feat(ssr): support custom directive getSSRProps in optimized compilation

close #5304

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

@@ -0,0 +1,26 @@
+import { ComponentPublicInstance, Directive } from '@vue/runtime-core'
+
+export function ssrGetDirectiveProps(
+  instance: ComponentPublicInstance,
+  dir: Directive,
+  value?: any,
+  arg?: string,
+  modifiers: Record<string, boolean> = {}
+): Record<string, any> {
+  if (typeof dir !== 'function' && dir.getSSRProps) {
+    return (
+      dir.getSSRProps(
+        {
+          dir,
+          instance,
+          value,
+          oldValue: undefined,
+          arg,
+          modifiers
+        },
+        null as any
+      ) || {}
+    )
+  }
+  return {}
+}

packages/server-renderer/src/index.ts

@@ -30,6 +30,7 @@ export {
 export { ssrInterpolate } from './helpers/ssrInterpolate'
 export { ssrRenderList } from './helpers/ssrRenderList'
 export { ssrRenderSuspense } from './helpers/ssrRenderSuspense'
+export { ssrGetDirectiveProps } from './helpers/ssrGetDirectiveProps'
 export { includeBooleanAttr as ssrIncludeBooleanAttr } from '@vue/shared'
 
 // v-model helpers