Was looking for a simple bit of code to increment the last number in a text and found a little snippet on stackoverflow. It worked well but it didn't add back the leading zeros from the number. So I made some adjustments.

function incrementLast(str, addIfNoNumber) {
    if (str === null || str === undefined) throw Error('Argument \'str\' should be null or undefined');
    const regex = /[0-9]+$/;
    if (str.match(regex)) {
        return str.replace(regex, (match) => {
            number = parseInt(match, 10) + 1;
            if (number.toString().length < match.length) {
                number = String(number).padStart(match.length, '0');
            }
            return number;
        });
    }
    return addIfNoNumber ? str + 1 : str;
}