@simongrasinovski/str-utils/dist/countVowels.js

A lightweight utility library for effortless string manipulation. Simplify common tasks like case validation, conversion and formatting with easy-to-use functions that enhance your JavaScript applications

"use strict";

var _require = require('./utils'),
  ensureString = _require.ensureString;
var _require2 = require('./constants'),
  VOWELS_REGEX = _require2.VOWELS_REGEX;

/**
 * 	Counts the number of vowels in a string.
 *
 * @function
 * @param {string} input - The string to analyze.
 * @returns {number} Count of vowels.
 *
 * @throws {TypeError} Throws an error if the input is not a string.
 *
 * @example
 * const result = countVowels('hello world');
 * console.log(result); // 3
 */
module.exports = ensureString(function (input) {
  var vowels = input.match(VOWELS_REGEX);
  return vowels ? vowels.length : 0;
});