feat(SprocketsRenderer) use prerender: :static

Author: rmosolgo

lib/react/server_rendering/sprockets_renderer.rb

@@ -10,13 +10,19 @@ def initialize(options={})
       end
 
       def render(component_name, props)
+        # pass prerender: :static to use renderToStaticMarkup
+        react_render_method = "renderToString"
+        if props.is_a?(Hash) && props[:prerender] == :static
+          react_render_method = "renderToStaticMarkup"
+        end
+
         if !props.is_a?(String)
           props = props.to_json
         end
 
         js_code = <<-JS
           (function () {
-            var result = React.renderToString(React.createElement(#{component_name}, #{props}));
+            var result = React.#{react_render_method}(React.createElement(#{component_name}, #{props}));
             #{@replay_console ? CONSOLE_REPLAY : ""}
             return result;
           })()

test/react/server_rendering/sprockets_renderer_test.rb

@@ -16,6 +16,12 @@ class SprocketsRendererTest < ActiveSupport::TestCase
     assert_match(/<li.*write more tests<\/li>/, result)
   end
 
+  test '#render accepts prerender: :static' do
+    result = @renderer.render("Todo", {todo: "write more tests", prerender: :static})
+    assert_match(/<li>write more tests<\/li>/, result)
+    assert_no_match(/data-react-checksum/, result)
+  end
+
   test '#render replays console messages' do
     result = @renderer.render("TodoListWithConsoleLog", {todos: ["log some messages"]})
     assert_match('console.log.apply(console, ["got initial state"])', result)