Make Babel a dependency unless bundled

alphagov · Jun 19, 2023 · 31d01ac · 31d01ac
1 parent 303b220
commit 31d01ac
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Showing 3 changed files with 47 additions and 4 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/packages/govuk-frontend/package.json b/packages/govuk-frontend/package.json
@@ -53,6 +53,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.22.5",
+    "@babel/plugin-transform-runtime": "^7.22.5",
     "@babel/preset-env": "^7.22.5",
     "@rollup/plugin-babel": "^6.0.3",
     "@rollup/plugin-replace": "^5.0.2",
@@ -79,5 +80,8 @@
     "govuk-frontend-helpers": "*",
     "govuk-frontend-lib": "*",
     "govuk-frontend-tasks": "*"
+  },
+  "peerDependencies": {
+    "@babel/runtime": "^7.22.5"
   }
 }
diff --git a/packages/govuk-frontend/rollup.esm.config.mjs b/packages/govuk-frontend/rollup.esm.config.mjs
@@ -33,7 +33,11 @@ export default defineConfig(({ i: input }) => ({
       development: pkg.version
     }),
     babel({
-      babelHelpers: 'bundled'
+      babelHelpers: 'runtime',
+      plugins: ['@babel/plugin-transform-runtime']
     })
-  ]
+  ],
+
+  // Keep Babel as a dependency
+  external: (id) => id.includes('@babel/runtime')
 }))