From 02957e1fcfbab734a2879b52ba8cbd0b406632ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=A1=97=E8=A7=92=E5=B0=8F=E6=9E=97?= <1013335014@qq.com>
Date: Fri, 29 Mar 2024 15:51:32 +0800
Subject: [PATCH] =?UTF-8?q?Fix:=E4=BF=AE=E5=A4=8D=E5=BC=80=E5=90=AF?=
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---
 simple-mind-map/package.json                | 2 +-
 simple-mind-map/src/plugins/RainbowLines.js | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/simple-mind-map/package.json b/simple-mind-map/package.json
index 40a87e66..4cd651b1 100644
--- a/simple-mind-map/package.json
+++ b/simple-mind-map/package.json
@@ -1,6 +1,6 @@
 {
   "name": "simple-mind-map",
-  "version": "0.9.9-fix.1",
+  "version": "0.9.9-fix.2",
   "description": "一个简单的web在线思维导图",
   "authors": [
     {
diff --git a/simple-mind-map/src/plugins/RainbowLines.js b/simple-mind-map/src/plugins/RainbowLines.js
index 86205315..42bfaeb2 100644
--- a/simple-mind-map/src/plugins/RainbowLines.js
+++ b/simple-mind-map/src/plugins/RainbowLines.js
@@ -48,7 +48,9 @@ class RainbowLines {
 
   // 获取一个节点的第二层级的祖先节点
   getSecondLayerAncestor(node) {
-    if (node.layerIndex === 1) {
+    if (node.layerIndex === 0) {
+      return null
+    } else if (node.layerIndex === 1) {
       return node
     } else {
       let res = null
@@ -78,6 +80,7 @@ class RainbowLines {
     const { rainbowLinesConfig } = this.mindMap.opt
     if (!rainbowLinesConfig || !rainbowLinesConfig.open) return ''
     const ancestor = this.getSecondLayerAncestor(node)
+    if (!ancestor) return
     const index = getNodeDataIndex(ancestor)
     const colorsList = this.getColorsList()
     return colorsList[index % colorsList.length]