@liara/cli/lib/utils/validate-port.js

The command line interface for Liara

export default function validatePort(input) {
    input = Number(input);
    if (!input) {
        return 'Port must be a number.';
    }
    if (!Number.isInteger(input) || input < 0) {
        return 'Port must be an integer, greater than zero.';
    }
    return true;
}