# Dice Roller
A typescript library for rolling dice using dice notation.

## Installation

### NPM
```bash
npm install @mrprim/dice-roller
```

### Yarn
```bash
yarn add @mrprim/dice-roller
```

## Usage

```javascript
import roll from '@mrprim/dice-roller'

const total = roll('1d6+1d4+3')
const details = roll('1d4-1', true) // need to update this api to take an options object
```

### Dice Notation

The input of the `roll` function must be a properly formatted string in dice notation format. EX: ` 2x4d10`

Multiple dice notation strings can be separated by `+` or `-` to roll more than one type of die or add one or more modifiers to a roll.

#### Multiplier (Nx)
Perform the following dice action multiple times - `2x4d10` rolls `4d10` twice.

Valid values: Integer

#### Dice Type (dN)
The type of die to roll.

Valid values: Integer, 'F' (for Fate die), '%' (for Percentile die; equivalent to d100)

#### Keep Highest N Dice (kN, khN)
The number of dice to use to calculate the total of a roll, keeping those with the highest value.

Valid values: Integer

#### Keep Lowest N Dice (klN)
The number of dice to use to calculate the total of a roll, keeping those with the lowest value.

Valid values: Integer

#### Reroll Dice Above N (! or !N)
Dice that roll N or above are rerolled.  If N is left blank then it is set to the maximum value of the dice.

Valid values: Integer