From 41c45ff05b2740f1b4b045e8459300e5e97e434e Mon Sep 17 00:00:00 2001
From: liuxingbaoyu <30521560+liuxingbaoyu@users.noreply.github.com>
Date: Wed, 1 Jun 2022 02:29:01 +0800
Subject: [PATCH] improve typing

---
 packages/babel-core/src/transformation/util/clone-deep.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/packages/babel-core/src/transformation/util/clone-deep.ts b/packages/babel-core/src/transformation/util/clone-deep.ts
index 25e607dd7f65..7586ede32f5d 100644
--- a/packages/babel-core/src/transformation/util/clone-deep.ts
+++ b/packages/babel-core/src/transformation/util/clone-deep.ts
@@ -1,8 +1,10 @@
+import type { types } from "@babel/core";
+
 //https://github.com/babel/babel/pull/14583#discussion_r882828856
-function deepClone(value, cache) {
+function deepClone(value: any, cache: Map<any, any>): any {
   if (value !== null) {
     if (cache.has(value)) return cache.get(value);
-    let cloned;
+    let cloned: any;
     if (Array.isArray(value)) {
       cloned = new Array(value.length);
       for (let i = 0; i < value.length; i++) {
@@ -26,7 +28,7 @@ function deepClone(value, cache) {
   return value;
 }
 
-export default function (value) {
+export default function <T = types.Node>(value: T): T {
   if (typeof value !== "object") return value;
   return deepClone(value, new Map());
 }