Add option to FB renderer too

Author: sebmarkbage

packages/react-server-dom-relay/src/ReactDOMServerFB.js

@@ -28,6 +28,9 @@ import {
 
 type Options = {
   identifierPrefix?: string,
+  bootstrapScriptContent?: string,
+  bootstrapScripts: Array<string>,
+  bootstrapModules: Array<string>,
   progressiveChunkSize?: number,
   onError: (error: mixed) => void,
 };
@@ -46,7 +49,13 @@ function renderToStream(children: ReactNodeList, options: Options): Stream {
   };
   const request = createRequest(
     children,
-    createResponseState(options ? options.identifierPrefix : undefined),
+    createResponseState(
+      options ? options.identifierPrefix : undefined,
+      undefined,
+      options ? options.bootstrapScriptContent : undefined,
+      options ? options.bootstrapScripts : undefined,
+      options ? options.bootstrapModules : undefined,
+    ),
     createRootFormatContext(undefined),
     options ? options.progressiveChunkSize : undefined,
     options.onError,

packages/react-server-dom-relay/src/__tests__/ReactDOMServerFB-test.internal.js

@@ -48,6 +48,21 @@ describe('ReactDOMServerFB', () => {
     expect(result).toMatchInlineSnapshot(`"<div>hello world</div>"`);
   });
 
+  it('should emit bootstrap script src at the end', () => {
+    const stream = ReactDOMServer.renderToStream(<div>hello world</div>, {
+      bootstrapScriptContent: 'INIT();',
+      bootstrapScripts: ['init.js'],
+      bootstrapModules: ['init.mjs'],
+      onError(x) {
+        console.error(x);
+      },
+    });
+    const result = readResult(stream);
+    expect(result).toMatchInlineSnapshot(
+      `"<div>hello world</div><script>INIT();</script><script src=\\"init.js\\" async=\\"\\"></script><script type=\\"module\\" src=\\"init.mjs\\" async=\\"\\"></script>"`,
+    );
+  });
+
   it('emits all HTML as one unit if we wait until the end to start', async () => {
     let hasLoaded = false;
     let resolve;