# Modules

# Overview

The full bundle of Handsontable consists of multiple built-in modules such as plugins, renderers, editors, validators, and cell-types. It also includes the whole rendering functionality and advanced data management. This is a compact tool with plenty of options available.

When you become familiar with Handsontable functionalities you may find out that some parts of it are essential in your application and some of them stay idle most of the time.

Thanks to modules (opens new window) the package could be split into smaller pieces and you can import them as you need. Essentialy it was divided into two: the base and the optional part. The base of Handsontable holds mandatory parts packed inside handsontable/base, and it includes vital parts for the component to run. The rest is customizable based on what you want to import. A mindful use of the modules brings a lot of optimization to the application, yet, it only needs several lines of code.

The graph presents a comparison of size in KB for a full bundle, basic optimization and with optimized locales. The sample code is avaiable just below - it shows sample countries and cities and although it looks small it will generate over 345 KB (Gzipped). Webpack 5 (opens new window) with a default configuration for production builds was used to prepare this example.

bundle_size_comparison

You can compare the following examples to see the difference in the size of the final build. Note: this is an example in a nutshell, just to present a comparison, the next section shows how to do it step by step. First, take a look at the settings, it is the same object in both cases:

const settings = {
  colHeaders: true,
  filters: true,
  data: [
    {
      city: 'Fontainebleau',
      country: 'France',
    },
    {
      city: 'Milton',
      country: 'United Kingdom',
    },
    {
      city: 'Giedlarowa',
      country: 'Poland',
    },
    {
      city: 'Forssa',
      country: 'Finland',
    },
    {
      city: 'Halle',
      country: 'Germany',
    }
  ],
  dropdownMenu: true,
  columns: [
    { data: 'city' },
    {
      data: 'country',
      type: 'dropdown',
      source: ['Finland', 'France', 'Germany', 'Poland', 'United Kingdom'],
    },
  ]
}

As you can see, very few plugins are used here: filtering and the dropdown. You can import a full bundle that contains all parts of Handsontable, including a variety of plugins:

// import a full bundle, all functionalities included
import Handsontable from 'handsontable';

const container = document.createElement('div');
document.body.appendChild(container);

const hot = new Handsontable(container, settings);

However, this will load all plugins, also those that remain unused in the example. Thanks to using modules you can achieve the exactly same result but it will generate less KB. These steps decreased the final bundle to 200 KB (Gzipped):

// import the base only
import Handsontable from 'handsontable/base';
// choose cell types you want to use and import them
import { registerCellType, DropdownCellType } from 'handsontable/cellTypes';
// choose plugins you want to use and import them
import {
  registerPlugin,
  AutoColumnSize,
  CopyPaste,
  Filters,
} from 'handsontable/plugins';

// register imported cell types and plugins
registerCellType(DropdownCellType);
registerPlugin(AutoColumnSize);
registerPlugin(CopyPaste);
registerPlugin(Filters);

// the rest of code remain exactly same as in the previous example!
const container = document.createElement('div');
document.body.appendChild(container);

const hot = new Handsontable(container, settings);

You can go even further and optimize moment.js locales by excluding unnecessary localizations and decrease the final bundle of the example to 150 KB (Gzipped). Eventually, over 56% of the final bundle size was saved!

# How to use modules

The very first step towards using the modules is learning which independent parts you can import and which of them are mandatory. First, you need to import the base which contains the core elements of the component. Without them, Handsontable cannot be built at all:

// this part is crucial to be imported
import Handsontable from 'handsontable/base';

// import the css file - this is not modularized;
import 'handsontable/dist/handsontable.full.css';

If you had already an import of Handsontable just remove this line:

// you no longer need this import
import Handsontable from 'handsontable';

The Handsontable base part includes:

  • moment.js
  • dompurify
  • core-js
  • core functionalities
  • "text" cell type

Having this set up you can acknowledge which elements you can import as needed.

Elements to be imported manually on demand:

  • plugins
  • editors
  • renderers
  • validators
  • cell types
  • locales

The use cases may wary greatly, this guide will go through the categories and present one example for each.

# Importing plugins

To use a specific plugin you need to import it alongside the registering method. For instance, let's try adding the context menu.

Start with importing the base, ContextMenu and the registerPlugin method.

// remember to have the base imported
import Handsontable from 'handsontable/base';
// import the method for registering a plugin
// import the ContextMenu plugin
import { registerPlugin, ContextMenu } from 'handsontable/plugins';

Afterwards you need to use the registerPlugin method to register the ContextMenu plugin:

// register the plugin before using it
registerPlugin(ContextMenu);

Now, you can use the ContextMenu plugin, the full example looks like this:

import Handsontable from 'handsontable/base';
import { registerPlugin, AutoColumnSize, ContextMenu } from 'handsontable/plugins';

registerPlugin(AutoColumnSize);
registerPlugin(ContextMenu);

// switch the context menu on
new Handsontable(container, {
  contextMenu: true,
  // rest of the settings
});

And that is all! You can use the ContextMenu plugin.

# Importing editors

To use a specific editor you need to import it alongside the registering method. For instance, let's try adding the password editor.

Start with importing the base, PasswordEditor and the registerEditor method.

// remember to have the base imported
import Handsontable from 'handsontable/base';
// import the method for registering an editor
// import the PasswordEditor
import { registerEditor, PasswordEditor } from 'handsontable/editors';

Afterwards you need to use the registerEditor method to register PasswordEditor:

// register the editor before using it
registerEditor(PasswordEditor);

Now, you can use PasswordEditor, the full example looks like this:

import Handsontable from 'handsontable/base';
import { registerEditor, PasswordEditor } from 'handsontable/editors';

registerEditor(PasswordEditor);

// use the editor as needed
new Handsontable(container, {
  columns: [
    {
      editor: 'password',
    },
  ]
  // rest of the settings
});

And that is all! You can use the password editor!

# Importing renderers

To use a specific renderer you need to import it alongside the registering method. For instance, let's try adding the autocomplete renderer.

Start with importing the base, autocompleteRenderer and the registerRenderer method.

// remember to have the base imported
import Handsontable from 'handsontable/base';
// import the method for registering a renderer
// import the autocompleteRenderer
import { registerRenderer, autocompleteRenderer } from 'handsontable/renderers';

Afterwards you need to use the registerRenderer method to register autocompleteRenderer:

// register the renderer before using it
registerRenderer(autocompleteRenderer);

Now, you can use autocompleteRenderer, the full example looks like this:

import Handsontable from 'handsontable/base';
import { registerRenderer, autocompleteRenderer } from 'handsontable/renderers';

registerRenderer(autocompleteRenderer);

// use the renderer as you need
new Handsontable(container, {
  columns: [
    {
      renderer: 'autocomplete',
    },
  ],
// rest of the settings
});

And that is all! You can use the autocomplete renderer!

# Importing validators

To use a specific validator you need to import it alongside the registering method. For instance, let's try adding the numeric validator.

Start with importing the base, numericValidator and the registerValidator method.

// remember to have the base imported
import Handsontable from 'handsontable/base';

// import the method for registering a validator
// import the numericValidator
import { registerValidator, numericValidator } from 'handsontable/validators';

Afterwards you need to use the registerValidator method to register numericValidator:

// register the validator before using it
registerValidator(numericValidator);

Now, you can use numericValidator, the full example looks like this:

import Handsontable from 'handsontable/base';
import { registerValidator, numericValidator } from 'handsontable/validators';

registerValidator(numericValidator);

// use the numeric validator where you need
new Handsontable(container, {
  columns: [
    {
      validator: 'numeric',
    },
  ]
// rest of the settings
});

And that is all! You can use the numeric validator!

# Importing cell types

To use a specific cell type you need to import it alongside the registering method. Let's try adding the checkbox cell type.

Start with importing the base, CheckboxCellType and the registerCellType method.

// remember to have the base imported
import Handsontable from 'handsontable/base';
// import the method for registering a cell type
// import the CheckboxCellType
import { registerCellType, CheckboxCellType } from 'handsontable/cellTypes';

Afterwards you need to use the registerCellType method to register CheckboxCellType:

// register the cell type before using it
registerCellType(CheckboxCellType);

Now, you can use CheckboxCellType, the full example looks like this:

import Handsontable from 'handsontable/base';
import { registerCellType, CheckboxCellType } from 'handsontable/cellTypes';

registerCellType(CheckboxCellType);

// use the checkbox cell type where you need
new Handsontable(container, {
  columns: [
    {
      type: 'checkbox',
    },
  ]
// rest of the settings
});

And that is all! You can use the checkbox cell type!

# Importing locales

Importing locales works slightly different than in case of other elements. Let's try adding the pl-PL locale.

Start with importing the base and the language code:

// remember to have the base imported
import Handsontable from 'handsontable/base';

// import the language code and interface to register language
import { registerLanguageDictionary, plPL } from 'handsontable/i18n';

Afterwards you need to register it:

registerLanguageDictionary(plPL.languageCode, plPL);

// or if the language dictionary object contains the "languageCode" property,
// the registration can be simplified to something like this
registerLanguageDictionary(plPL);

Now, you can use newly registered locale. The full example looks like this:

import Handsontable from 'handsontable/base';
import { registerLanguageDictionary, plPL } from 'handsontable/i18n';

registerLanguageDictionary(plPL);

// use the locales
new Handsontable(container, {
  language: 'pl-PL',
// rest of the settings
});

And that is all! You can use the PL-pl locale!

# Optimizing moment.js locales

If you want to decrease the bundle size even more you can also focus on optimizing moment.js locales. There are different methods of doing so but this guide focuses on using the webpack's IgnorePlugin (opens new window). For another option, you can check this tutorial (opens new window) directly.

Moment.js can be heavyweight because when you type var moment = require('moment') in the code you get all locales as default. To be more selective with your choice you can first, use the IgnorePlugin that removes all locales:

const webpack = require('webpack');
module.exports = {
  //...
  plugins: [
    // Ignore all locale files of moment.js
    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
  ],
};

And then explicitly load selected locales:

import moment from 'moment';
import 'moment/locale/ja';
import Handsontable from 'handsontable/base';
import { registerCellType, DateCellType } from 'handsontable/cellTypes';

moment.locale('ja');
registerCellType(DateCellType);

new Handsontable(container, {
  type: 'date',
});

# Using with wrappers

It is not yet possible to use modules alongside the wrappers.

# Tree shaking

Tree shaking, also called dead code elimination, allows for the removal of unused code in the bundle during the build process.

The terms came in 2012, and currently, you can use them in most of the available and popular bundlers such as webpack, rollup, parceljs (with an additional flag), and browserify.

If you want to learn more about this topic, don't hesitate to look at the official documentation of Webpack (opens new window), Rollup (opens new window), and Parcel (opens new window).

Important note: this guide was prepared based on the newest version of Webpack. For the Webpack 3 and older, Parcel, and few other bundlers, those load CommonJS modules, three shaking might not work as presented above. For the modules to be imported correctly you need to split them and import them one by one from their respective files, just like this:

// import the registering method directly from the file
import { registerPlugin } from 'handsontable/plugins/registry';

// import the plugins you need
import { DropdownMenu } from 'handsontable/plugins/dropdownMenu';
import { ContextMenu } from 'handsontable/plugins/contextMenu';

The list below presents all registering methods and their files of origin alongside all parts of the component to be imported.

See the full list
import { registerEditor } from 'handsontable/editors/registry';
import { AutocompleteEditor } from 'handsontable/editors/autocompleteEditor';
import { BaseEditor } from 'handsontable/editors/baseEditor';
import { CheckboxEditor } from 'handsontable/editors/checkboxEditor';
import { DateEditor } from 'handsontable/editors/dateEditor';
import { DropdownEditor } from 'handsontable/editors/dropdownEditor';
import { HandsontableEditor } from 'handsontable/editors/handsontableEditor';
import { NumericEditor } from 'handsontable/editors/numericEditor';
import { PasswordEditor } from 'handsontable/editors/passwordEditor';
import { SelectEditor } from 'handsontable/editors/selectEditor';
import { TextEditor } from 'handsontable/editors/textEditor';

import { registerCellType } from 'handsontable/cellTypes/registry';
import { AutocompleteCellType } from 'handsontable/cellTypes/autocompleteType';
import { CheckboxCellType } from 'handsontable/cellTypes/checkboxType';
import { DateCellType } from 'handsontable/cellTypes/dateType';
import { DropdownCellType } from 'handsontable/cellTypes/dropdownType';
import { HandsontableCellType } from 'handsontable/cellTypes/handsontableType';
import { NumericCellType } from 'handsontable/cellTypes/numericType';
import { PasswordCellType } from 'handsontable/cellTypes/passwordType';
import { TextCellType } from 'handsontable/cellTypes/textType';
import { TimeCellType } from 'handsontable/cellTypes/timeType';

import { registerPlugin } from 'handsontable/plugins/registry';
import { AutoColumnSize } from 'handsontable/plugins/autoColumnSize';
import { Autofill } from 'handsontable/plugins/autofill';
import { AutoRowSize } from 'handsontable/plugins/autoRowSize';
import { BasePlugin } from 'handsontable/plugins/base';
import { BindRowsWithHeaders } from 'handsontable/plugins/bindRowsWithHeaders';
import { CollapsibleColumns } from 'handsontable/plugins/collapsibleColumn';
import { ColumnSorting } from 'handsontable/plugins/columnSorting';
import { Comments } from 'handsontable/plugins/comments';
import { ContextMenu } from 'handsontable/plugins/contextMenu';
import { CopyPaste } from 'handsontable/plugins/copyPaste';
import { CustomBorders } from 'handsontable/plugins/customBorders';
import { DragToScroll } from 'handsontable/plugins/dragToScroll';
import { DropdownMenu } from 'handsontable/plugins/dropdownMenu';
import { ExportFile } from 'handsontable/plugins/exportFile';
import { Filters } from 'handsontable/plugins/filters';
import { HeaderTooltips } from 'handsontable/plugins/headerTooltips';
import { HiddenColumns } from 'handsontable/plugins/hiddenColumns';
import { HiddenRows } from 'handsontable/plugins/hiddenRows';
import { ManualColumnFreeze } from 'handsontable/plugins/manualColumnFreeze';
import { ManualColumnMove } from 'handsontable/plugins/manualColumnMove';
import { ManualColumnResize } from 'handsontable/plugins/manualColumnResize';
import { ManualRowMove } from 'handsontable/plugins/manualRowMove';
import { ManualRowResize } from 'handsontable/plugins/manualRowResize';
import { MergeCells } from 'handsontable/plugins/mergeCells';
import { MultipleSelectionHandles } from 'handsontable/plugins/multipleSelectionHandles';
import { NestedHeaders } from 'handsontable/plugins/nestedHeaders';
import { NestedRows } from 'handsontable/plugins/nestedRows';
import { ObserveChanges } from 'handsontable/plugins/observeChanges';
import { PersistentState } from 'handsontable/plugins/persistentState';
import { Search } from 'handsontable/plugins/search';
import { TouchScroll } from 'handsontable/plugins/touchScroll';
import { TrimRows } from 'handsontable/plugins/trimRows';
import { UndoRedo } from 'handsontable/plugins/undoRedo';

import { registerRenderer } from 'handsontable/renderers/registry';
import { autocompleteRenderer } from 'handsontable/renderers/autocompleteRenderer';
import { baseRenderer } from 'handsontable/renderers/baseRenderer';
import { checkboxRenderer } from 'handsontable/renderers/checkboxRenderer';
import { htmlRenderer } from 'handsontable/renderers/htmlRenderer';
import { numericRenderer } from 'handsontable/renderers/numericRenderer';
import { passwordRenderer } from 'handsontable/renderers/passwordRenderer';
import { textRenderer } from 'handsontable/renderers/textRenderer';

import { registerValidator } from 'handsontable/validators/registry';
import { autocompleteValidator } from 'handsontable/validators/autocompleteValidator';
import { dateValidator } from 'handsontable/validators/dateValidator';
import { numericValidator } from 'handsontable/validators/numericValidator';
import { timeValidator } from 'handsontable/validators/timeValidator';

import { registerLanguageDictionary } from 'handsontable/i18n/registry';

# Modules cheatsheet

Here is an extensive list of all Handsontable parts imported and registered. This example builds Handsontable out of all fragments. You can copy and paste the ones you need.

import Handsontable from 'handsontable/base';
import {
  registerEditor,
  AutocompleteEditor,
  BaseEditor,
  CheckboxEditor,
  DateEditor,
  DropdownEditor,
  HandsontableEditor,
  NumericEditor,
  PasswordEditor,
  SelectEditor,
  TextEditor,
} from 'handsontable/editors';
import {
  registerRenderer,
  baseRenderer,
  autocompleteRenderer,
  checkboxRenderer,
  htmlRenderer,
  numericRenderer,
  passwordRenderer,
  textRenderer,
} from 'handsontable/renderers';
import {
  registerValidator,
  autocompleteValidator,
  dateValidator,
  numericValidator,
  timeValidator,
} from 'handsontable/validators';
import {
  registerCellType,
  AutocompleteCellType,
  CheckboxCellType,
  DateCellType,
  DropdownCellType,
  HandsontableCellType,
  NumericCellType,
  PasswordCellType,
  TextCellType,
  TimeCellType,
} from 'handsontable/cellTypes';
import {
  AutoColumnSize,
  AutoRowSize,
  Autofill,
  BasePlugin,
  BindRowsWithHeaders,
  CollapsibleColumns,
  ColumnSorting,
  ColumnSummary,
  Comments,
  ContextMenu,
  CopyPaste,
  CustomBorders,
  DragToScroll,
  DropdownMenu,
  ExportFile,
  Filters,
  Formulas,
  HeaderTooltips,
  HiddenColumns,
  HiddenRows,
  ManualColumnFreeze,
  ManualColumnMove,
  ManualColumnResize,
  ManualRowMove,
  ManualRowResize,
  MergeCells,
  MultiColumnSorting,
  MultipleSelectionHandles,
  NestedHeaders,
  NestedRows,
  ObserveChanges,
  PersistentState,
  Search,
  TouchScroll,
  TrimRows,
  UndoRedo,
  registerPlugin,
} from 'handsontable/plugins';
import {
  registerLanguageDictionary,
  deCH,
  deDE,
  enUS,
  esMX,
  frFR,
  itIT,
  jaJP,
  koKR,
  lvLV,
  nbNO,
  nlNL,
  plPL,
  ptBR,
  ruRU,
  zhCN,
  zhTW,
} from 'handsontable/i18n';

registerLanguageDictionary(deCH);
registerLanguageDictionary(deDE);
registerLanguageDictionary(enUS);
registerLanguageDictionary(esMX);
registerLanguageDictionary(frFR);
registerLanguageDictionary(itIT);
registerLanguageDictionary(jaJP);
registerLanguageDictionary(koKR);
registerLanguageDictionary(lvLV);
registerLanguageDictionary(nbNO);
registerLanguageDictionary(nlNL);
registerLanguageDictionary(plPL);
registerLanguageDictionary(ptBR);
registerLanguageDictionary(ruRU);
registerLanguageDictionary(zhCN);
registerLanguageDictionary(zhTW);

registerEditor(BaseEditor);
registerEditor(AutocompleteEditor);
registerEditor(CheckboxEditor);
registerEditor(DateEditor);
registerEditor(DropdownEditor);
registerEditor(HandsontableEditor);
registerEditor(NumericEditor);
registerEditor(PasswordEditor);
registerEditor(SelectEditor);
registerEditor(TextEditor);

registerRenderer(baseRenderer);
registerRenderer(autocompleteRenderer);
registerRenderer(checkboxRenderer);
registerRenderer(htmlRenderer);
registerRenderer(numericRenderer);
registerRenderer(passwordRenderer);
registerRenderer(textRenderer);

registerValidator(autocompleteValidator);
registerValidator(dateValidator);
registerValidator(numericValidator);
registerValidator(timeValidator);

registerCellType(AutocompleteCellType);
registerCellType(CheckboxCellType);
registerCellType(DateCellType);
registerCellType(DropdownCellType);
registerCellType(HandsontableCellType);
registerCellType(NumericCellType);
registerCellType(PasswordCellType);
registerCellType(TimeCellType);
registerCellType(TextCellType);

registerPlugin(AutoColumnSize);
registerPlugin(Autofill);
registerPlugin(AutoRowSize);
registerPlugin(BindRowsWithHeaders);
registerPlugin(CollapsibleColumns);
registerPlugin(ColumnSorting);
registerPlugin(ColumnSummary);
registerPlugin(Comments);
registerPlugin(ContextMenu);
registerPlugin(CopyPaste);
registerPlugin(CustomBorders);
registerPlugin(DragToScroll);
registerPlugin(DropdownMenu);
registerPlugin(ExportFile);
registerPlugin(Filters);
registerPlugin(Formulas);
registerPlugin(HeaderTooltips);
registerPlugin(HiddenColumns);
registerPlugin(HiddenRows);
registerPlugin(ManualColumnFreeze);
registerPlugin(ManualColumnMove);
registerPlugin(ManualColumnResize);
registerPlugin(ManualRowMove);
registerPlugin(ManualRowResize);
registerPlugin(MergeCells);
registerPlugin(MultiColumnSorting);
registerPlugin(MultipleSelectionHandles);
registerPlugin(NestedHeaders);
registerPlugin(NestedRows);
registerPlugin(ObserveChanges);
registerPlugin(PersistentState);
registerPlugin(Search);
registerPlugin(TouchScroll);
registerPlugin(TrimRows);
registerPlugin(UndoRedo);

new Handsontable(container, {});