JSON parser which helps us check whether it has been formatted correctly

test.js

let fs = require('fs');

let checkJson = (path) => {
  fs.readdir(path, (err, files) => {
    files.forEach(file => {
      if (fs.lstatSync(`${path}/${file}`).isDirectory()) {
        checkJson(`${path}/${file}`)
      } else {
        readFile(`${path}/${file}`);
      }
    });
  });
}

let readFile = (path) => {
  let aa = fs.createReadStream(path, 'utf8');
  aa.on('data', (chunk) => {
    try {
      JSON.parse(chunk); 
      // console.log(JSON.parse(chunk));
    } catch (e) {
      console.log('There is an error in' + path);
       process.exit(1); 
    }
  });
}

checkJson('./demo');