Reverse words in sentences

Algorithms.js

const str = 'I love Tamagochi'
const input = str.split('')

function reverseWords (input) {
  const length = input.length
  let offset = 0
  let lastSpaceIndex = 0

  do {
    lastSpaceIndex = input.indexOf(' ', offset)
    
    if (lastSpaceIndex === -1) {
      lastSpaceIndex = length
    }
    
    for (let i = offset, j = lastSpaceIndex - 1; i < j; i++, j--) {
      let temp = input[i]
      input[i] = input[j]
      input[j] = temp
    }

    offset = lastSpaceIndex + 1
  } while (lastSpaceIndex !== length)

  return input
}

const result = reverseWords(input)
console.log(result)