stringToSlug

1/**
2 * Converts a string into a URL-friendly slug.
3 * Transforms the string to lowercase, trims it, replaces non-alphanumeric characters
4 * with hyphens, and removes leading/trailing hyphens.
5 *
6 * @param str - The input string to convert.
7 * @returns A slugified version of the string.
8 */
9export function stringToSlug(str: string): string {
10  return str
11    .toLowerCase()
12    .trim()
13    .replace(/[^a-z0-9]+/g, '-')
14    .replace(/^-+|-+$/g, '');
15}

1test('stringToSlug - basic conversion', () => {
2  expect(stringToSlug('Hello World')).toBe('hello-world');
3});
4
5test('stringToSlug - trims and lowercases', () => {
6  expect(stringToSlug('  Trim Me  ')).toBe('trim-me');
7});
8
9test('stringToSlug - removes special characters', () => {
10  expect(stringToSlug('Café & Restaurant!')).toBe('caf-restaurant');
11});
12
13test('stringToSlug - handles multiple separators', () => {
14  expect(stringToSlug('a___b---c')).toBe('a-b-c');
15});
16
17test('stringToSlug - handles non-latin characters', () => {
18  expect(stringToSlug('こんにちは')).toBe(''); // only a-z0-9 are retained
19});
20
21test('stringToSlug - empty string', () => {
22  expect(stringToSlug('')).toBe('');
23});