@olton/latte/src/helpers/json.js

Simple test framework for JavaScript and TypeScript with DOM supports

export const stringify = (obj) => {
  const safer = () => {
    const seen = new WeakSet()
    return (key, value) => {
      if (typeof value === 'object' && value !== null) {
        if (seen.has(value)) {
          return
        }
        seen.add(value)
      }
      return value
    }
  }
  return JSON.stringify(obj, safer())
}

export const safeStringify = (obj) => {
  const seen = new WeakSet();
  return JSON.stringify(obj, (key, value) => {
    if (typeof value === 'object' && value !== null) {
      if (seen.has(value)) return '[Circular]';
      seen.add(value);
    }
    return value;
  });
}