fix(clerk-js): pass proxyUrl to createFapiClient (#4990)

Author: brkalow

.changeset/mighty-otters-remain.md

@@ -0,0 +1,5 @@
+---
+'@clerk/clerk-js': patch
+---
+
+Fix an issue where Clerk's `proxyUrl` was not being respected.

packages/clerk-js/src/core/__tests__/clerk.test.ts

@@ -2080,6 +2080,19 @@ describe('Clerk singleton', () => {
     });
   });
 
+  describe('proxyUrl', () => {
+    describe('when proxyUrl is set', () => {
+      test('fapiClient should use Clerk.proxyUrl as its baseUrl', async () => {
+        const sut = new Clerk(productionPublishableKey, {
+          proxyUrl: 'https://proxy.com/api/__clerk',
+        });
+        await sut.load({});
+
+        expect(sut.getFapiClient().buildUrl({ path: '/me' }).href).toContain('https://proxy.com/api/__clerk/v1/me');
+      });
+    });
+  });
+
   describe('buildUrlWithAuth', () => {
     it('builds an absolute url from a relative url in development', async () => {
       const sut = new Clerk(developmentPublishableKey);

packages/clerk-js/src/core/clerk.ts

@@ -314,6 +314,7 @@ export class Clerk implements ClerkInterface {
       getSessionId: () => {
         return this.session?.id;
       },
+      proxyUrl: this.proxyUrl,
     });
     // This line is used for the piggy-backing mechanism
     BaseResource.clerk = this;