From 351528b3e42940f6ee32ed09871d8107fc28d1ea Mon Sep 17 00:00:00 2001
From: Jy <1041207253@qq.com>
Date: Sun, 24 Jan 2021 09:34:47 +0800
Subject: [PATCH] =?UTF-8?q?fix(tree-select):=20=E5=88=A0=E9=99=A4=E7=88=B6?=
 =?UTF-8?q?=E8=8A=82=E7=82=B9=E7=9A=84=E6=9C=80=E5=90=8E=E4=B8=80=E4=B8=AA?=
 =?UTF-8?q?=E5=AD=90=E8=8A=82=E7=82=B9=E5=90=8E=E9=80=89=E4=B8=AD=E4=BA=86?=
 =?UTF-8?q?=E5=8F=A6=E5=A4=96=E7=9A=84=E5=AD=90=E8=8A=82=E7=82=B9.=20#3508?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 components/vc-tree-select/src/util.js | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/components/vc-tree-select/src/util.js b/components/vc-tree-select/src/util.js
index c0d30e884a..7f18f645fe 100644
--- a/components/vc-tree-select/src/util.js
+++ b/components/vc-tree-select/src/util.js
@@ -162,6 +162,7 @@ export function parseSimpleTreeData(treeData, { id, pId, rootPId }) {
 /**
  * Detect if position has relation.
  * e.g. 1-2 related with 1-2-3
+ * e.g. 1-2-3 related with 1-2-4
  * e.g. 1-3-2 related with 1
  * e.g. 1-2 not related with 1-21
  */
@@ -169,7 +170,14 @@ export function isPosRelated(pos1, pos2) {
   const fields1 = pos1.split('-');
   const fields2 = pos2.split('-');
 
-  const minLen = Math.min(fields1.length, fields2.length);
+  let minLen;
+  if (fields1.length === fields2.length) {
+    //  e.g. 1-2-3 related with 1-2-4
+    minLen = Math.max(fields1.length - 1, 0);
+  } else {
+    minLen = Math.min(fields1.length, fields2.length);
+  }
+
   for (let i = 0; i < minLen; i += 1) {
     if (fields1[i] !== fields2[i]) {
       return false;