From 9cd06f3b20171480be64811de111eef76601645a Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@youzan.com>
Date: Mon, 16 Dec 2019 20:00:36 +0800
Subject: [PATCH] feat(Checkbox): improve toggleAll perf (#5285)

---
 src/checkbox-group/index.js | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/checkbox-group/index.js b/src/checkbox-group/index.js
index b61a7d1e2..0f52b2717 100644
--- a/src/checkbox-group/index.js
+++ b/src/checkbox-group/index.js
@@ -24,10 +24,20 @@ export default createComponent({
   },
 
   methods: {
+    // @exposed-api
     toggleAll(checked) {
-      this.children.forEach(item => {
-        item.toggle(checked);
-      });
+      if (checked === false) {
+        this.$emit('input', []);
+        return;
+      }
+
+      let { children } = this;
+      if (!checked) {
+        children = children.filter(item => !item.checked);
+      }
+
+      const names = children.map(item => item.name);
+      this.$emit('input', names);
     }
   },