All links should open in a new tab

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Released
 
+### [0.2.0] - 2023-08-015
+- All links should open in a new tab [#9](https://github.com/alphagov/govuk-forms-markdown/issues/9)
+
 ### [0.1.0] - 2023-08-03
 
 - Initial release

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    govuk-forms-markdown (0.1.0)
+    govuk-forms-markdown (0.2.0)
       redcarpet (~> 3.6)
 
 GEM

lib/govuk-forms-markdown/renderer.rb

@@ -52,7 +52,7 @@ def triple_emphasis(text)
 
     def link(link, title, content)
       title_attribute = title.nil? ? "" : " title=\"#{title}\""
-      %(<a href="#{link}" class="govuk-link"#{title_attribute}>#{content}</a>)
+      %(<a href="#{link}" class="govuk-link"#{title_attribute} rel="noreferrer noopener" target="_blank">#{content}</a>)
     end
 
     def list(contents, list_type)

lib/govuk-forms-markdown/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module GovukFormsMarkdown
-  VERSION = "0.1.0"
+  VERSION = "0.2.0"
 end

lib/govuk_forms_markdown.rb

@@ -7,7 +7,7 @@ module GovukFormsMarkdown
   class Error < StandardError; end
 
   def self.render(markdown)
-    renderer = GovukFormsMarkdown::Renderer.new({ link_attributes: { class: "govuk-link" } })
+    renderer = GovukFormsMarkdown::Renderer.new({ link_attributes: { class: "govuk-link", rel: "noreferrer noopener", target: "_blank" } })
     Redcarpet::Markdown.new(renderer, no_intra_emphasis: true).render(markdown).strip
   end
 end

spec/govuk-forms-markdown/govuk_forms_markdown_spec.rb

@@ -75,13 +75,13 @@
 
   it "renders a URL in angle brackets with GOV.UK classes" do
     expect(render("<https://www.gov.uk/help>")).to eq(
-      '<p class="govuk-body"><a href="https://www.gov.uk/help" class="govuk-link">https://www.gov.uk/help</a></p>',
+      '<p class="govuk-body"><a href="https://www.gov.uk/help" class="govuk-link" rel="noreferrer noopener" target="_blank">https://www.gov.uk/help</a></p>',
     )
   end
 
   it "renders an email address in angle brackets with GOV.UK classes" do
     expect(render("<[email protected]>")).to eq(
-      '<p class="govuk-body"><a href="mailto:[email protected]" class="govuk-link">[email protected]</a></p>',
+      '<p class="govuk-body"><a href="mailto:[email protected]" class="govuk-link" rel="noreferrer noopener" target="_blank">[email protected]</a></p>',
     )
   end
 

spec/govuk-forms-markdown/renderer/link_spec.rb

@@ -6,13 +6,13 @@
 
   context "when there is no title" do
     it "renders a link" do
-      expect(renderer.link("https://example.com", nil, "Link content").strip).to eq "<a href=\"https://example.com\" class=\"govuk-link\">Link content</a>"
+      expect(renderer.link("https://example.com", nil, "Link content").strip).to eq "<a href=\"https://example.com\" class=\"govuk-link\" rel=\"noreferrer noopener\" target=\"_blank\">Link content</a>"
     end
   end
 
   context "when there is a title" do
     it "renders a link" do
-      expect(renderer.link("https://example.com", "Link title", "Link content").strip).to eq "<a href=\"https://example.com\" class=\"govuk-link\" title=\"Link title\">Link content</a>"
+      expect(renderer.link("https://example.com", "Link title", "Link content").strip).to eq "<a href=\"https://example.com\" class=\"govuk-link\" title=\"Link title\" rel=\"noreferrer noopener\" target=\"_blank\">Link content</a>"
     end
   end
 end