7 classes are annotated with ContextReaction in Context 8.4

Blocks in src/Plugin/ContextReaction/Blocks.php

Provides a content reaction.

BodyClass in src/Plugin/ContextReaction/BodyClass.php

Provides a content reaction that adds a new css class.

Menu in src/Plugin/ContextReaction/Menu.php

Provides a content reaction that adds a css 'active' class to menu item.

PageTemplateSuggestions in src/Plugin/ContextReaction/PageTemplateSuggestions.php

Provides a content reaction that will let you change theme.

PageTitle in src/Plugin/ContextReaction/PageTitle.php

Provides a reaction that changes page title.

Regions in src/Plugin/ContextReaction/Regions.php

Provides a content reaction that will let you disable regions.

Theme in src/Plugin/ContextReaction/Theme.php

Provides a content reaction that will let you change theme.