May 13, 2022

TypeError: Converting circular structure to JSON

The "Converting circular structure to JSON" error occurs when we pass an object that contains circular references to the JSON.stringify() method. To solve the error, make sure to remove any circular references before converting the object to JSON.

There are two solution to it :

Just copy the array/object to new variable and pass it to the parent array/object
Check the getCircularReplacer() method code block.

//Solution 1          
job.job_response.forEach((resp) => {
              if (resp.shortlist) {
                var xjob = Array.from(job);  //notice what i did with xjob;
                resp.jobData = xjob;
                shrtL.push(resp);

              }
            })

#Solution 2

const getCircularReplacer = () => {
  const seen = new WeakSet();
  return (key, value) => {
    if (typeof value === 'object' && value !== null) {
      if (seen.has(value)) {
        return;
      }
      seen.add(value);
    }
    return value;
  };
};

const obj = {address: {country: 'Chile'}, numbers: [1, 2, 3], age: 30};
obj.name = obj;

// ✅ Works
const result = JSON.stringify(obj, getCircularReplacer());
console.log(result); // 👉️ {"address":{"country":"Chile"},"numbers":[1,2,3],"age":30}
const getCircularReplacer = () => {
  const seen = new WeakSet();
  return (key, value) => {
    if (typeof value === 'object' && value !== null) {
      if (seen.has(value)) {
        return;
      }
      seen.add(value);
    }
    return value;
  };
};

const obj = {address: {country: 'Chile'}, numbers: [1, 2, 3], age: 30};
obj.name = obj;

// ✅ Works
const result = JSON.stringify(obj, getCircularReplacer());
console.log(result); // 👉️ {"address":{"country":"Chile"},"numbers":[1,2,3],"age":30}

TypeError: Converting circular structure to JSON

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