fix: js library default export to a unique name instead of default key in self (#36483)

app/client/src/workers/Evaluation/handlers/__tests__/jsLibrary.test.ts

@@ -11,7 +11,17 @@ declare const self: WorkerGlobalScope;
 
 describe("Tests to assert install/uninstall flows", function () {
   beforeAll(() => {
-    self.importScripts = jest.fn(() => {
+    self.importScripts = jest.fn((url: string) => {
+      if (url.includes("jspdf-autotable")) {
+        const defaultVar = function () {};
+
+        defaultVar.Cell = function () {};
+        self.Cell = function () {};
+        self.default = defaultVar;
+
+        return;
+      }
+
       self.lodash = {};
     });
 
@@ -150,4 +160,28 @@ describe("Tests to assert install/uninstall flows", function () {
       method: "Hello",
     });
   });
+
+  it("should install a library with default export", async function () {
+    const res = await installLibrary({
+      data: {
+        url: "https://cdn.jsdelivr.net/npm/jspdf-autotable@3.5.28/dist/jspdf.plugin.autotable.js",
+        takenAccessors: [],
+        takenNamesMap: {},
+      },
+      method: EVAL_WORKER_ASYNC_ACTION.INSTALL_LIBRARY,
+      webworkerTelemetry: {},
+    });
+
+    expect(self.importScripts).toHaveBeenCalled();
+    expect(mod.makeTernDefs).toHaveBeenCalledWith({});
+
+    expect(res).toEqual({
+      accessor: ["jspdf_plugin_autotable_js"],
+      defs: {
+        "!name": "LIB/jspdf_plugin_autotable_js",
+        jspdf_plugin_autotable_js: undefined,
+      },
+      success: true,
+    });
+  });
 });

app/client/src/workers/Evaluation/handlers/jsLibrary.ts

@@ -128,10 +128,40 @@ export async function installLibrary(
       // Find keys add that were installed to the global scope.
       const keysAfterInstallation = Object.keys(self);
 
-      accessors.push(
-        ...difference(keysAfterInstallation, envKeysBeforeInstallation),
+      const differentiatingKeys = difference(
+        keysAfterInstallation,
+        envKeysBeforeInstallation,
       );
 
+      if (
+        differentiatingKeys.length > 0 &&
+        differentiatingKeys.includes("default")
+      ) {
+        // Changing default export to library specific name
+        const uniqueName = generateUniqueAccessor(
+          url,
+          takenAccessors,
+          takenNamesMap,
+        );
+
+        // mapping default functionality to library name accessor
+        self[uniqueName] = self["default"];
+        // deleting the reference of default key from the self object
+        delete self["default"];
+        // mapping all the references of differentiating keys from the self object to the self[uniqueName] key object
+        differentiatingKeys.map((key) => {
+          if (key !== "default") {
+            self[uniqueName][key] = self[key];
+            // deleting the references from the self object
+            delete self[key];
+          }
+        });
+        // pushing the uniqueName to the accessor array
+        accessors.push(uniqueName);
+      } else {
+        accessors.push(...differentiatingKeys);
+      }
+
       /**
        * Check the list of installed library to see if their values have changed.
        * This is to check if the newly installed library overwrites an already existing one