Add new getOverrideScopes API (#121)

* Add new getOverrideScopes API

* Remove manual test

.changeset/smart-colts-work.md

@@ -0,0 +1,5 @@
+---
+"import-map-overrides": minor
+---
+
+Add new getOverrideScopes API for inheriting scoped dependencies for overridden modules

docs/api.md

@@ -37,6 +37,46 @@ const overrideMapWithDisabledOverrides =
 */
 ```
 
+### getOverrideScopes
+
+Returns a Promise that resolves with an import map containing scopes for overridden modules. The scopes are inherited from the default map.
+
+```html
+<!--
+  When overriding the `a` module, it's possible to inherit the scopes for the not-overridden `a` module by calling the
+  `getOverrideScopes()` api and injecting an import map with those scopes
+-->
+<script type="importmap">
+  {
+    "imports": {
+      "a": "https://cdn.example.com/a/index.js",
+      "rxjs": "https://cdn.example.com/deps/rxjs@7.8.1/index.js"
+    },
+    "scopes": {
+      "https://cdn.example.com/a/": {
+        "rxjs": "https://cdn.example.com/deps/rxjs@7.6.0/index.js"
+      }
+    }
+  }
+</script>
+<script src="/import-map-overrides.js"></script>
+<script>
+  window.importMapOverrides.addOverride("a", "http:localhost:8080/a.js");
+  window.importMapOverrides.getOverrideScopes().then((map) => {
+    console.log(map);
+    /*
+      {
+        "scopes": {
+          "http://localhost:8080/": {
+            "rxjs": "https://cdn.example.com/deps/rxjs@7.6.0/index.js"
+          }
+        }
+      }
+    */
+  });
+</script>
+```
+
 ### addOverride
 
 A function that accepts a string `moduleName` and a string `url` as arguments. This will set up an override **which takes effect

eslint.config.mjs

@@ -25,7 +25,6 @@ export default [
     },
 
     rules: {
-      "es5/no-es6-methods": "error",
       "es5/no-es6-static-methods": "error",
       "es5/no-binary-and-octal-literals": "error",
       "es5/no-classes": "off",

package.json

@@ -76,5 +76,5 @@
   "dependencies": {
     "cookie": "^0.6.0"
   },
-  "packageManager": "pnpm@9.11.0"
+  "packageManager": "pnpm@9.12.1"
 }

src/api/js-api.js

@@ -147,6 +147,34 @@ function init() {
       fireChangedEvent();
       return hasItem;
     },
+    async getOverrideScopes() {
+      const scopes = {};
+      const defaultMap = await imo.getDefaultMap();
+      const overrideMap = imo.getOverrideMap();
+      for (let moduleName in overrideMap.imports) {
+        const defaultUrl = defaultMap.imports[moduleName];
+        if (defaultUrl) {
+          const defaultResolution = new URL(defaultUrl, window.location.href)
+            .href;
+          const overrideUrl = new URL(
+            overrideMap.imports[moduleName],
+            window.location.href,
+          ).href;
+          const overrideBase =
+            overrideUrl.slice(0, overrideUrl.lastIndexOf("/")) + "/";
+          for (let scope in defaultMap.scopes || {}) {
+            if (defaultResolution.startsWith(scope)) {
+              scopes[overrideBase] = {
+                ...(scopes[overrideBase] || {}),
+                ...defaultMap.scopes[scope],
+              };
+            }
+          }
+        }
+      }
+
+      return { scopes };
+    },
     resetOverrides() {
       Object.keys(imo.getOverrideMap(true).imports).forEach((moduleName) => {
         imo.removeOverride(moduleName);