src/reverse.js

/**
 * Reverses the characters of a string.
 *
 * @param {string} s - The string to reverse.
 * @returns {string} The reversed string.
 * @throws {TypeError} If the input is not a string.
 */
export function reverse(s) {
    if (typeof s !== "string") {
        throw new TypeError("Input must be a string");
    }
    // An empty string will naturally return an empty string.
    return s.split("").reverse().join("");
}