我得到了同样的错误与jQuery formvaliadator，但当我删除了一个console.log内部的成功:功能，它工作。

根据MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#issue_with_json.stringify_when_serializing_circular_references

它是一个循环json，不能直接转换。

解决方案1:

https://www.npmjs.com/package/flatted

// ESM
import {parse, stringify, toJSON, fromJSON} from 'flatted';

// CJS
const {parse, stringify, toJSON, fromJSON} = require('flatted');

const a = [{}];
a[0].a = a;
a.push(a);

stringify(a); // [["1","0"],{"a":"0"}]

解决方案2:(同样通过MDN)

https://github.com/douglascrockford/JSON-js

我在NodeJS上是这样解决这个问题的:

var util = require('util');

// Our circular object
var obj = {foo: {bar: null}, a:{a:{a:{a:{a:{a:{a:{hi: 'Yo!'}}}}}}}};
obj.foo.bar = obj;

// Generate almost valid JS object definition code (typeof string)
var str = util.inspect(b, {depth: null});

// Fix code to the valid state (in this example it is not required, but my object was huge and complex, and I needed this for my case)
str = str
    .replace(/<Buffer[ \w\.]+>/ig, '"buffer"')
    .replace(/\[Function]/ig, 'function(){}')
    .replace(/\[Circular]/ig, '"Circular"')
    .replace(/\{ \[Function: ([\w]+)]/ig, '{ $1: function $1 () {},')
    .replace(/\[Function: ([\w]+)]/ig, 'function $1(){}')
    .replace(/(\w+): ([\w :]+GMT\+[\w \(\)]+),/ig, '$1: new Date("$2"),')
    .replace(/(\S+): ,/ig, '$1: null,');

// Create function to eval stringifyed code
var foo = new Function('return ' + str + ';');

// And have fun
console.log(JSON.stringify(foo(), null, 4));

一种方法是从主对象中剥离对象和函数。并对更简单的形式进行stringalize

function simpleStringify (object){
    // stringify an object, avoiding circular structures
    // https://stackoverflow.com/a/31557814
    var simpleObject = {};
    for (var prop in object ){
        if (!object.hasOwnProperty(prop)){
            continue;
        }
        if (typeof(object[prop]) == 'object'){
            continue;
        }
        if (typeof(object[prop]) == 'function'){
            continue;
        }
        simpleObject[prop] = object[prop];
    }
    return JSON.stringify(simpleObject); // returns cleaned up JSON
};

如果你使用node js使用inspect()(参考文档)

import {inspect} from "util";
console.log(inspect(object));

在我的例子中，它是在一些代码更改后留在单元测试中的flush()。

之前

it('something should be...', () => {
// do tests
flush();
}

后

it('something should be...', () => {
// do tests
}

我得到了同样的错误与jQuery formvaliadator，但当我删除了一个console.log内部的成功:功能，它工作。