# babel-plugin-transform-jsbi-to-bigint [![babel-plugin-transform-jsbi-to-bigint on npm](https://img.shields.io/npm/v/babel-plugin-transform-jsbi-to-bigint)](https://www.npmjs.com/package/babel-plugin-transform-jsbi-to-bigint)

Compile [JSBI](https://github.com/GoogleChromeLabs/jsbi) code that works in today’s environments to native BigInt code.

## Example

Input using [JSBI](https://github.com/GoogleChromeLabs/jsbi):

```js
import JSBI from 'jsbi';

const a = JSBI.BigInt(Number.MAX_SAFE_INTEGER);
const b = JSBI.BigInt('42');

JSBI.add(a, b);
JSBI.subtract(a, b);
JSBI.multiply(a, b);
JSBI.divide(a, b);
JSBI.remainder(a, b);
JSBI.exponentiate(a, b);
JSBI.leftShift(a, b);
JSBI.signedRightShift(a, b);
JSBI.bitwiseAnd(a, b);
JSBI.bitwiseOr(a, b);
JSBI.bitwiseXor(a, b);

JSBI.unaryMinus(a);
JSBI.bitwiseNot(a);

JSBI.equal(a, b);
JSBI.notEqual(a, b);
JSBI.lessThan(a, b);
JSBI.lessThanOrEqual(a, b);
JSBI.greaterThan(a, b);
JSBI.greaterThanOrEqual(a, b);

JSBI.EQ(a, b);
JSBI.NE(a, b);
JSBI.LT(a, b);
JSBI.LE(a, b);
JSBI.GT(a, b);
JSBI.GE(a, b);

a.toString();
JSBI.toNumber(a);
a instanceof JSBI;

JSBI.asIntN(64, JSBI.BigInt('42'));
JSBI.asUintN(64, JSBI.BigInt('42'));
```

Transpiled output using [native `BigInt`s](https://developers.google.com/web/updates/2018/05/bigint):

```js
const a = BigInt(Number.MAX_SAFE_INTEGER);
const b = 42n;

a + b;
a - b;
a * b;
a / b;
a % b;
a ** b;
a << b;
a >> b;
a & b;
a | b;
a ^ b;

-a;
~a;

a === b;
a !== b;
a < b;
a <= b;
a > b;
a >= b;

a == b;
a != b;
a < b;
a <= b;
a > b;
a >= b;

a.toString();
Number(a);
typeof a === 'bigint';

BigInt.asIntN(64, 42n);
BigInt.asUintN(64, 42n);
```

See [the JSBI documentation](https://github.com/GoogleChromeLabs/jsbi) for more information.

## Installation

```sh
$ npm install babel-plugin-transform-jsbi-to-bigint
```

## Usage

### Via `.babelrc` (recommended)

`.babelrc`

```json
{
  "plugins": ["transform-jsbi-to-bigint"]
}
```

### Via CLI

```sh
$ babel --plugins transform-jsbi-to-bigint script.js
```

### Via Node.js API

```js
require('@babel/core').transform(code, {
  'plugins': ['transform-jsbi-to-bigint']
});
```

## For maintainers

### How to publish a new release

1. On the `main` branch, bump the version number in `package.json`:

    ```sh
    npm version patch -m 'Release v%s'
    ```

    Instead of `patch`, use `minor` or `major` [as needed](https://semver.org/).

    Note that this produces a Git commit + tag.

1. Push the release commit and tag:

    ```sh
    git push
    ```

    Our CI then automatically publishes the new release to npm.