Use ?? for the perEventContextResolver check

tgriesser · Mar 23, 2020 · 1d0b6af · 1d0b6af
1 parent c9af2d1
commit 1d0b6af
Showing 1 changed file with 1 addition and 4 deletions.
diff --git a/src/subscription/subscribe.js b/src/subscription/subscribe.js
@@ -153,10 +153,7 @@ function subscribeImpl(
   // "ExecuteQuery" algorithm, for which `execute` is also used.
   // If `perEventContextResolver` is provided, it is invoked with the original
   // `contextValue` to return a new context unique to this `execute`.
-  const perEventContextResolverFn =
-    typeof perEventContextResolver === 'function'
-      ? perEventContextResolver
-      : ctx => ctx;
+  const perEventContextResolverFn = perEventContextResolver ?? (ctx => ctx);
 
   const mapSourceToResponse = payload =>
     execute({