Node script to split a JSON file containing a single object into a folder of files.

split.js

const fs = require('fs');
const directory = process.argv[2];

fs.mkdir(directory, {
  recursive: false
}, (err) => {
  fs.readFile(`./${directory}.json`, 'utf8', (err, data) => {
    if (err) throw err;
    Object.entries(JSON.parse(data)).forEach(pair => {
      const key = pair[0];
      const value = pair[1];
      fs.writeFileSync(`./${directory}/${key}.json`, JSON.stringify(value), 'utf8');
      console.log(key);
    })
  });
});