A flag that indicates whether the data was loaded at Handsontable's initialization (`true`) or later (`false`)
source	`string`	The source of the call

Returns: Array - The returned array will be used as Handsontable's new dataset.

# beforeMergeCells

Source code

beforeMergeCells(cellRange, [auto])

Fired by MergeCells plugin before cell merging. This hook is fired when Options#mergeCells option is enabled.

Param	Type	Default	Description
cellRange	`CellRange`		Selection cell range.
[auto]	`boolean`	`false`	`optional` `true` if called automatically by the plugin.

# beforeOnCellContextMenu

Source code

beforeOnCellContextMenu(event, coords, TD)

Fired after the user clicked a cell, but before all the calculations related with it.

Since: 4.1.0

Param	Type	Description
event	`Event`	The `contextmenu` event object.
coords	`CellCoords`	Cell coords object containing the visual coordinates of the clicked cell.
TD	`HTMLTableCellElement`	TD element.

# beforeOnCellMouseDown

Source code

beforeOnCellMouseDown(event, coords, TD, controller)

Fired after the user clicked a cell, but before all the calculations related with it.

Param	Type	Description
event	`Event`	The `mousedown` event object.
coords	`CellCoords`	Cell coords object containing the visual coordinates of the clicked cell.
TD	`HTMLTableCellElement`	TD element.
controller	`object`	An object with properties `row`, `column` and `cell`. Each property contains a boolean value that allows or disallows changing the selection for that particular area.

# beforeOnCellMouseOut

Source code

beforeOnCellMouseOut(event, coords, TD)

Fired after the user moved cursor out from a cell, but before all the calculations related with it.

Param	Type	Description
event	`Event`	The `mouseout` event object.
coords	`CellCoords`	CellCoords object containing the visual coordinates of the leaved cell.
TD	`HTMLTableCellElement`	TD element.

# beforeOnCellMouseOver

Source code

beforeOnCellMouseOver(event, coords, TD, controller)

Fired after the user moved cursor over a cell, but before all the calculations related with it.

Param	Type	Description
event	`Event`	The `mouseover` event object.
coords	`CellCoords`	CellCoords object containing the visual coordinates of the clicked cell.
TD	`HTMLTableCellElement`	TD element.
controller	`object`	An object with properties `row`, `column` and `cell`. Each property contains a boolean value that allows or disallows changing the selection for that particular area.

# beforeOnCellMouseUp

Source code

beforeOnCellMouseUp(event, coords, TD)

Fired after the user clicked a cell.

Param	Type	Description
event	`Event`	The `mouseup` event object.
coords	`CellCoords`	Cell coords object containing the visual coordinates of the clicked cell.
TD	`HTMLTableCellElement`	TD element.

# beforePaste

Source code

beforePaste(data, coords) ⇒ *

Fired by CopyPaste plugin before values are pasted into table. This hook is fired when Options#copyPaste option is enabled.

Example

// To disregard a single row, remove it from array using data.splice(i, 1).
new Handsontable(example, {
  beforePaste: (data, coords) => {
    // data -> [[1, 2, 3], [4, 5, 6]]
    data.splice(0, 1);
    // data -> [[4, 5, 6]]
    // coords -> [{startRow: 0, startCol: 0, endRow: 1, endCol: 2}]
  }
});
// To cancel pasting, return false from the callback.
new Handsontable(example, {
  beforePaste: (data, coords) => {
    return false;
  }
});

Param	Type	Description
data	`Array<Array>`	An array of arrays which contains data to paste.
coords	`Array<object>`	An array of objects with ranges of the visual indexes (`startRow`, `startCol`, `endRow`, `endCol`) that correspond to the previously selected area.

Returns: * - If returns false then pasting is canceled.

# beforeRedo

Source code

beforeRedo(action) ⇒ * | boolean

Fired by UndoRedo plugin before the redo action. Contains information about the action that is being redone. This hook is fired when Options#undo option is enabled.

Param	Type	Description
action	`object`	The action object. Contains information about the action being redone. The `actionType` property of the object specifies the type of the action in a String format (e.g. `'remove_row'`).

Returns: * | boolean - If false is returned the action is canceled.

# beforeRedoStackChange

Source code

beforeRedoStackChange(undoneActions)

Fired by UndoRedo plugin before changing redo stack.

Since: 8.4.0

Param	Type	Description
undoneActions	`Array`	Stack of actions which may be redone.

# beforeRefreshDimensions

Source code

beforeRefreshDimensions(previousDimensions, currentDimensions, actionPossible) ⇒ undefined | boolean

Cancellable hook, called after resizing a window, but before redrawing a table.

Param	Type	Description
previousDimensions	`object`	Previous dimensions of the container.
currentDimensions	`object`	Current dimensions of the container.
actionPossible	`boolean`	`true`, if current and previous dimensions are different, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the refresh action will not be completed.

# beforeRemoveCellClassNames

Source code

beforeRemoveCellClassNames ⇒ Array<string> | undefined

Fired inside the Walkontable's refreshSelections method. Can be used to remove additional class names from all cells in the table.

Since: 0.38.1

Returns: Array<string> | undefined - Can return an Array of Strings. Each of these strings will act like class names to be removed from all the cells in the table.

# beforeRemoveCellMeta

Source code

beforeRemoveCellMeta(row, column, key, value) ⇒ * | boolean

Fired before cell meta is removed.

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
key	`string`	The removed meta key.
value	`*`	Value which is under removed key of cell meta.

Returns: * | boolean - If false is returned the action is canceled.

# beforeRemoveCol

Source code

beforeRemoveCol(index, amount, physicalColumns, [source]) ⇒ * | boolean

Fired before one or more columns are about to be removed.

Param	Type	Description
index	`number`	Visual index of starter column.
amount	`number`	Amount of columns to be removed.
physicalColumns	`Array<number>`	An array of physical columns removed from the data source.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

Returns: * | boolean - If false is returned the action is canceled.

# beforeRemoveRow

Source code

beforeRemoveRow(index, amount, physicalRows, [source]) ⇒ * | boolean

Fired when one or more rows are about to be removed.

Param	Type	Description
index	`number`	Visual index of starter row.
amount	`number`	Amount of rows to be removed.
physicalRows	`Array<number>`	An array of physical rows removed from the data source.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

Returns: * | boolean - If false is returned the action is canceled.

# beforeRender

Source code

beforeRender(isForced)

Fired before Handsontable's view-rendering engine updates the view.

The beforeRender event is fired right after the Handsontable business logic is executed and right before the rendering engine starts calling the Core logic, renderers, cell meta objects etc. to update the view.

Param	Type	Description
isForced	`boolean`	If set to `true`, the rendering gets triggered by a change of settings, a change of data, or a logic that needs a full Handsontable render cycle. If set to `false`, the rendering gets triggered by scrolling or moving the selection.

# beforeRenderer

Source code

beforeRenderer(TD, row, column, prop, value, cellProperties)

Fired before starting rendering the cell.

Param	Type	Description
TD	`HTMLTableCellElement`	Currently rendered cell's TD element.
row	`number`	Visual row index.
column	`number`	Visual column index.
prop	`string` `number`	Column property name or a column index, if datasource is an array of arrays.
value	`*`	Value of the rendered cell.
cellProperties	`object`	Object containing the cell's properties.

# beforeRowMove

Source code

beforeRowMove(movedRows, finalIndex, dropIndex, movePossible) ⇒ * | boolean

Fired by ManualRowMove plugin before changing the order of the visual indexes. This hook is fired when Options#manualRowMove option is enabled.

Param	Type	Description
movedRows	`Array`	Array of visual row indexes to be moved.
finalIndex	`number`	Visual row index, being a start index for the moved rows. Points to where the elements will be placed after the moving action. To check visualization of final index please take a look at documentation.
dropIndex	`number` `undefined`	Visual row index, being a drop index for the moved rows. Points to where we are going to drop the moved elements. To check visualization of drop index please take a look at documentation. It's `undefined` when `dragRows` function wasn't called.
movePossible	`boolean`	Indicates if it's possible to move rows to the desired position.

Returns: * | boolean - If false is returned the action is canceled.

# beforeRowResize

Source code

beforeRowResize(newSize, row, isDoubleClick) ⇒ number

Fired by ManualRowResize plugin before rendering the table with modified row sizes. This hook is fired when Options#manualRowResize option is enabled.

Param	Type	Description
newSize	`number`	Calculated new row height.
row	`number`	Visual index of the resized row.
isDoubleClick	`boolean`	Flag that determines whether there was a double-click.

Returns: number - Returns the new row size or undefined if row size should be calculated automatically.

# beforeSetCellMeta

Source code

beforeSetCellMeta(row, column, key, value) ⇒ * | boolean

Fired before cell meta is changed.

Since: 8.0.0

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
key	`string`	The updated meta key.
value	`*`	The updated meta value.

Returns: * | boolean - If false is returned the action is canceled.

# beforeSetRangeEnd

Source code

beforeSetRangeEnd(coords)

Fired before setting range is ended.

Param	Type	Description
coords	`CellCoords`	CellCoords instance.

# beforeSetRangeStart

Source code

beforeSetRangeStart(coords)

Fired before setting range is started.

Param	Type	Description
coords	`CellCoords`	CellCoords instance.

# beforeSetRangeStartOnly

Source code

beforeSetRangeStartOnly(coords)

Fired before setting range is started but not finished yet.

Param	Type	Description
coords	`CellCoords`	CellCoords instance.

# beforeStretchingColumnWidth

Source code

beforeStretchingColumnWidth(stretchedWidth, column) ⇒ number

Fired before applying stretched column width to column.

Param	Type	Description
stretchedWidth	`number`	Calculated width.
column	`number`	Visual column index.

Returns: number - Returns new width which will be applied to the column element.

# beforeTouchScroll

Source code

beforeTouchScroll

Fired before the logic of handling a touch scroll, when user started scrolling on a touch-enabled device.

# beforeTrimRow

Source code

beforeTrimRow(currentTrimConfig, destinationTrimConfig, actionPossible) ⇒ undefined | boolean

Fired by TrimRows plugin before trimming rows. This hook is fired when Options#trimRows option is enabled.

Param	Type	Description
currentTrimConfig	`Array`	Current trim configuration - a list of trimmed physical row indexes.
destinationTrimConfig	`Array`	Destination trim configuration - a list of trimmed physical row indexes.
actionPossible	`boolean`	`true`, if all of the row indexes are withing the bounds of the table, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the trimming action will not be completed.

# beforeUndo

Source code

beforeUndo(action) ⇒ * | boolean

Fired by UndoRedo plugin before the undo action. Contains information about the action that is being undone. This hook is fired when Options#undo option is enabled.

Param	Type	Description
action	`object`	The action object. Contains information about the action being undone. The `actionType` property of the object specifies the type of the action in a String format. (e.g. `'remove_row'`).

Returns: * | boolean - If false is returned the action is canceled.

# beforeUndoStackChange

Source code

beforeUndoStackChange(doneActions, [source]) ⇒ * | boolean

Fired by UndoRedo plugin before changing undo stack.

Since: 8.4.0

Param	Type	Description
doneActions	`Array`	Stack of actions which may be undone.
[source]	`string`	`optional` String that identifies source of action (list of all available sources).

Returns: * | boolean - If false is returned the action of changing undo stack is canceled.

# beforeUnhideColumns

Source code

beforeUnhideColumns(currentHideConfig, destinationHideConfig, actionPossible) ⇒ undefined | boolean

Fired by HiddenColumns plugin before marking the columns as not hidden. Fired only if the Options#hiddenColumns option is enabled. Returning false in the callback will prevent the column revealing action from completing.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical column indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical column indexes.
actionPossible	`boolean`	`true`, if the provided column indexes are valid, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the hiding action will not be completed.

# beforeUnhideRows

Source code

beforeUnhideRows(currentHideConfig, destinationHideConfig, actionPossible) ⇒ undefined | boolean

Fired by HiddenRows plugin before marking the rows as not hidden. Fired only if the Options#hiddenRows option is enabled. Returning false in the callback will prevent the row revealing action from completing.

Param	Type	Description
currentHideConfig	`Array`	Current hide configuration - a list of hidden physical row indexes.
destinationHideConfig	`Array`	Destination hide configuration - a list of hidden physical row indexes.
actionPossible	`boolean`	`true`, if provided row indexes are valid, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the revealing action will not be completed.

# beforeUnmergeCells

Source code

beforeUnmergeCells(cellRange, [auto])

Fired by MergeCells plugin before unmerging the cells. This hook is fired when Options#mergeCells option is enabled.

Param	Type	Default	Description
cellRange	`CellRange`		Selection cell range.
[auto]	`boolean`	`false`	`optional` `true` if called automatically by the plugin.

# beforeUntrimRow

Source code

beforeUntrimRow(currentTrimConfig, destinationTrimConfig, actionPossible) ⇒ undefined | boolean

Fired by TrimRows plugin before untrimming rows. This hook is fired when Options#trimRows option is enabled.

Param	Type	Description
currentTrimConfig	`Array`	Current trim configuration - a list of trimmed physical row indexes.
destinationTrimConfig	`Array`	Destination trim configuration - a list of trimmed physical row indexes.
actionPossible	`boolean`	`true`, if all of the row indexes are withing the bounds of the table, `false` otherwise.

Returns: undefined | boolean - If the callback returns false, the untrimming action will not be completed.

# beforeUpdateData

Source code

beforeUpdateData(sourceData, initialLoad, source) ⇒ Array

Fired before the updateData() method modifies Handsontable's data.

Since: 11.1.0

Param	Type	Description
sourceData	`Array`	An array of arrays, or an array of objects, that contains Handsontable's data
initialLoad	`boolean`	A flag that indicates whether the data was loaded at Handsontable's initialization (`true`) or later (`false`)
source	`string`	The source of the call

Returns: Array - The returned array will be used as Handsontable's new dataset.

# beforeValidate

Source code

beforeValidate(value, row, prop, [source])

Fired before cell validation, only if validator function is defined. This can be used to manipulate the value of changed cell before it is applied to the validator function.

Note: this will not affect values of changes. This will change value ONLY for validation.

Param	Type	Description
value	`*`	Value of the cell.
row	`number`	Visual row index.
prop	`string` `number`	Property name / column index.
[source]	`string`	`optional` String that identifies source of hook call (list of all available sources).

# beforeValueRender

Source code

beforeValueRender(value, cellProperties)

Fired before cell value is rendered into the DOM (through renderer function). This can be used to manipulate the value which is passed to the renderer without modifying the renderer itself.

Param	Type	Description
value	`*`	Cell value to render.
cellProperties	`object`	An object containing the cell properties.

# beforeViewRender

Source code

beforeViewRender(isForced, skipRender)

Fired before Handsontable's view-rendering engine is rendered.

Note: In Handsontable 9.x and earlier, the beforeViewRender hook was named beforeRender.

Since: 10.0.0

Param	Type	Description
isForced	`boolean`	If set to `true`, the rendering gets triggered by a change of settings, a change of data, or a logic that needs a full Handsontable render cycle. If set to `false`, the rendering gets triggered by scrolling or moving the selection.
skipRender	`object`	Object with `skipRender` property, if it is set to `true` the next rendering cycle will be skipped.

# construct

Source code

construct

Fired after Handsontable instance is constructed (using new operator).

# init

Source code

init

Fired after Handsontable instance is initiated but before table is rendered.

# modifyAutoColumnSizeSeed

Source code

modifyAutoColumnSizeSeed(seed, cellProperties, cellValue)

Fired by AutoColumnSize plugin within SampleGenerator utility.

Since: 8.4.0

Param	Type	Description
seed	`string` `undefined`	Seed ID, unique name to categorize samples.
cellProperties	`object`	Object containing the cell properties.
cellValue	`*`	Value of the cell.

# modifyAutofillRange

Source code

modifyAutofillRange(startArea, entireArea)

Fired by Autofill plugin after setting range of autofill. This hook is fired when Options#fillHandle option is enabled.

Param	Type	Description
startArea	`Array`	Array of visual coordinates of the starting point for the drag-down operation (`[startRow, startColumn, endRow, endColumn]`).
entireArea	`Array`	Array of visual coordinates of the entire area of the drag-down operation (`[startRow, startColumn, endRow, endColumn]`).

# modifyColHeader

Source code

modifyColHeader(column)

Fired when a column header index is about to be modified by a callback function.

Param	Type	Description
column	`number`	Visual column header index.

# modifyColumnHeaderHeight

Source code

modifyColumnHeaderHeight

Fired while retrieving the column header height.

# modifyColWidth

Source code

modifyColWidth(width, column)

Fired when a column width is about to be modified by a callback function.

Param	Type	Description
width	`number`	Current column width.
column	`number`	Visual column index.

# modifyCopyableRange

Source code

modifyCopyableRange(copyableRanges)

Fired to allow modifying the copyable range with a callback function.

Param	Type	Description
copyableRanges	`Array<Array>`	Array of objects defining copyable cells.

# modifyData

Source code

modifyData(row, column, valueHolder, ioMode)

Fired when a data was retrieved or modified.

Param	Type	Description
row	`number`	Physical row height.
column	`number`	Physical column index.
valueHolder	`object`	Object which contains original value which can be modified by overwriting `.value` property.
ioMode	`string`	String which indicates for what operation hook is fired (`get` or `set`).

# modifyGetCellCoords

Source code

modifyGetCellCoords(row, column, topmost)

Used to modify the cell coordinates when using the getCell method, opening editor, getting value from the editor and saving values from the closed editor.

Since: 0.36.0

Param	Type	Description
row	`number`	Visual row index.
column	`number`	Visual column index.
topmost	`boolean`	If set to `true`, it returns the TD element from the topmost overlay. For example, if the wanted cell is in the range of fixed rows, it will return a TD element from the `top` overlay.

# modifyRowData

Source code

modifyRowData(row)

Fired when a data was retrieved or modified.

Param	Type	Description
row	`number`	Physical row index.

# modifyRowHeader

Source code

modifyRowHeader(row)

Fired when a row header index is about to be modified by a callback function.

Param	Type	Description
row	`number`	Visual row header index.

# modifyRowHeaderWidth

Source code

modifyRowHeaderWidth(rowHeaderWidth)

Fired while retrieving the row header width.

Param	Type	Description
rowHeaderWidth	`number`	Row header width.

# modifyRowHeight

Source code

modifyRowHeight(height, row)

Fired when a row height is about to be modified by a callback function.

Param	Type	Description
height	`number`	Row height.
row	`number`	Visual row index.

# modifySourceData

Source code

modifySourceData(row, column, valueHolder, ioMode)

Fired when a data was retrieved or modified from the source data set.

Since: 8.0.0

Param	Type	Description
row	`number`	Physical row index.
column	`number`	Physical column index.
valueHolder	`object`	Object which contains original value which can be modified by overwriting `.value` property.
ioMode	`string`	String which indicates for what operation hook is fired (`get` or `set`).

# modifyTransformEnd

Source code

modifyTransformEnd(delta)

Fired when the end of the selection is being modified (e.g. Moving the selection with the arrow keys).

Param	Type	Description
delta	`CellCoords`	Cell coords object declaring the delta of the new selection relative to the previous one.

# modifyTransformStart

Source code

modifyTransformStart(delta)

Fired when the start of the selection is being modified (e.g. Moving the selection with the arrow keys).

Param	Type	Description
delta	`CellCoords`	Cell coords object declaring the delta of the new selection relative to the previous one.

# persistentStateLoad

Source code

persistentStateLoad(key, valuePlaceholder)

Fired by PersistentState plugin, after loading value, saved under given key, from browser local storage. This hook is fired when Options#persistentState option is enabled.

Param	Type	Description
key	`string`	Key.
valuePlaceholder	`object`	Object containing the loaded value under `valuePlaceholder.value` (if no value have been saved, `value` key will be undefined).

# persistentStateReset

Source code

persistentStateReset([key])

Fired by PersistentState plugin after resetting data from local storage. If no key is given, all values associated with table will be cleared. This hook is fired when Options#persistentState option is enabled.

Param	Type	Description
[key]	`string`	`optional` Key.

# persistentStateSave

Source code

persistentStateSave(key, value)

Fired by PersistentState plugin, after saving value under given key in browser local storage. This hook is fired when Options#persistentState option is enabled.

Param	Type	Description
key	`string`	Key.
value	`Mixed`	Value to save.

# Methods

# add

Source code

hooks.add(key, callback, [context]) ⇒ Hooks

Adds a listener (globally or locally) to a specified hook name. If the context parameter is provided, the hook will be added only to the instance it references. Otherwise, the callback will be used everytime the hook fires on any Handsontable instance. You can provide an array of callback functions as the callback argument, this way they will all be fired once the hook is triggered.

See: Core#addHook Example

// single callback, added locally
Handsontable.hooks.add('beforeInit', myCallback, hotInstance);

// single callback, added globally
Handsontable.hooks.add('beforeInit', myCallback);

// multiple callbacks, added locally
Handsontable.hooks.add('beforeInit', [myCallback, anotherCallback], hotInstance);

// multiple callbacks, added globally
Handsontable.hooks.add('beforeInit', [myCallback, anotherCallback]);

Param	Type	Default	Description
key	`string`		Hook name.
callback	`function` `Array`		Callback function or an array of functions.
[context]	`object`	`null`	`optional` The context for the hook callback to be added - a Handsontable instance or leave empty.

Returns: Hooks - Instance of Hooks.

# createEmptyBucket

Source code

hooks.createEmptyBucket() ⇒ object

Returns a new object with empty handlers related to every registered hook name.

Example

Handsontable.hooks.createEmptyBucket();
// Results:
{
...
afterCreateCol: [],
afterCreateRow: [],
beforeInit: [],
...
}

Returns: object - The empty bucket object.

# deregister

Source code

hooks.deregister(key)

Deregisters a hook name (removes it from the list of known hook names).

Example

Handsontable.hooks.deregister('myHook');

Param	Type	Description
key	`string`	The hook name.

# destroy

Source code

hooks.destroy([context])

Destroy all listeners connected to the context. If no context is provided, the global listeners will be destroyed.

Example

// destroy the global listeners
Handsontable.hooks.destroy();

// destroy the local listeners
Handsontable.hooks.destroy(hotInstance);

Param	Type	Default	Description
[context]	`object`	`null`	`optional` A Handsontable instance.

# getBucket

Source code

hooks.getBucket([context]) ⇒ object

Get hook bucket based on the context of the object or if argument is undefined, get the global hook bucket.

Param	Type	Default	Description
[context]	`object`	`null`	`optional` A Handsontable instance.

Returns: object - Returns a global or Handsontable instance bucket.

# getRegistered

Source code

hooks.getRegistered() ⇒ Array

Returns an array of registered hooks.

Example

Handsontable.hooks.getRegistered();

// Results:
[
...
  'beforeInit',
  'beforeRender',
  'beforeSetRangeEnd',
  'beforeDrawBorders',
  'beforeChange',
...
]

Returns: Array - An array of registered hooks.

# has

Source code

hooks.has(key, [context]) ⇒ boolean

Checks whether there are any registered listeners for the provided hook name. If the context parameter is provided, it only checks for listeners assigned to the given Handsontable instance.

Param	Type	Default	Description
key	`string`		Hook name.
[context]	`object`	`null`	`optional` A Handsontable instance.

Returns: boolean - true for success, false otherwise.

# isDeprecated

Source code

hooks.isDeprecated(hookName) ⇒ boolean

Returns a boolean value depending on if a hook by such name has been removed or deprecated.

Example

Handsontable.hooks.isDeprecated('skipLengthCache');

// Results:
true

Param	Type	Description
hookName	`string`	The hook name to check.

Returns: boolean - Returns true if the provided hook name was marked as deprecated or removed from API, false otherwise.

# isRegistered

Source code

hooks.isRegistered(hookName) ⇒ boolean

Returns a boolean depending on if a hook by such name has been registered.

Example

Handsontable.hooks.isRegistered('beforeInit');

// Results:
true

Param	Type	Description
hookName	`string`	The hook name to check.

Returns: boolean - true for success, false otherwise.

# once

Source code

hooks.once(key, callback, [context])

Adds a listener to a specified hook. After the hook runs this listener will be automatically removed from the bucket.

See: Core#addHookOnce Example

Handsontable.hooks.once('beforeInit', myCallback, hotInstance);

Param	Type	Default	Description
key	`string`		Hook/Event name.
callback	`function` `Array`		Callback function.
[context]	`object`	`null`	`optional` A Handsontable instance.

# register

Source code

hooks.register(key)

Registers a hook name (adds it to the list of the known hook names). Used by plugins. It is not necessary to call register, but if you use it, your plugin hook will be used returned by the getRegistered method. (which itself is used in the demo).

Example

Handsontable.hooks.register('myHook');

Param	Type	Description
key	`string`	The hook name.

# remove

Source code

hooks.remove(key, callback, [context]) ⇒ boolean

Removes a listener from a hook with a given name. If the context argument is provided, it removes a listener from a local hook assigned to the given Handsontable instance.

See: Core#removeHook Example

Handsontable.hooks.remove('beforeInit', myCallback);

Param	Type	Default	Description
key	`string`		Hook/Event name.
callback	`function`		Callback function (needs the be the function that was previously added to the hook).
[context]	`object`	`null`	`optional` Handsontable instance.

Returns: boolean - Returns true if hook was removed, false otherwise.

# run

Source code

hooks.run(context, key, [p1], [p2], [p3], [p4], [p5], [p6]) ⇒ *

Runs all local and global callbacks assigned to the hook identified by the key parameter. It returns either a return value from the last called callback or the first parameter (p1) passed to the run function.

See: Core#runHooks Example

Handsontable.hooks.run(hot, 'beforeInit');

Param	Type	Description
context	`object`	Handsontable instance.
key	`string`	Hook/Event name.
[p1]	`*`	`optional` Parameter to be passed as an argument to the callback function.
[p2]	`*`	`optional` Parameter to be passed as an argument to the callback function.
[p3]	`*`	`optional` Parameter to be passed as an argument to the callback function.
[p4]	`*`	`optional` Parameter to be passed as an argument to the callback function.
[p5]	`*`	`optional` Parameter to be passed as an argument to the callback function.
[p6]	`*`	`optional` Parameter to be passed as an argument to the callback function.

Returns: * - Either a return value from the last called callback or p1.

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