Implement history_back stream helper

README.md

@@ -149,6 +149,7 @@ import 'controllers'
 
 ### Browser History Actions
 
+* `turbo_stream.history_back(**attributes)`
 * `turbo_stream.history_go(delta, **attributes)`
 * `turbo_stream.push_state(url, title = nil, state = nil, **attributes)`
 * `turbo_stream.replace_state(url, title = nil, state = nil, **attributes)`

lib/turbo_power/stream_helper.rb

@@ -167,6 +167,10 @@ def set_title(title, **attributes)
 
     # Browser History Actions
 
+    def history_back(**attributes)
+      custom_action :history_back, attributes: attributes
+    end
+
     def history_go(delta, **attributes)
       custom_action :history_go, attributes: attributes.merge(delta: delta)
     end

test/turbo_power/stream_helper/history_back_test.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+module TurboPower
+  module StreamHelper
+    class HistoryBackTest < StreamHelperTestCase
+      test "history_back" do
+        stream = %(<turbo-stream action="history_back"><template></template></turbo-stream>)
+
+        assert_dom_equal stream, turbo_stream.history_back
+      end
+    end
+  end
+end