Я преобразовал ответ Freddie Nfbnm в TypeScript:
export class JsonUtil {
static isCyclic(json) {
const keys = [];
const stack = [];
const stackSet = new Set();
let detected = false;
function detect(obj, key) {
if (typeof obj !== 'object') {
return;
}
if (stackSet.has(obj)) { // it's cyclic! Print the object and its locations.
const oldIndex = stack.indexOf(obj);
const l1 = keys.join('.') + '.' + key;
const l2 = keys.slice(0, oldIndex + 1).join('.');
console.log('CIRCULAR: ' + l1 + ' = ' + l2 + ' = ' + obj);
console.log(obj);
detected = true;
return;
}
keys.push(key);
stack.push(obj);
stackSet.add(obj);
for (const k in obj) { // dive on the object's children
if (obj.hasOwnProperty(k)) {
detect(obj[k], k);
}
}
keys.pop();
stack.pop();
stackSet.delete(obj);
return;
}
detect(json, 'obj');
return detected;
}
}