Function isJSONSerializable

packages/angular/cli/src/utilities/memoize.ts:57–77

Method to check if the values are JSON serializable

(value: unknown)

/** Method to check if the values are JSON serializable */
function isJSONSerializable(value: unknown): boolean {
  if (!isNonPrimitive(value)) {
    // Can be seralized since it's a primitive.
    return true;
  }

  let nestedValues: unknown[] | undefined;
  if (Array.isArray(value)) {
    // It's an array, check each item.
    nestedValues = value;
  } else if (Object.prototype.toString.call(value) === '[object Object]') {
    // It's a plain object, check each value.
    nestedValues = Object.values(value);
  }

  if (!nestedValues || nestedValues.some((v) => !isJSONSerializable(v))) {
    return false;
  }

  return true;
}