Normally, you should be able to read these sentences...

readable.js

const match = sentence => sentence.match();

const word_manipulation = word => {
  const characters = [...word]
  const start = characters.shift() || ''
  const end = characters.pop() || ''
  
  return `${start}${characters.map((a) => [Math.random(),a]).sort((a,b) => a[0]-b[0]).map((a) => a[1]).join('')}${end}`
}

const test = sentence => console.log(sentence.replace(/(\w)+/g, word_manipulation))

test("A day without sunshine is like, you know, night")
test("Hapiness is not something ready made. It comes from your own actions.")
test("Be yourself; everyone else is already taken.")
test("Don't watch the clock; do what it does. Keep going.")