This plugin allows to set row heights based on their highest cells.

By default, the plugin is declared as undefined, which makes it disabled (same as if it was declared as false).
Enabling this plugin may decrease the overall table performance, as it needs to calculate the heights of all cells to
resize the rows accordingly.
If you experience problems with the performance, try turning this feature off and declaring the row heights manually.

Row height calculations are divided into sync and async part. Each of this parts has their own advantages and
disadvantages. Synchronous calculations are faster but they block the browser UI, while the slower asynchronous
operations don't block the browser UI.

To configure the sync/async distribution, you can pass an absolute value (number of columns) or a percentage value to a config object:

// as a number (300 columns in sync, rest async)
autoRowSize: {syncLimit: 300},.

// as a string (percent)
autoRowSize: {syncLimit: '40%'},.

// allow sample duplication
autoRowSize: {syncLimit: '40%', allowSampleDuplicates: true},

You can also use the `allowSampleDuplicates` option to allow sampling duplicate values when calculating the row
height. __Note__, that this might have a negative impact on performance.

To configure this plugin see Options#autoRowSize.
const hot = new Handsontable(document.getElementById('example'), {
  date: getData(),
  autoRowSize: true
// Access to plugin instance:
const plugin = hot.getPlugin('autoRowSize');


if (plugin.isEnabled()) {
  // code...



true if the size calculation is in progress.


Number of already measured rows (we already know their sizes).



Calculate all rows heights. The calculated row will be cached in the AutoRowSize#heights property.
To retrieve height for specified row use AutoRowSize#getRowHeight method.

Name Type Description
colRange object | number

Row index or an object with from and to properties which define row range.

calculateRowsHeight(rowRange, colRange, force)

Calculate a given rows height.

Name Type Default Description
rowRange number | object

Row index or an object with from and to indexes as a range.

colRange number | object

Column index or an object with from and to indexes as a range.

force boolean false optional

If true the calculation will be processed regardless of whether the width exists in the cache.


Clears cached heights.


Clears cache by range.

Name Type Description
range object | number

Row index or an object with from and to properties which define row range.


Destroys the plugin instance.


Disables the plugin functionality for this Handsontable instance.


Enables the plugin functionality for this Handsontable instance.


Get the calculated column header height.

Returns: {number|undefined}


Get the first visible row.

Returns: {number} Returns row index, -1 if table is not rendered or if there are no rows to base the the calculations on.


Gets the last visible row.

Returns: {number} Returns row index or -1 if table is not rendered.

getRowHeight(row, defaultHeight){number}

Gets the calculated row height.

Name Type Description
row number

Visual row index.

defaultHeight number optional

Default row height. It will be picked up if no calculated height found.

Returns: {number}


Gets value which tells how many rows should be calculated synchronously (rest of the rows will be calculated
asynchronously). The limit is calculated based on syncLimit set to autoRowSize option (see Options#autoRowSize).

Returns: {number}


Checks if the plugin is enabled in the handsontable settings. This method is executed in Hooks#beforeInit
hook and if it returns true than the AutoRowSize#enablePlugin method is called.

Returns: {boolean}


Checks if all heights were calculated. If not then return true (need recalculate).

Returns: {boolean}


Recalculates all rows height (overwrite cache values).

Class: AutoRowSize