flags for read and write nodejs code example

Example 1: fs writefile node

const fs = require('fs')

const content = 'Some content!'

fs.writeFile('/Users/joe/test.txt', content, err => {
  if (err) {
    console.error(err)
    return
  }
  //file written successfully
})

Example 2: fs readfile encoding

fs.readFile('/etc/passwd', 'utf8', callback);