does the reverse function in javascript for string code example

Example 1: javascript .split().reverse.join

"this is a test string".split("").reverse().join("");
//"gnirts tset a si siht"
//as a function
function reverseString(string){
return string.split("").reverse().join("");}
reverseString("test string");
//"gnirts tset"

Example 2: reverse string js

str.split('').reduce((reversed, character) =>{
    return character + reversed;
  }, '');
//apple = leppa