javascript turn string into array

//split into array of strings.
var str = "Well, how, are , we , doing, today";
var res = str.split(",");// Split string into an array of strings
const path = "/usr/home/chucknorris"
let result = path.split("/")
console.log(result)
// result
// ["", "usr", "home", "chucknorris"]
let username = result[3]
console.log(username)
// username
// "chucknorris"var fruits = 'apple, orange, pear, banana, raspberry, peach';
var ar = fruits.split(', '); // split string on comma space
console.log( ar );
// [ "apple", "orange", "pear", "banana", "raspberry", "peach" ]
let countWords = function(sentence){
    return sentence.split(' ').length;
}

console.log(countWords('Type any sentence here'));

//result will be '4'(for words in the sentence)s.split("");