Javascript Interview Question:Reverse Order the words in sentence

let str = "Today is Friday";

str = ' ' + str

var length = str.length;

var newStr=''

var last=length

for (let i = length - 1; i >= 0; i--) {

if(str[i]==' '){

newStr = newStr + ' ' + str.substring(i,last).trim()

last = i

}

}

console.log(newStr.trim())

Output:

Friday is Today