@ig3/srf-scheduler/formatLocalDate.js

This is the default scheduler for [srf](https://www.npmjs.com/package/@ig3/srf) - spaced repetition flashcards.

'use strict';

// Returns YYYY-MM-DD from the given date
module.exports = function formatLocalDate (date) {
  const format = (n) => (n < 10 ? '0' : '') + n;
  return date.getFullYear() +
    '-' + format(date.getMonth() + 1) +
    '-' + format(date.getDate());
};