Updating all files in a directory with Node.js

node.js 
const fs = require('fs');

fs.readdirSync('./path/to/directory', { 
  recursive: true, 
  withFileTypes: true 
}).filter(item => !item.isDirectory()).map(item => {
  const filePath = item.parentPath + '/' + item.name;
  try {
    const data = fs.readFileSync(filePath, 'utf8');
    if (data.indexOf('string to be replaced') >= 0) {
      const result = data.replace(/string to be replaced/g, replacement);
      fs.writeFileSync(filePath, result);
    }
  } catch (err) {
    console.error(err);
  }
});