Fix render-components not loading for revealjs documents in Hub

hub-client/changelog.md

@@ -23,6 +23,10 @@ WASM rebuild is needed for a changelog-only edit.
 
 -->
 
+### 2026-09-02
+
+- [`ee47e8ec`](https://github.com/quarto-dev/q2/commits/ee47e8ec): Fix `render-components:` custom TSX overrides silently not loading for revealjs presentations.
+
 ### 2026-09-01
 
 - [`a4c3fb9c`](https://github.com/quarto-dev/q2/commits/a4c3fb9c): The experimental branch bar's Merge button now uses the app's standard accent color in both themes, and its branch-name input shows the standard keyboard focus ring.

hub-client/src/components/render/ReactRenderer.integration.test.tsx

@@ -300,6 +300,35 @@ describe('ReactRenderer render-components gate (Plan 2A item 13)', () => {
     });
   });
 
+  it('extracts customComponentsCode for revealjs format', () => {
+    // revealjs renders through the same Q2PreviewIframe/dispatcher tree as
+    // q2-preview (see ReactRenderer format routing describe block above),
+    // so render-components: must apply there too. The gate at the top of
+    // customComponentsCode's useMemo previously only allowed
+    // 'q2-debug' | 'q2-preview', silently skipping revealjs documents even
+    // though revealjs converged onto this same tree (bd-vwp4y5ku) — that
+    // convergence just never extended to this particular gate.
+    const fileContents = new Map([
+      ['elliot/simple.tsx', 'export const Para = () => null;'],
+    ]);
+
+    render(
+      <ReactRenderer
+        astJson={astWithRenderComponents(['/elliot/simple.tsx'])}
+        currentFilePath="elliot/index.qmd"
+        files={[]}
+        fileContents={fileContents}
+        onNavigateToDocument={() => {}}
+        setAst={() => {}}
+        format="revealjs"
+      />,
+    );
+
+    expect(lastCapturedPreviewCode()).toEqual({
+      '/elliot/simple.tsx': 'JS:export const Para = () => null;',
+    });
+  });
+
   it('q2-debug behavior unchanged (regression baseline)', () => {
     const fileContents = new Map([
       ['elliot/simple.tsx', 'export const Para = () => null;'],

hub-client/src/components/render/ReactRenderer.tsx

@@ -198,12 +198,17 @@ function ReactRenderer({
   );
 
   // Extract component paths - only recompute when the list of paths
-  // changes. The gate covers both q2-debug and q2-preview because both
-  // load user TSX overrides via the iframe's
+  // changes. The gate covers q2-debug, q2-preview, and revealjs because
+  // all three load user TSX overrides via the iframe's
   // `LOAD_CUSTOM_COMPONENTS` postMessage handler. Plan 2A item 13
-  // extended the q2-debug-only gate to also include q2-preview.
+  // extended the q2-debug-only gate to also include q2-preview. revealjs
+  // later converged onto the same Q2PreviewIframe tree (bd-vwp4y5ku), but
+  // this gate wasn't updated to match, so render-components: silently
+  // never loaded for revealjs documents in Hub, even though the CLI's
+  // q2-preview-spa has no such gate at all. That gap itself isn't tracked
+  // under any strand as of this fix.
   const componentPathsKey = useMemo(() => {
-    if (format !== 'q2-debug' && format !== 'q2-preview') {
+    if (format !== 'q2-debug' && format !== 'q2-preview' && format !== 'revealjs') {
       return '';
     }