how-to-publish-a-npm-package

bool.js

const bool = () => Boolean(Math.round(Math.random()));

export default bool;

float.js

const float = (max, min) => Math.random() * (max - min) + min;

export default float;

index.js

import bool from './bool';
import float from './float';
import integer from './integer';

const choice = (max = 1, min = 0, options = {}) => {
  if (options.float === true) {
    return float(max, min);
  } else if (options.bool === true) {
    return bool();
  } else {
    return integer(max, min);
  }
}

export default choice;

integer.js

const integer = (max, min) => ~~(Math.random() * (max - min + 1) + min);

export default integer;