Feature: Conditionally render components with a new render? method.

[marcosvafilho]

Feature: Conditionally render components with a new render? method.

As discussed on the Discord channel, we would like to give developers the optionality to conditionally render components without littering views with conditional statements like if and unless.

This can now get easily done by overriding the render? method inside the component.

Instead of:

# some view

<% if current_user.admin? %>
  <%= Components::AdminComponent.(user: current_user) %>
<% end %>

It's possible to:

# some view

<%= Components::AdminComponent.(user: current_user) %>

# app/matestack/components/admin_component.rb

class AdminComponent < Matestack::Ui::Component
  required :user

  def render?
    context.user.admin?
  end

  def response
    div id: "admin-component" do
      plain "This component should only get rendered for admins"
    end
  end
end

Changes

• Add the render? method to Matestack::Ui::Core::Base
• Add a guard clause to escape the initialize method on Matestack::Ui::Core::Base if render? returns false
• Add spec tests
• Update docs with reference to this new feature

[jonasjabari]

Great idea and implementation! Thanks @marcosvafilho