refactor: simplify suspense ssr + adjust behavior

packages/server-renderer/src/helpers/ssrRenderSuspense.ts

@@ -1,30 +1,14 @@
-import { PushFn, ResolvedSSRBuffer, createBuffer } from '../renderToString'
+import { PushFn } from '../renderToString'
 
-type ContentRenderFn = (push: PushFn) => void
-
-export async function ssrRenderSuspense({
-  default: renderContent,
-  fallback: renderFallback
-}: Record<string, ContentRenderFn | undefined>): Promise<ResolvedSSRBuffer> {
-  try {
-    if (renderContent) {
-      const { push, getBuffer } = createBuffer()
-      push(`<!--[-->`)
-      renderContent(push)
-      push(`<!--]-->`)
-      return await getBuffer()
-    } else {
-      return []
-    }
-  } catch {
-    if (renderFallback) {
-      const { push, getBuffer } = createBuffer()
-      push(`<!--[-->`)
-      renderFallback(push)
-      push(`<!--]-->`)
-      return getBuffer()
-    } else {
-      return []
-    }
+export async function ssrRenderSuspense(
+  push: PushFn,
+  { default: renderContent }: Record<string, (() => void) | undefined>
+) {
+  if (renderContent) {
+    push(`<!--[-->`)
+    renderContent()
+    push(`<!--]-->`)
+  } else {
+    push(`<!---->`)
   }
 }