Crystal
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ECR

module ECR

Overview

Embedded Crystal (ECR) is a template language for embedding Crystal code into other text, that includes but is not limited to HTML. The template is read and transformed at compile time and then embedded into the binary.

There are and syntax. The former will render returned values. The latter will not, but instead serve to control the structure as we do in Crystal.

Using a dash inside <...> either eliminates previous indentation or removes the next newline:

  • : removes previous indentation
  • : removes next newline
  • : removes previous indentation
  • : removes next newline

Quick Example:

require "ecr"

class Greeting
  def initialize(@name : String)
  end

  ECR.def_to_s "greeting.ecr"
end

# greeting.ecr
Greeting, <%= @name %>!

Greeting.new("John").to_s #=> Greeting, John!

Using logical statem