Today I have solved the problem in javascript

Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or transmitted across a network connection link to be reconstructed later in the same or another computer environment.

Design an algorithm to serialize and deserialize a binary tree. There is no restriction on how your serialization/deserialization algorithm should work. You just need to ensure that a binary tree can be serialized to a string and this string can be deserialized to the original tree structure.

Clarification: The input/output format is the same as how LeetCode serializes a binary tree. You do not necessarily need to follow this format, so please be creative and come up with different approaches yourself.

 var serialize = function(root) {

    const result = [];

    function dfs(node){

        if(node == null) {

            result.push('N');

            return;

        }

        result.push(node.val);

        dfs(node.left);

        dfs(node.right);

    }

    dfs(root);

    return result.join(',');

    };

var deserialize = function(data) {

     const iterator = data.split(',').values();

    function dfs(){

        const { value, done } = iterator.next();

        if(value === 'N' || done){

            return null;

        }

        const node = new TreeNode(value);

        node.left = dfs();

        node.right = dfs();

        return node;

    }

    return dfs();

};