1 files changed, 18 insertions, 3 deletions

diff --git a/packages/service-preload/src/index.ts b/packages/service-preload/src/index.ts
index 3f54c0b..e42c406 100644
--- a/packages/service-preload/src/index.ts
+++ b/packages/service-preload/src/index.ts
@@ -18,7 +18,22 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { ipcRenderer } from 'electron';
-import { ServiceToMainIpcMessage } from '@sophie/service-shared';
+import { ipcRenderer, webFrame } from 'electron';
+import { ServiceToMainIpcMessage, webSource } from '@sophie/service-shared';
 
-ipcRenderer.send(ServiceToMainIpcMessage.ApiExposedInMainWorld);
+if (webFrame.parent === null) {
+  // Inject CSS to simulate `browserView.setBackgroundColor`.
+  // This is injected before the page loads, so the styles from the website will overwrite it.
+  webFrame.insertCSS('html { background-color: #fff; }');
+}
+
+const injectSource = webSource.safeParse(ipcRenderer.sendSync(ServiceToMainIpcMessage.ApiExposedInMainWorld));
+if (injectSource.success) {
+  webFrame.executeJavaScriptInIsolatedWorld(0, [
+    injectSource.data,
+  ]).catch((err) => {
+    console.log('Failed to inject source:', err);
+  });
+} else {
+  console.log('Invalid source to inject:', injectSource.error);
+}