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Programming language: Crystal
License: MIT License
Tags: Template Engine    

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README

Temel

Temel is a markup language for Crystal. A simpler alternative to HTML Builder.

  • Custom tag registration with a simple tag macro.
  • Supports Web Components.
  • Simpler DSL (comparing to HTML::Builder).
# Register tags first.
tag my_application
tag hello_world

get "/" do
  html(
    body({id: "main"},
      my_application hello_world "Hello World!"
    )
  )
end

Or, you can alternatively use block based syntax (Just like HTML::Builder) instead of argument based syntax:

get "/" do
  html do
    body({id: "main"}) do
      my_application hello_world "Hello World!"
    end
  end
end

The output will be:

<html>
  <body id="main">
    <my-application>
      <hello-world>Hello World!</hello-world>
    </my-application>
  </body>
</html>

Installation

Add this to your application's shard.yml:

dependencies:
  temel:
    github: f/temel

Usage

require "kemal"
require "temel"

get "/" do
  html(
    body(
      h1 "Hello World"
    )
  )
end

Using as Template Engine

You can use Temel as layout engine with functions.

# layout.tpl.cr
def layout(content)
  html(
    head(
      title("Hello")
    ),
    body(content)
  )
end

... just by using Crystal's internals, nothing more...

# hello.tpl.cr
require "layout.tpl"

def hello(where)
  layout("Hello #{where}")
end

... use it with Kemal makes everything better.

# main.cr
require "hello.tpl"

get "/" do |env|
  hello(env.params.where)
end

Argument Based DSL vs Block Based DSL

Argument based DSL is a bit different than HTML::Builder's.

Argument Based DSL

get "/" do
  html(
    head(
      script({src: "main.js"})
    ),
    body({id: "main"},
      h1 "Hello World!",
      p "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
    )
  )
end

Block Based DSL

get "/" do
  html do [
    head do
      script({src: "main.js"})
    end,
    body({id: "main"}) do [
      h1 "Hello World!",
      p "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
    ] end
  ] end
] end

Comments

You can add HTML comments with Temel.

get "/" do
  html(
    body(
      ul(
        comment("ko foreach: myItems"),
        li({"data-bind": "text: $data"}),
        comment("/ko")
      )
    )
  )
end

Using with Onyx

Works with Onyx seamlessly.*.

html
   head
      title "Testing it out!"
      script
         { type: "bad-script" }
         "my-fine-file.bad-ass"
   body
      div
         {id: "main-div"}

         if is-welcome ? h1 "Welcome" : h2 "This is it"

         article
            h2 "The fat and the furious"
            p
               "
               Long
               article text
               here
               and stuff, mkay Mr. {some-name}!
               "

               ul items.map(~> li _1).join

      div {id: "footer"},
         nav ul
            li a {href: "asdfsadf"}, "Contact"
            li a {href: "bfadfasdf.se"}, "About"

Development

You can extend the Temel by adding your own tags.

Adding a new tag

tag [tagname]

will register a new tag.

Contributing

  1. Fork it ( https://github.com/f/temel/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

  • f Fatih Kadir Akın - creator, maintainer