Convert HTML to HAML

# How To Use In Your Ruby On Rails Application

HAML (HTML abstraction markup language) is a beautiful and elegant way to describe and design the HTML of your views. Instead of opening- and closing tags, HAML uses indentation for the structure of your pages

Examples:

File #new.html.erb
<h1><%= @page_name %></h1>
<p>This is my form</p>
<%= render "form" %>

And in HAML:

File: #new.html.haml %h1= @the_title
%p This is my form
= render 'form'

You see, the structure of the layout is much clearer than using HTML and ERB.

Installation

First install the gem using

gem install haml

and add the gem to the Gemfile

gem "haml"

For using HAML instead of HTML/ERB, just replace the file extensions of your views from file_name.html.erb to file_name.html.haml.

Quick tipps

Common elements like divs can be written in a short way

HTML

<div class="myclass">Write Content Here</div>

HAML

%div.myclass

HAML, shorthand

.myclass Write Content Here 

Attributes

HTML

<p class="myclass" id="myid">My paragraph</p>

HAML

%p{:class => "myclass", :id => "myid"} My paragraph

Inserting ruby code

You can insert ruby code with the = and - signs.

= link_to "Home", root_path

Code starting with = will be executed and embedded into the document.

Code starting with - will be executed, but not inserted into the document.