find key or value in object

find.js

function findKey(obj, key, callback = path => {console.warn(JSON.stringify(path));}, eq = (a,b) => a===b, path = [], visited = new Set()) {
	if (!obj || visited.has(obj) || typeof obj !== "object") return;
	visited.add(obj);
	for (const k in obj) {
		path.push(k);
		try {
			if (eq(k, key)) callback(path.slice());
			findKey(obj[k], key, callback, eq, path, visited);
		} catch (e) {
		}
		path.pop();
	}
}

function findValue(obj, value, callback = path => {console.warn(JSON.stringify(path));}, eq = (a,b) => a===b, path = [], visited = new Set()) {
	if (!obj || visited.has(obj) || typeof obj !== "object") return;
	visited.add(obj);
	for (const k in obj) {	
		path.push(k);
		try {
			if (eq(obj[k], value)) callback(path.slice());
			findValue(obj[k], value, callback, eq, path, visited)
		} catch (e) {
		}
		path.pop();
	}
}