How to write and read JSON file in Node.js?

README.md

Installation and Setup Instructions

• Open terminal
• mkdir NodeJsWriteReadExample
• cd /NodeJsWriteReadExample
• touch insert.js read.js data.json
• copy codes below and past the files

For write data;

• node insert.js

After write the data to data.json, You can read data;

• node read.js

data.json

//this is a blank json file

insert.js

const fs = require('fs');

const data = {
    result : [{
        id:'001',
        message:{
            messageID:'4567',
            from:{
                id:'4567',
                first_name:'Jeson',
                user_name: '@jeson'
            },
            message : 'hello how are you',
            details : {
                date: '23.03.2020',
                time: '2.33 PM'
            }
        }
    },
    {
        id:'002',
        message:{
            messageID:'3367',
            from:{
                id:'3367',
                first_name:'Ayşe',
                user_name: '@ayse'
            },
            message : 'hello im fine',
            details : {
                date: '22.09.2010',
                time: '2.33 PM'
            }
        }
    }]
}

const toJson = JSON.stringify(data);
fs.writeFileSync("data.json",toJson);

read.js

const fs = require('fs');

const doc = fs.readFileSync("data.json");
const tostring = doc.toString();
const data = JSON.parse(tostring);

console.log(data);