reverse_words.js

const reverseWords = string => {
  const wordsArr = string.split(' ')

  let result = []

  wordsArr.forEach(el => {
    result.push(el.split('').reverse().join(''))
  })

  return result.join(' ')
}

const string = 'abcd ef gt'
const reversed = reverseWords(string)

console.log(`reverse of '${string}' is '${reversed}'`)