JavaScript - JSON.stringify(object, replace, space) with full value path in replace() method

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// Source: https://dirask.com/snippets/js-check-if-value-is-object-jEZzx1
//
const isObject = (entry) => {
    return entry === Object(entry);
};

// Wraps JSON.stringify() method adding full path to value in replace() method.
//
const renderJson = (object, replace, space) => {
    let wrapper = null;
    if (replace) {
        const map = new Map();
        wrapper = function(key, value) {  // WARNING: do not change it to arrow function!
            if (value === object) {
                return replace([], value);
            } else {
                const item = map.get(this);
                const path = item ? [...item, key] : [key];
                if (isObject(value)) {
                    map.set(value, path);
                }
                return replace(path, value);
            }
        };
    }
    return JSON.stringify(object, wrapper, space);
};


// Usage example:

const object = {
    owner: {
        id: 1,
        name: 'John'
    },
    address: {
        id: 1,
        country: 'UK',
        city: 'London'
    }
};

const replace = (keys, value) => {
    const path = keys.join('.');  // <------- `keys` is path to `value` (array of keys)
    console.log(` -> ${path}: ${value}`);
    return value;
};

const json = renderJson(object, replace, 4);


// Output:
//
//     -> : [object Object]
//     -> owner: [object Object]
//     -> owner.id: 1
//     -> owner.name: John
//     -> address: [object Object]
//     -> address.id: 1
//     -> address.country: UK
//     -> address.city: London