From bfd8db4e4bee61d3909eb7143bc3427f0ffe19e2 Mon Sep 17 00:00:00 2001
From: Guillaume <guillaume.b.chau@gmail.com>
Date: Sun, 4 Jul 2021 23:00:21 +0200
Subject: [PATCH] fea(useMutation): throws option

---
 packages/vue-apollo-composable/src/useMutation.ts       | 5 ++++-
 packages/vue-apollo-composable/src/util/useEventHook.ts | 5 +++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/vue-apollo-composable/src/useMutation.ts b/packages/vue-apollo-composable/src/useMutation.ts
index ffbfe9d..37ed4d4 100644
--- a/packages/vue-apollo-composable/src/useMutation.ts
+++ b/packages/vue-apollo-composable/src/useMutation.ts
@@ -14,6 +14,7 @@ export interface UseMutationOptions<
   TVariables = OperationVariables
 > extends Omit<MutationOptions<TResult, TVariables>, 'mutation'> {
   clientId?: string
+  throws?: 'auto' | 'always' | 'never'
 }
 
 type DocumentParameter<TResult, TVariables> = DocumentNode | Ref<DocumentNode> | ReactiveFunction<DocumentNode> | TypedDocumentNode<TResult, TVariables> | Ref<TypedDocumentNode<TResult, TVariables>> | ReactiveFunction<TypedDocumentNode<TResult, TVariables>>
@@ -96,7 +97,9 @@ export function useMutation<
       error.value = e
       loading.value = false
       errorEvent.trigger(e)
-      throw e
+      if (currentOptions.throws === 'always' || (currentOptions.throws !== 'never' && !errorEvent.getCount())) {
+        throw e
+      }
     }
   }
 
diff --git a/packages/vue-apollo-composable/src/util/useEventHook.ts b/packages/vue-apollo-composable/src/util/useEventHook.ts
index 73cec42..43bd7d1 100644
--- a/packages/vue-apollo-composable/src/util/useEventHook.ts
+++ b/packages/vue-apollo-composable/src/util/useEventHook.ts
@@ -21,9 +21,14 @@ export function useEventHook<TParam = any> () {
     }
   }
 
+  function getCount () {
+    return fns.length
+  }
+
   return {
     on,
     off,
     trigger,
+    getCount,
   }
 }