encode.js

const myArray = ['manjula','26','Software Engineer']
myArray[2] = myArray

const myArray1 = [ 1 , 'a' , { data : 'manjula'}]
myArray1[2].parent = myArray1

function encodeCycles(input) {

    if(typeof input !== 'object') {
        return input
    }

    const map = new WeakMap()
    map.set(input, '$')

    function encodeJSONCycle(obj, cleanedObj = {}, path = '') {

        if(typeof obj !== 'object') {
          return obj
        }
        
        for(var key in obj) {
          
            if(key && typeof obj[key] === 'object') {
                if(!map.get(obj[key])) {
                    map.set(obj[key], `${path}.${key}`)
                    cleanedObj[key] = encodeJSONCycle(obj[key], cleanedObj[key], `${path}${key}`)
                } else {
                    cleanedObj[key] = { '$ref' : map.get(obj[key]) }
                }            
            } else {
                  cleanedObj[key] = obj[key]
            }              
        }
      
        return cleanedObj
    }

    return encodeJSONCycle(input, input instanceof Array ? [] : {})
}

JSON.encodeCycles = encodeCycles

console.log('original input : ' , myArray ,'\nfinal output : ', 
JSON.encodeCycles(myArray))
console.log("Stringify" + JSON.stringify(JSON.encodeCycles(myArray),'\t',4))

console.log('original input : ' , 
myArray1 ,'\nfinal output : ', JSON.encodeCycles(myArray1))
console.log("Stringify" + JSON.stringify(JSON.encodeCycles(myArray1),'\t',4))

console.log(JSON.encodeCycles(100))

Encode cyclic data structures.