is-valid-acn/dist/index.js

Check if a number is a valid Australian Company Number (ACN)

var weights = [8, 7, 6, 5, 4, 3, 2, 1];
export default function isValidACN(rawAcn) {
    if (!rawAcn) {
        return false;
    }
    // strip non-alphanumeric characters
    var acn = rawAcn.toString().replace(/[^a-z\d]/gi, '');
    // check if length is 9 digits
    if (acn.length !== 9) {
        return false;
    }
    // apply ato check method
    var sum = 0;
    weights.forEach(function (weight, position) {
        var digit = Number(acn[position]);
        sum += weight * digit;
    });
    var checksum = (10 - (sum % 10)) % 10;
    return checksum === Number(acn[8]);
}