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JavaScript - swap first and last character in every word in string

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Created by:

Savannah

559

In this article, we would like to show you how to swap the first and last character in every word in a string in JavaScript.

Quick solution:

xxxxxxxxxx
 
const text = 'This is example text';
​
const result = text
    .split(' ')
    .map((word) => {
        if (word.length > 1) {
            word = word[word.length - 1] + word.substring(1, word.length - 1) + word[0];
        }
        return word;
    })
    .join(' ');
​
console.log(result);

Auto running

Reusable function

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In this example, we create a reusable function that splits given text into an array of words, swaps each word's first and last letter, and joins them back into the string.

xxxxxxxxxx
 
const swapFirstAndLast = (text) => {
    return text
        .split(' ')
        .map((word) => {
            if (word.length > 1) {
                word = word[word.length - 1] + word.substring(1, word.length - 1) + word[0];
            }
            return word;
        })
        .join(' ');
};
​
​
// Usage example
const text = 'This is example text';
​
console.log(swapFirstAndLast(text));