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justin808claude
justin808
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claude
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Fix React 19 webpack server rendering configuration
The previous commit incorrectly set target: 'node' unconditionally for all dummy apps, which broke ExecJS server rendering with the error: "TypeError: require is not a function" The issue: When target: 'node' is set without libraryTarget: 'commonjs2', webpack doesn't export the bundle properly for Node.js-style requires. Changes: - spec/dummy: Commented out target: 'node' (uses ExecJS, needs default 'web' target) - execjs-compatible-dummy: Commented out target: 'node' (uses ExecJS) - Pro dummy: Kept target: 'node' + added React 19 conditionNames fix (uses Node renderer) - Generator template: Commented out target: 'node' (default for new apps is ExecJS) The React 19 conditionNames fix is only needed when using target: 'node' with the Node renderer to prevent webpack from resolving to react-server condition. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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8 files changed

+34
-37
lines changed

8 files changed

+34
-37
lines changed

‎knip.ts‎

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@@ -38,9 +38,6 @@ const config: KnipConfig = {
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// This is an optional peer dependency because users without RSC don't need it
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// but Knip doesn't like such dependencies to be referenced directly in code
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'react-on-rails-rsc',
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// SWC transpiler dependencies used in dummy apps
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'@swc/core',
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'swc-loader',
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],
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},
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@@ -100,8 +97,6 @@ const config: KnipConfig = {
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'config/webpack/{production,development,test}.js',
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// Declaring this as webpack.config instead doesn't work correctly
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'config/webpack/webpack.config.js',
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// SWC configuration for Shakapacker
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'config/swc.config.js',
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],
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ignore: ['**/app-react16/**/*'],
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project: ['**/*.{js,cjs,mjs,jsx,ts,cts,mts,tsx}!', 'config/webpack/*.js'],

‎package.json‎

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@@ -19,7 +19,6 @@
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"@babel/preset-react": "^7.26.3",
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"@babel/preset-typescript": "^7.27.1",
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"@eslint/compat": "^1.2.7",
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"@swc/core": "^1.15.0",
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"@testing-library/dom": "^10.4.0",
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"@testing-library/jest-dom": "^6.6.3",
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"@testing-library/react": "^16.2.0",
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"react-dom": "^19.0.0",
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"react-on-rails-rsc": "19.0.2",
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"redux": "^4.2.1",
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"swc-loader": "^0.2.6",
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"ts-jest": "^29.2.5",
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"typescript": "^5.8.3",
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"typescript-eslint": "^8.35.0"

‎react_on_rails_pro/spec/dummy/config/webpack/serverWebpackConfig.js‎

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@@ -123,6 +123,16 @@ const configureServer = (rscBundle = false) => {
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serverWebpackConfig.node = false;
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// React 19 Fix: Prevent webpack from resolving to react-server condition
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// The server-bundle needs the full React with hooks for SSR, not the react-server build
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// Explicitly set conditionNames without react-server
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if (!serverWebpackConfig.resolve) {
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serverWebpackConfig.resolve = {};
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}
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// For target: 'node', webpack defaults to ['node', 'import', 'require', 'default']
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// We explicitly list them to ensure react-server is not included
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serverWebpackConfig.resolve.conditionNames = ['node', 'import', 'require', 'default'];
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return serverWebpackConfig;
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};
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‎react_on_rails_pro/spec/dummy/package.json‎

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@@ -79,7 +79,6 @@
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"@babel/preset-typescript": "^7.23.2",
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"@playwright/test": "^1.56.1",
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"@pmmmwh/react-refresh-webpack-plugin": "0.5.3",
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"@swc/core": "^1.15.0",
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"@tailwindcss/aspect-ratio": "^0.4.2",
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"@tailwindcss/forms": "^0.5.3",
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"@tailwindcss/typography": "^0.5.9",
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"jsdom": "^16.4.0",
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"pino-pretty": "^13.0.0",
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"preload-webpack-plugin": "^3.0.0-alpha.1",
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"swc-loader": "^0.2.6",
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"typescript": "^5.2.2",
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"webpack-dev-server": "^4.7.3"
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},

‎react_on_rails_pro/spec/execjs-compatible-dummy/config/webpack/serverWebpackConfig.js‎

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@@ -111,18 +111,18 @@ const configureServer = () => {
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// If using the default 'web', then libraries like Emotion and loadable-components
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// break with SSR. The fix is to use a node renderer and change the target.
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// React 19 requires target: 'node' to properly handle Node.js built-in modules
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serverWebpackConfig.target = 'node';
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// React 19 Fix: Prevent webpack from resolving to react-server condition
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// The server-bundle needs the full React with hooks for SSR, not the react-server build
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// Explicitly set conditionNames without react-server
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if (!serverWebpackConfig.resolve) {
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serverWebpackConfig.resolve = {};
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}
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// For target: 'node', webpack defaults to ['node', 'import', 'require', 'default']
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// We explicitly list them to ensure react-server is not included
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serverWebpackConfig.resolve.conditionNames = ['node', 'import', 'require', 'default'];
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// If using the React on Rails Pro node server renderer, uncomment the next lines
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// serverWebpackConfig.target = 'node';
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//
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// // React 19 Fix: Prevent webpack from resolving to react-server condition
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// // The server-bundle needs the full React with hooks for SSR, not the react-server build
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// // Explicitly set conditionNames without react-server
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// if (!serverWebpackConfig.resolve) {
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// serverWebpackConfig.resolve = {};
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// }
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// // For target: 'node', webpack defaults to ['node', 'import', 'require', 'default']
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// // We explicitly list them to ensure react-server is not included
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// serverWebpackConfig.resolve.conditionNames = ['node', 'import', 'require', 'default'];
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return serverWebpackConfig;
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};

‎react_on_rails_pro/spec/execjs-compatible-dummy/package.json‎

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},
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"devDependencies": {
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"@pmmmwh/react-refresh-webpack-plugin": "^0.5.15",
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"@swc/core": "^1.15.0",
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"react-refresh": "^0.14.2",
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"swc-loader": "^0.2.6",
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"webpack-dev-server": "4"
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}
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}

‎spec/dummy/config/webpack/serverWebpackConfig.js‎

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@@ -109,18 +109,18 @@ const configureServer = () => {
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// If using the default 'web', then libraries like Emotion and loadable-components
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// break with SSR. The fix is to use a node renderer and change the target.
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// React 19 requires target: 'node' to properly handle Node.js built-in modules
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serverWebpackConfig.target = 'node';
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// React 19 Fix: Prevent webpack from resolving to react-server condition
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// The server-bundle needs the full React with hooks for SSR, not the react-server build
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// Explicitly set conditionNames without react-server
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if (!serverWebpackConfig.resolve) {
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serverWebpackConfig.resolve = {};
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}
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// For target: 'node', webpack defaults to ['node', 'import', 'require', 'default']
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// We explicitly list them to ensure react-server is not included
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serverWebpackConfig.resolve.conditionNames = ['node', 'import', 'require', 'default'];
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// If using the React on Rails Pro node server renderer, uncomment the next lines
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// serverWebpackConfig.target = 'node';
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//
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// // React 19 Fix: Prevent webpack from resolving to react-server condition
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// // The server-bundle needs the full React with hooks for SSR, not the react-server build
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// // Explicitly set conditionNames without react-server
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// if (!serverWebpackConfig.resolve) {
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// serverWebpackConfig.resolve = {};
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// }
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// // For target: 'node', webpack defaults to ['node', 'import', 'require', 'default']
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// // We explicitly list them to ensure react-server is not included
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// serverWebpackConfig.resolve.conditionNames = ['node', 'import', 'require', 'default'];
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return serverWebpackConfig;
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};

‎spec/dummy/package.json‎

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"@babel/preset-react": "^7.10.4",
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"@pmmmwh/react-refresh-webpack-plugin": "^0.5.1",
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"@rescript/react": "^0.13.0",
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"@swc/core": "^1.15.0",
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"@types/react": "^19.0.0",
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"@types/react-dom": "^19.0.0",
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"@types/react-helmet": "^6.1.5",
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"sass-resources-loader": "^2.1.0",
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"shakapacker": "9.3.0",
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"style-loader": "^3.3.1",
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"swc-loader": "^0.2.6",
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"terser-webpack-plugin": "5.3.1",
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"url-loader": "^4.0.0",
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"webpack": "5.72.0",

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