Merge pull request #31772 from elaine-mattos/fix/frontend-plugin-template-dependencies

Fix frontend plugin template dependencies

.changeset/early-carpets-rush.md

@@ -0,0 +1,16 @@
+---
+'@backstage/cli': patch
+---
+
+Add missing peer/dev dependencies to the frontend plugin template.
+
+`react-dom` was not declared as a peer dependency, causing module resolution
+errors when generating plugins outside a Backstage monorepo. This adds
+`react-dom` to `peerDependencies` (for consuming apps) and `devDependencies`
+(for local development). `react-router-dom` is also added to `peerDependencies` (for consuming apps) and `devDependencies`
+to support routing during plugin development.
+
+Fixes:
+
+- Module not found: Can't resolve 'react-dom'
+- Module not found: Can't resolve 'react-router-dom'

packages/cli/templates/frontend-plugin/package.json.hbs

@@ -31,7 +31,9 @@
     "react-use": "{{versionQuery 'react-use' '17.2.4'}}"
   },
   "peerDependencies": {
-    "react": "{{versionQuery 'react' '^16.13.1 || ^17.0.0 || ^18.0.0'}}"
+    "react": "{{versionQuery 'react' '^16.13.1 || ^17.0.0 || ^18.0.0'}}",
+    "react-dom": "{{versionQuery 'react-dom' '^16.13.1 || ^17.0.0 || ^18.0.0'}}",
+    "react-router-dom": "{{versionQuery 'react-router-dom' '^6.0.0'}}"
   },
   "devDependencies": {
     "@backstage/cli": "{{versionQuery '@backstage/cli'}}",
@@ -42,7 +44,9 @@
     "@testing-library/react": "{{versionQuery '@testing-library/react' '14.0.0'}}",
     "@testing-library/user-event": "{{versionQuery '@testing-library/user-event' '14.0.0'}}",
     "msw": "{{versionQuery 'msw' '1.0.0'}}",
-    "react": "{{versionQuery 'react' '^16.13.1 || ^17.0.0 || ^18.0.0'}}"
+    "react": "{{versionQuery 'react' '^16.13.1 || ^17.0.0 || ^18.0.0'}}",
+    "react-dom": "{{versionQuery 'react-dom' '^16.13.1 || ^17.0.0 || ^18.0.0'}}",
+    "react-router-dom": "{{versionQuery 'react-router-dom' '^6.0.0'}}"
   },
   "files": [
     "dist"