# babel-plugin-precise-arithmetic

> A babel plugin as a solution for the problem in the calculation precision of the floating points numbers.

Latest version **1.0.0** (published 2021-02-22) · MIT license · 0 weekly downloads

## Install

```sh
npm install babel-plugin-precise-arithmetic
pnpm add babel-plugin-precise-arithmetic
yarn add babel-plugin-precise-arithmetic
bun add babel-plugin-precise-arithmetic
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.0 |
| Published | 2021-02-22 |
| First published | 2021-02-22 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Unpacked size | 8.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Author | hx-dl |
| Maintainers | hx-dl |

## Links

- npm: https://www.npmjs.com/package/babel-plugin-precise-arithmetic
- npm.io page: https://npm.io/package/babel-plugin-precise-arithmetic

## Recent versions

- 1.0.0 (latest) — 2021-02-22

## README

# babel-plugin-precise-arithmetic

A babel plugin as a solution for the problem in the calculation precision of the floating points numbers.

---

![](https://img.shields.io/badge/build-passing-green) ![](https://img.shields.io/github/license/hx-dl/babel-plugin-precise-arithmetic) ![](https://img.shields.io/github/stars/hx-dl/babel-plugin-precise-arithmetic?label=star&style=social)

## Usage

```
npm install babel-plugin-precise-arithmetic --save-dev
```

## Add babel-plugin-precise-arithmetic

.babelrc

```json
{
  "plugins": ["precise-arithmetic"]
}
```

or

webpack.config.js

```js
...
{
	test: /\.js$/,
	loader: 'babel-loader',
	option: {
		plugins: [
			require('babel-plugin-precise-arithmetic')
		]
	},
},
...
```

## Example

By this plugin, it translate BinaryExpression to FunctionCall for a right result with float number.

```js
var a = 0.1 + 0.2;
//0.30000000000000004
	↓ ↓ ↓ ↓ ↓ ↓
var { accAdd } = require('babel-plugin-precise-arithmetic/src/calc.js');
var a = accAdd(0.1, 0.2); // 0.3
```

```js
var a = 0.1 + 0.2;
var b = 0.8 - 0.2;
//0.30000000000000004
//0.6000000000000001
	↓ ↓ ↓ ↓ ↓ ↓
var { accAdd, accSub } = require('babel-plugin-precise-arithmetic/src/calc.js');
var a = accAdd(0.1, 0.2); //0.3
var a = accSub(0.8, 0.2); //0.6


```

> Note: it doesn't work with eval() And just support (+ - \* \ += -=), if the members of the operator is not Number type, it will return the result as it should be

---
_Source: https://npm.io/package/babel-plugin-precise-arithmetic · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._