zhepa

function printKeys(object) {
    for (const [ key, value ] of Object.entries(object)) {
        if (value?.constructor.name === 'Object') {
            printKeys(value);
        } else console.log(key, value);
    }
}

function printKeys(object, prefix = '') {
    for (const [ key, value ] of Object.entries(object)) {
        if (value?.constructor.name === 'Object') {
            printKeys(value, `${prefix}${key}.`);
        } else console.log(prefix + key, value);
    }
}