JsonUtils.ts

export class JsonUtils {
  public static getCircularReplacer(): object {
    const seen = new WeakSet();
    return (key: string, value: object): any => {
      if (typeof value === 'object' && value !== null) {
        if (seen.has(value)) {
          return;
        }
        seen.add(value);
      }
      return value;
    };
  }

  public static stringify(input: any): string {
    return JSON.stringify(input, JsonUtils.getCircularReplacer, 2);
  }
}