How to Reverse a String in JavaScript

Reversing a string in JavaScript means taking the characters of the string and putting them in the opposite order. For example, if you have the string "hello", reversing it would give you "olleh".

There isn’t a built-in function to reverse a string directly in JavaScript, but you can easily do it using these steps:

Convert the string into an array of characters: You can do this using the .split('') method.
Reverse the array: Use the .reverse() method to reverse the order of the elements in the array.
Join the array back into a string: Use the .join('') method to combine the array elements back into a single string.

function reverseString(str) {
  let charArray = str.split('');
  charArray.reverse();
  let reversedString = charArray.join('');
  return reversedString;
}
reverseString('hello');

Explanation:

split(''): method splits the string into an array of individual characters.
reverse(): method reverses the order of elements in the array.
join(''): method combines the elements of the array back into a single string.

str is just a variable name. It’s often used as a short form for the word "string." A string is a sequence of characters (like text), and in the example I gave you earlier, str is used as a parameter to represent any string that you want to reverse.

If you call reverseString('hello'), the str inside the function will be "hello".