/node_modules/moment/src/lib/utils/zero-fill.js

1export default function zeroFill(number, targetLength, forceSign) {
2    var absNumber = '' + Math.abs(number),
3        zerosToFill = targetLength - absNumber.length,
4        sign = number >= 0;
5    return (sign ? (forceSign ? '+' : '') : '-') +
6        Math.pow(10, Math.max(0, zerosToFill)).toString().substr(1) + absNumber;
7}