# Slugify
![](https://github.com/jayjun/slugify/workflows/CI/badge.svg)
[![Hex.pm](https://img.shields.io/hexpm/v/slugify.svg)](https://hex.pm/packages/slugify)
Transform strings from any language into slugs.
It works by transliterating Unicode characters into alphanumeric strings (e.g.
`字` into `zi`). All punctuation is stripped and whitespace between words are
replaced by hyphens.
This package has no dependencies.
## Examples
```elixir
Slug.slugify("Hello, World!")
"hello-world"
Slug.slugify("你好,世界")
"nihaoshijie"
Slug.slugify("Wikipedia case", separator: ?_, lowercase: false)
"Wikipedia_case"
# Remember to check for nil if a valid slug is important!
Slug.slugify("🙅")
nil
```
## Options
Whitespaces are replaced by separators (defaults to `-`). Pass any codepoint or
string to customize the separator, or pass `""` to have none.
```elixir
Slug.slugify(" How are you? ")
"how-are-you"
Slug.slugify("John Doe", separator: ?.)
"john.doe"
Slug.slugify("Wide open spaces", separator: "%20")
"wide%20open%20spaces"
Slug.slugify("Madam, I'm Adam", separator: "")
"madamimadam"
```
Slugs are forced lowercase by default, unless `lowercase: false` is passed.
```elixir
Slug.slugify("StUdLy CaPs", lowercase: false)
"StUdLy-CaPs"
```
Set `truncate` so slugs don‘t exceed a certain length. They are trimmed to the
closest word, as delimited by separators.
```elixir
Slug.slugify("Call Me Maybe", truncate: 7)
"call-me"
Slug.slugify("Call Me Maybe", truncate: 10)
"call-me"
```
To avoid transforming certain characters, pass a string (or a list of strings)
of graphemes to `ignore`.
```elixir
Slug.slugify("你好,世界", ignore: "你好")
"你好shijie"
Slug.slugify("你好,世界", ignore: ["你", "好"])
"你好shijie"
```
## Caveats
Slugify cannot differentiate between Chinese characters and Japanese Kanji.
In the same vein as other libraries, Japanese Kanji will transform into Chinese
pinyin.
## Installation
Add `slugify` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:slugify, "~> 1.3"}
]
end
```
## Links
- [Documentation][2]
- [Hex][3]
## License
Slugify is released under [MIT][4] license.
## Credits
Inspired by [Unidecode][5], [Transliteration][6] and [Slugger][7]. Data from [dzcpy/transliteration][6].
[1]: https://www.ietf.org/rfc/rfc3986.txt
[2]: https://hexdocs.pm/slugify/Slug.html
[3]: https://hex.pm/packages/slugify
[4]: https://github.com/jayjun/slugify/blob/master/LICENSE.md
[5]: http://search.cpan.org/~sburke/Text-Unidecode-1.30/lib/Text/Unidecode.pm
[6]: https://github.com/dzcpy/transliteration
[7]: https://github.com/h4cc/slugger