Converting circular structure to JSON\n --＞ starting at object with constructor ‘d‘\n | pr

有时候使用JSON.stringify()时会报这个错：

 

header.vue:92 Uncaught (in promise) TypeError: Converting circular structure to JSON
    --> starting at object with constructor 'd'
    |     property '_readableState' -> object with constructor 'b'
    |     property 'pipes' -> object with constructor 'i'
    |     property '_readableState' -> object with constructor 'b'
    --- property 'pipes' closes the circle
    at JSON.stringify (<anonymous>)
    at 

解决办法：

// 由于json.stringify嵌套循环导致报错的解决函数，obj是要stringify的对象
const circularSafeStringify = (obj) => {
  const cache = new Set();
  return JSON.stringify(obj, (key, value) => {
    if (typeof value === "object" && value !== null) {
      if (cache.has(value)) {
        // 当前对象已经存在于缓存中，说明存在循环引用，返回占位符或其他处理方式
        return "[Circular Reference]";
      }
      cache.add(value);
    }
    return value;
  });
}