From 17bcaf8d23154047d72d13fd08b05c981f486c99 Mon Sep 17 00:00:00 2001
From: ktsn <ktsn@hey.com>
Date: Thu, 23 Jul 2020 16:43:58 +0800
Subject: [PATCH] fix: make mixins declaration backward compatible

---
 src/util.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/util.ts b/src/util.ts
index ff61202..3cdfbfa 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -46,6 +46,13 @@ export type MixedVueClass<
   ? VueClass<UnionToIntersection<ExtractInstance<T>>>
   : never
 
+// Retain legacy declaration for backward compatibility
+export function mixins <A> (CtorA: VueClass<A>): VueClass<A>
+export function mixins <A, B> (CtorA: VueClass<A>, CtorB: VueClass<B>): VueClass<A & B>
+export function mixins <A, B, C> (CtorA: VueClass<A>, CtorB: VueClass<B>, CtorC: VueClass<C>): VueClass<A & B & C>
+export function mixins <A, B, C, D> (CtorA: VueClass<A>, CtorB: VueClass<B>, CtorC: VueClass<C>, CtorD: VueClass<D>): VueClass<A & B & C & D>
+export function mixins <A, B, C, D, E> (CtorA: VueClass<A>, CtorB: VueClass<B>, CtorC: VueClass<C>, CtorD: VueClass<D>, CtorE: VueClass<E>): VueClass<A & B & C & D & E>
+
 export function mixins<T extends VueClass<Vue>[]>(...Ctors: T): MixedVueClass<T>
 export function mixins (...Ctors: VueClass<Vue>[]): VueClass<Vue> {
   return Vue.extend({ mixins: Ctors })