Introduction

ERB stands for Embedded Ruby, and is used to insert Ruby variables inside templates, e.g. HTML and YAML. ERB is a Ruby class that accepts text, and evaluates and replaces Ruby code surrounded by ERB markup.

Syntax

• <% number = rand(10) %> this code will be evaluated
• <%= number %> this code will be evaluated and inserted into the output
• <%# comment text %> this comment will not be evaluated

Remarks

Conventions:

• ERB as a template: Abstract business logic into accompanied helper code, and keep your ERB templates clean and readable for people without Ruby knowledge.
• Append files with .erb: e.g. .js.erb, .html.erb, .css.erb, etc.