TypeError: Converting circular structure to JSON

问题：

调用第三方接口返回信息在 JSON.stringify() 时抛出 TypeError: Converting circular structure to JSON 异常

原因：

返回结果对象中存在循环引用(具体结果不变展示)，可用以下示例复现该问题：

let obj = {
  time: '8-20',
  expired: '8-31'
}
obj.now = obj
console.log(JSON.stringify(obj))

TypeError: Converting circular structure to JSON
    at JSON.stringify (<anonymous>)
    at Object.<anonymous> (D:\**\test.js:6:18)
    at Module._compile (internal/modules/cjs/loader.js:816:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10)
    at Module.load (internal/modules/cjs/loader.js:685:32)
    at Function.Module._load (internal/modules/cjs/loader.js:620:12)
    at Function.Module.runMain (internal/modules/cjs/loader.js:877:12)
    at internal/main/run_main_module.js:21:11

解决方式：

circular-json

const CJ = require('circular-json')

let obj = {
  time: 'now',
  endIn: 'today'
}
obj.now = obj

console.log(CJ.stringify(obj)) //{"time":"now","endIn":"today","now":"~"}