Official website and documentation is here

Powered by jsDelivr, you can use the latest version of Formula.js:

<script src="https://cdn.jsdelivr.net/npm/@formulajs/formulajs/lib/browser/formula.min.js"></script>

Then the functions can be accessed as

formulajs.DATE(2008, 7, 8)
formulajs.SUM([1, 2, 3])
...

Install the package:

```
npm i @formulajs/formulajs
```

import * as formulajs from '@formulajs/formulajs' // import entire package
formulajs.SUM([1, 2, 3]) // 6

import { SUM } from '@formulajs/formulajs' // import individual components
SUM([1, 2, 3]) // 6

const formulajs = require('@formulajs/formulajs') // require entire package
formulajs.SUM([1, 2, 3]) // 6

const { SUM } = require('@formulajs/formulajs') // require individual components
SUM([1, 2, 3]) // 6

### Command Line Interface (CLI)

When Formula.js is installed globally using npm, it can be used from the command line. To install Formula.js globally:

```
npm i -g @formulajs/formulajs
```

After installation, Formula.js is available via the command line:

$ formulajs
> SUM(1,2,3)
6

## Differences between Excel functions and Formula.js

The functions `DATE, DATEVALUE, EDATE, EOMONT, NOW, TODAY`

return plain JS Date instead of the serial Excel number.

Copying composite formula directly from Excel into JS will not work out of the box:

```
= DATE(2020,5,9) - DATE(2020,5,8) // Formula.js: 86400000 / Excel: 1
```

It is not recommended to use `DATEVALUE`

to parse string representing a date. Formula.js uses `new Date('YOUR STRING')`

under the hood. There are better libraries to do this job (for example Moment.js)

If you were previously using formulajs from Sutoiku, some functions have been
removed, due to dependency simplification.

Text functions:

`FIXED, TEXT, DOLLAR, VALUE`

Math functions:

`MDETERM, MINVERSE, MMULT, MUNIT`

Otherwise, the 2 packages are fully compatible. You can swap them.

### From @handsontable/formulajs

The code of this package is originally forked from @handsontable/formulajs version 2.0.2 (released in January 2020). The
two packages were identical at the time. There is no regression, only fixes and new functions since the fork.

Original Formula.js project was developed and maintained by Ismael Chang Ghalimi, with support from Sutoiku and help from
the following contributors: Ilmari Karonen, Sébastien Loisel, Trevor Norris, Roönaän, Hannes Stiebitzhofer.

It was then forked and extended by the handsontable/formula.js mainly
contributed by @budnix.

As of September 2023, the repo is officially detached from its Handsontable and Sutoiku origins.