4.0.0.rc1

Almost six years after releasing v1.0.0, we're proud to ship the first release candidate of ViewComponent 4. This release marks a shift towards a Long Term Support model for the project, having reached significant feature maturity. While contributions are always welcome, we're unlikely to accept further breaking changes or major feature additions.

Please report any issues at https://github.com/ViewComponent/view_component/issues.

Breaking changes (production)

• Remove dependency on ActionView::Base, eliminating the need for capture compatibility patch. In some edge cases, this change may require switching to use the helpers. proxy.

• Require non-EOL Rails (>= 7.1.0) and Ruby (>= 3.2.0).

• Remove render_component and render monkey patch configured with render_monkey_patch_enabled.

• Remove deprecated use_helper(s). Use include MyHelper or helpers. proxy instead.

• Support compatibility with Dry::Initializer. As a result, EmptyOrInvalidInitializerError will no longer be raised.

• Remove default initializer from ViewComponent::Base. Previously, ViewComponent::Base defined a catch-all initializer that allowed components without an initializer defined to be passed arbitrary arguments.

• Remove use_deprecated_instrumentation_name configuration option. Events will always use render.view_component name.

• Remove unnecessary #format methods that returned nil.

• Remove support for variant names containing . to be consistent with Rails.

• Rename internal methods to have __vc_ prefix if they shouldn't be used by consumers. Make internal constants private. Make Collection#components, Slotable#register_polymorphic_slot private. Remove unused ComponentError class.

• Use ActionView's lookup_context for picking templates instead of the request format.

  3.15 added support for using templates that match the request format, that is if /resource.csv is requested then
  ViewComponents would pick _component.csv.erb over _component.html.erb.

  With this release, the request format is no longer considered and instead ViewComponent will use the Rails logic for picking the most appropriate template type, that is the csv template will be used if it matches the Accept header or because the controller uses a respond_to block to pick the response format.

Breaking changes (dev/test)

• Rename config.generate.component_parent_class to config.generate.parent_class.

• Remove config.test_controller in favor of vc_test_controller_class test helper method.

• config.component_parent_class is now config.generate.component_parent_class, moving the generator-specific option to the generator configuration namespace.

• Move previews-related configuration (enabled, route, paths, default_layout, controller) to under previews namespace.

• config.view_component_path is now config.generate.path, as components have long since been able to exist in any directory.

• --inline generator option now generates inline template. Use --call to generate #call method.

• Remove broken integration with rails stats that ignored components outside of app/components.

• Remove preview_source functionality. Consider using Lookbook instead.

• Use Nokogiri::HTML5 instead of Nokogiri::HTML4 for test helpers.

• Move generators to a ViewComponent namespace.

  Before, ViewComponent generators pollute the generator namespace with a bunch of top level items, and claim the generic "component" name.

  Now, generators live in a "view_component" module/namespace, so what was before rails g component is now rails g view_component:component.

New features

• Add SystemSpecHelpers for use with RSpec.
• Add support for including Turbo::StreamsHelper.
• Add template annotations for components with def call.
• Graduate SlotableDefault to be included by default.
• Add #current_template accessor and Template#path for diagnostic usage.
• Reduce string allocations during compilation.

Bug fixes

• Fix bug where virtual path wasn't reset, breaking translations outside of components.
• Fix bug where config.previews.enabled didn't function properly in production environments.
• Fix bug where response format wasn't set, which caused issues with Turbo Frames.
• Fix bug in SlotableDefault where default couldn't be overridden when content was passed as a block.
• Fix bug where request-aware helpers didn't work outside of the request context.
• ViewComponentsSystemTestController shouldn't be useable outside of test environment

Non-functional changes

• Remove unnecessary usage of ruby2_keywords.
• Remove unnecessary respond_to checks.
• Require MFA when publishing to RubyGems.
• Clean up project dependencies, relaxing versions of development gems.
• Add test case for absolute URL path helpers in mailers.
• Update documentation on performance to reflect more representative benchmark showing 2-3x speed increase over partials.
• Add documentation note about instrumentation negatively affecting performance.
• Remove unnecessary ENABLE_RELOADING test suite flag.
• config.previews.default_layout should default to nil.
• Add test coverage for uncovered code.
• Test against turbo-rails v2 and rspec-rails v7.

4.0.0.alpha7

• BREAKING: Remove deprecated use_helper(s). Use include MyHelper or helpers. proxy instead.

  Joel Hawksley

• BREAKING: Support compatibility with Dry::Initializer. As a result, EmptyOrInvalidInitializerError will no longer be raised.

  Joel Hawksley

• BREAKING: Rename config.generate.component_parent_class to config.generate.parent_class.

  Joel Hawksley

• Fix bug where config.previews.enabled did not function properly in production environments.

  Joel Hawksley

• config.previews.default_layout should default to nil.

  Joel Hawksley

• Add test case for absolute URL path helpers in mailers.

  Joel Hawksley

• Fix bug where response format wasn't set, which caused issues with Turbo Frames.

  Joel Hawksley

4.0.0.alpha6

• BREAKING: Remove config.test_controller in favor of vc_test_controller_class test helper method.

  Joel Hawksley

• BREAKING: config.component_parent_class is now config.generate.component_parent_class, moving the generator-specific option to the generator configuration namespace.

  Joel Hawksley

• BREAKING: Move previews-related configuration (enabled, route, paths, default_layout, controller) to under previews namespace.

  Joel Hawksley

• Add template annotations for components with def call.

  Joel Hawksley

• Add support for including Turbo::StreamsHelper.

  Stephen Nelson

• Update documentation on performance to reflect more representative benchmark showing 2-3x speed increase over partials.

  Joel Hawksley

• Add documentation note about instrumentation negatively affecting performance.

  Joel Hawksley

• Revert object shapes optimization due to lack of evidence of improvement.

  Joel Hawksley

v3.23.2

• Include .tt files in published gem. Fixes templates not being available when using generators.

  Florian Aßmann

v3.23.1

• Restore Rake tasks in published gem.

  Franz Liedke

v3.23.0

• Add docs about Slack channel in Ruby Central workspace. (Join us! #oss-view-component). Email [email protected] for an invite.

  *Joel Hawksley

• Do not include internal DocsBuilderComponent or YARD::MattrAccessorHandler in published gem.

  Joel Hawksley

• Only lock to concurrent-ruby 1.3.4 for Rails 6.1.

  Joel Hawksley

• Fix generation of ViewComponent documentation that was broken due to HTML safety issues.

  Simon Fish

• Add documentation on how ViewComponent works.

  Joel Hawksley

• Clarify that config.use_deprecated_instrumentation_name will be removed in v4.

  Joel Hawksley

• Run RSpec tests in CI.

  Joel Hawksley

4.0.0.alpha5

• BREAKING: config.view_component_path is now config.generate.path, as components have long since been able to exist in any directory.

  Joel Hawksley

• BREAKING: Remove broken integration with rails stats that ignored components outside of app/components.

  Joel Hawksley

• Add internal optimization for Ruby object shapes.

  Adam Hess, Joel Hawksley

4.0.0.alpha4

• BREAKING: Remove default initializer from ViewComponent::Base. Previously, ViewComponent::Base defined a catch-all initializer that allowed components without an initializer defined to be passed arbitrary arguments.

  Joel Hawksley

• Graduate SlotableDefault to be included by default.

  Joel Hawksley

• Fix bug in SlotableDefault where default couldn't be overridden when content was passed as a block.

  Bill Watts, Joel Hawksley

4.0.0.alpha3

• BREAKING: Remove dependency on ActionView::Base, eliminating the need for capture compatibility patch.

  Cameron Dutro

4.0.0.alpha2

• Add #current_template accessor and Template#path for diagnostic usage.

  Joel Hawksley