zero-fill.js
335 Bytes
export default function zeroFill(number, targetLength, forceSign) {
var absNumber = '' + Math.abs(number),
zerosToFill = targetLength - absNumber.length,
sign = number >= 0;
return (sign ? (forceSign ? '+' : '') : '-') +
Math.pow(10, Math.max(0, zerosToFill)).toString().substr(1) + absNumber;
}