Recursively redact keys from object.

index.ts

recursiveRedact({ a: 1, b: { a: 1, b: 2 } }, new Set(['a']))
// Result
//   {
//    "a": "[redacted]",
//    "b": {
//      "a": "[redacted]",
//      "b": 2
//    }
//   }

recursive-redact.ts

// Adapted from https://stackoverflow.com/a/72493889

const recursiveRedact = <T extends Object>(obj: T, keys: Set<string>, visitedIn?: Set<any>): T => {
  if (typeof obj !== 'object') return obj;
  const visited = visitedIn ?? new Set();
  visited.add(obj);
  Object.entries(obj).forEach(([key, val]) => {
    if (keys.has(key)) {
      obj[key as keyof T] = '[redacted]' as any;
    } else if (typeof val === 'object' && !visited.has(val)) {
      recursiveRedact(val, keys, visited);
    }
  });
  return obj;
};