From a9e092a1b0abfbdc67b4309af12a04b2d9056a7d Mon Sep 17 00:00:00 2001
From: Mauricio Alves <alves.mauricio.developer@gmail.com>
Date: Sat, 27 Apr 2024 18:57:54 -0300
Subject: [PATCH] feat: add support for reading the mapping of loaded imports
 (#2484)

---
 src/features/import-maps.js |  5 +++++
 test/system-core.mjs        | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/features/import-maps.js b/src/features/import-maps.js
index 3d6a66e2..130ba851 100644
--- 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
index 4e3d96f4..e6556810 100644
--- 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')
+      );
+    })
   });
 });