Reverse a String in JavaScript

JavaScript has no built-in String.prototype.reverse(). A common approach converts the string to an array, reverses the array, and joins it again.

const text = "plus2net";
const reversed = text.split("").reverse().join("");
console.log(reversed); // ten2sulp

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Reverse with a loop and charAt() Top ↑

const text = "plus2net";
let reversed = "";
for (let i = text.length - 1; i >= 0; i -= 1) {
  reversed += text.charAt(i);
}
console.log(reversed);

This preserves the original page's length and charAt() approach.

Reverse with split(), reverse(), join() Top ↑

const reversed = "JavaScript".split("").reverse().join("");
console.log(reversed);

Use spread syntax for Unicode code points Top ↑

const reversed = [..."A😊B"].reverse().join("");
console.log(reversed); // B😊A

Spreading is safer than split("") for surrogate-pair characters such as many emoji.

Grapheme-cluster limitation Top ↑

Even spread syntax works with Unicode code points, not every human-perceived character. Combining marks and complex emoji sequences may need Intl.Segmenter for truly user-visible character reversal.

Reusable reverse function Top ↑

function reverseString(value) {
  return [...value].reverse().join("");
}
console.log(reverseString("Plus2net"));

Common mistakes Top ↑

reverse() belongs to arrays, not strings. Calling text.reverse() directly causes an error. Also remember that reversal is rarely appropriate for bidirectional-language display.

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Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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