ultima-slug

var ultimaSlug = require('ultima-slug')

ultimaSlug('some string') // some-string

// if you prefer something other than '-' as separator
ultimaSlug('some string', '_')  // some_string

Options

ultimaSlug('some string', {
  replacement: '-',  // replace spaces with replacement character, defaults to `-`
  remove: undefined, // remove characters that match regex, defaults to `undefined`
  lower: false,      // convert to lower case, defaults to `false`
  strict: false,     // strip special characters except replacement, defaults to `false`
  locale: 'vi',      // language code of the locale to use
  trim: true         // trim leading and trailing replacement chars, defaults to `true`
})

Remove

For example, to remove *+~.()'"!:@ from the result slug, you can use ultimaSlug('..', {remove: /[*+~.()'"!:@]/g}).

• If the value of remove is a regular expression, it should be a character class and only a character class. It should also use the global flag. (For example: /[*+~.()'"!:@]/g.) Otherwise, the remove option might not work as expected.
• If the value of remove is a string, it should be a single character. Otherwise, the remove option might not work as expected.

Locales

The main charmap.json file contains all known characters and their transliteration. All new characters should be added there first. In case you stumble upon a character already set in charmap.json, but not transliterated correctly according to your language, then you have to add those characters in locales.json to override the already existing transliteration in charmap.json, but for your locale only.

You can get the correct language code of your language from here.

Extend

Out of the box ultimaSlug comes with support for a handful of Unicode symbols. For example the ☢ (radioactive) symbol is not defined in the [charMap][charmap] and therefore it will be stripped by default:

ultimaSlug('unicode ♥ is ☢') // unicode-love-is

However you can extend the supported symbols, or override the existing ones with your own:

ultimaSlug.extend({'☢': 'radioactive'})
ultimaSlug('unicode ♥ is ☢') // unicode-love-is-radioactive

Keep in mind that the extend method extends/overrides the default charMap for the entire process. In case you need a fresh instance of the ultimaSlug's charMap object you have to clean up the module cache first:

delete require.cache[require.resolve('ultima-slug')]
var ultimaSlug = require('ultima-slug')

Contribute

1. Add chars to charmap.json
2. Run tests npm test
3. The tests will build the charmap in index.js and will sort the charmap.json
4. Commit all modified files

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Originally this was a vanilla javascript port of node-slug.
Note that the original slug module has been ported to vanilla javascript too.