added externals arguement

README.md

@@ -25,8 +25,9 @@ module.exports = {
         orgName: "my-org",
         projectName: "my-app",
         entry: "src/single-spa-index.tsx", //defaults to src/index.js,
-        orgPackagesAsExternal: false // defaults to false. marks packages that has @my-org prefix as external so they are not included in the bundle
-        reactPackagesAsExternal: true // defaults to true. marks react and react-dom as external so they are not included in the bundle
+        orgPackagesAsExternal: false, // defaults to false. marks packages that has @my-org prefix as external so they are not included in the bundle
+        reactPackagesAsExternal: true, // defaults to true. marks react and react-dom as external so they are not included in the bundle
+        externals: ["react-router","react-router-dom"] // defaults to []. marks the specified modules as external so they are not included in the bundle
       },
     }]
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "craco-plugin-single-spa-application",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "Convert your CRA4 project into a single-spa application without ejecting or losing update support of react-scripts",
   "main": "src/index.js",
   "scripts": {

src/index.js

@@ -10,6 +10,7 @@ module.exports = {
       entry,
       orgPackagesAsExternal,
       reactPackagesAsExternal,
+      externals: userExternals = [],
     },
     context: { env },
   }) => {
@@ -33,7 +34,7 @@ module.exports = {
 
     delete webpackConfig.optimization;
 
-    let externals = ["single-spa"];
+    let externals = ["single-spa", ...userExternals];
 
     if (reactPackagesAsExternal !== false)
       externals = [...externals, "react", "react-dom"];