feat: add support for reading the mapping of loaded imports (#2484)

systemjs · Apr 27, 2024 · a9e092a · a9e092a
1 parent 3a5f73f
commit a9e092a
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diff --git a/src/features/import-maps.js b/src/features/import-maps.js
@@ -19,6 +19,11 @@ systemJSPrototype.prepareImport = function (doProcessScripts) {
   }
   return importMapPromise;
 };
+
+systemJSPrototype.getImportMap = function () {
+  return JSON.parse(JSON.stringify(importMap));
+};
+
 if (hasDocument) {
   processScripts();
   window.addEventListener('DOMContentLoaded', processScripts);

diff --git a/test/system-core.mjs b/test/system-core.mjs
@@ -272,6 +272,17 @@ describe('Core API', function () {
 
       assert([...loader.entries()].some(entry => entry[0] === 'http://i' && entry[1].a === 'b'));
     })
+
+    it('Supports System.getImportMap', function () {
+      const importMap = loader.getImportMap();
+
+      assert(
+        Object.hasOwn(importMap, 'imports') && 
+        Object.hasOwn(importMap, 'scopes') && 
+        Object.hasOwn(importMap, 'depcache') && 
+        Object.hasOwn(importMap, 'integrity')
+      );
+    })
   });
 });