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https://github.com/jeromegn/slang

Slim-inspired templating language for Crystal
https://github.com/jeromegn/slang

crystal kilt slang template-language

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Slim-inspired templating language for Crystal

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# Slang [![Build Status](https://travis-ci.org/jeromegn/slang.svg?branch=master)](https://travis-ci.org/jeromegn/slang)

Lightweight, terse, templating language for Crystal.

## Installation

Add this to your application's `shard.yml`:

```yaml
dependencies:
slang:
github: jeromegn/slang
```

## Usage

### Preferred: use Kilt

[Kilt](https://github.com/jeromegn/kilt) is included as a dependency for this project. It should help integrating non-ECR template engines.

Add this to your application's `shard.yml`:
```yaml
dependencies:
kilt:
github: jeromegn/kilt
```

```
require "kilt/slang"

Kilt.render("path/to/file.slang") #=>
```

Example with [Kemal](http://kemalcr.com) (includes Kilt):

```crystal
require "kilt/slang"

get "/" do
Kilt.render "path/to/file.slang"
end
```

### Without Kilt

```crystal
String.build do |str|
Slang.embed("path/to/file.slang", "str")
end
```

## Syntax

```slim
doctype html
html
head
meta name="viewport" content="width=device-width,initial-scale=1.0"
title This is a title
css:
h1 {color: red;}
p {color: green;}
style h2 {color: blue;}
body
/! Visible multi-line comment
span this is wrapped in a comment
/[if IE]
p Dat browser is old.
/ Invisible multi-line comment
span this is wrapped in a comment
h1 This is a slang file
h2 This is blue
input type="checkbox" checked=false
input type="checkbox" checked=true
input type="checkbox" checked="checked"
span#some-id.classname
#hello.world.world2
- some_var = "hello world haha"
span
span data-some-var=some_var two-attr="fun" and a #{p("hello")}
span
span.deep_nested
p
| text inside of


= Process.pid
| text node
' other text node
span.alongside pid=Process.pid
custom-tag#with-id pid="#{Process.pid}"
- ["ah", "oh"].each do |s|
span = s
/ This is an invisible comment
- if true == true
#amazing-div some-attr="hello"
- else
#not-so-amazing-div some-attr="goodbye"
/! This is a visible comment
script var num1 = 8*4;

javascript:
var num2 = 8*3;
alert("8 * 3 + 8 * 4 = " + (num1 + num2));
```

Given the context:

```crystal
some_var = "hello"
strings = ["ah", "oh"]
```

Compiles to HTML:

```html



This is a title

h1 {color: red;}
p {color: green;}

h2 {color: blue;}




This is a slang file


This is blue








and a hello



text inside of <p>


#{Process.pid}
text node
other text node





ah
oh






var num1 = 8*4;

var num2 = 8*3;
alert("8 * 3 + 8 * 4 = " + (num1 + num2));

```

### Difference between single and double equals in Slang

* `=` inserts HTML with escaped characters
* `==` inserts HTML without escaping. It is needed when you have already rendered HTML and you need to insert it to your layout directly.

## TODO

- [x] Fix known limitations
- [ ] More tests
- [ ] Website
- [ ] Documentation

## Contributing

1. Fork it ( https://github.com/jeromegn/slang/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

## Contributors

- [jeromegn](https://github.com/jeromegn) Jerome Gravel-Niquet - creator, maintainer
- [kRaw1er](https://github.com/kRaw1er) Dmitry Neveshkin
- [elorest](https://github.com/elorest) Isaac Sloan