ObjectFinder.js

function find(object, predicate, excludes, thresholdDepth) {
    let result = new Map;
    function find0(path, object, result, depth) {
        if (depth >= thresholdDepth) return;
        for (let key of Object.getOwnPropertyNames(object)) {
            let value, childPath = [...path, key];
            try {
                value = object[key];
            } catch (key) {
                return;
            }
            if (excludes.some(test => test(key, value))) continue;
            if (predicate(key, value)) result.set(childPath, value);
            if (value instanceof Object)
                find0(childPath, value, result, depth + 1);
        }
    }
    find0("", object, result, 0);
    return result;
}