Slugify with Emoji Support

emoji.ts

export const emojiMap: { [key: string]: string } = {
  '💯': '100',
  '🔢': '1234',
  '😀': 'grinning',
  '😬': 'grimacing',
  '😁': 'grin',
  '😂': 'joy',
  // ...
};

slugify-test.ts

import slugify from 'my-app/utils/slugify';
import { module, test } from 'qunit';

module('Unit | Utility | slugify', function(hooks) {
  test('it dasherizes and removes all non SEO-friendly characters', function(assert) {
    assert.expect(4);
    assert.equal(slugify('Sales & Marketing'), 'sales-marketing');
    assert.equal(
      slugify('New - Today Only! The #1 way!'),
      'new-today-only-the-1-way'
    );
    assert.equal(slugify('---- Select One ----'), 'select-one');
    assert.equal(slugify('Roll the 🎲 emoji'), 'roll-the-game-die-emoji');
  });
});

slugify.ts

import { dasherize } from '@ember/string';
import { emojiMap } from 'my-app/utils/emoji';

export default function slugify(original: string): string {
  const dasherized = dasherize(original);
  let replacement = '';
  for (let char of dasherized) {
    if (emojiMap[char]) {
      replacement += dasherize(emojiMap[char]);
    } else if (/[A-Za-z0-9]/.test(char)) {
      replacement += char;
    } else if (
      char === '-' &&
      replacement.length !== 0 &&
      replacement[replacement.length - 1] !== '-'
    ) {
      replacement += char;
    }
  }
  return replacement.replace(/-$/, '');
}