update code

package.json

@@ -17,10 +17,10 @@
     "element-ui": "^2.15.13",
     "file-saver": "2.0.5",
     "js-cookie": "^3.0.5",
-    "less": "^4.1.3",
+    "less": "^4.1.3",    
     "less-loader": "^11.1.3",
     "vue": "^2.6.14",
-    "vue-router": "^4.2.2"
+    "vue-router": "^3.1.3"
   },
   "devDependencies": {
     "@babel/core": "^7.12.16",

vue.config.js

@@ -31,7 +31,7 @@ module.exports = defineConfig({
         }
       }     
     }
-  },
+  },  
   pages:{
     index:{
         entry:'src/pages/index.js',

yarn.lock

@@ -1644,11 +1644,6 @@
   optionalDependencies:
     prettier "^1.18.2 || ^2.0.0"
 
-"@vue/devtools-api@^6.5.0":
-  version "6.5.0"
-  resolved "https://registry.npmmirror.com/@vue/devtools-api/-/devtools-api-6.5.0.tgz#98b99425edee70b4c992692628fa1ea2c1e57d07"
-  integrity sha512-o9KfBeaBmCKl10usN4crU53fYtC1r7jJwdGKjPT24t348rHxgfpZ0xL3Xm/gLUYnc0oTp8LAmrxOeLyu6tbk2Q==
-
 "@vue/vue-loader-v15@npm:vue-loader@^15.9.7":
   version "15.10.1"
   resolved "https://registry.npmmirror.com/vue-loader/-/vue-loader-15.10.1.tgz#c451c4cd05a911aae7b5dbbbc09fb913fb3cca18"
@@ -5972,12 +5967,10 @@ vue-loader@^17.0.0:
     hash-sum "^2.0.0"
     watchpack "^2.4.0"
 
-vue-router@^4.2.2:
-  version "4.2.2"
-  resolved "https://registry.npmmirror.com/vue-router/-/vue-router-4.2.2.tgz#b0097b66d89ca81c0986be03da244c7b32a4fd81"
-  integrity sha512-cChBPPmAflgBGmy3tBsjeoe3f3VOSG6naKyY5pjtrqLGbNEXdzCigFUHgBvp9e3ysAtFtEx7OLqcSDh/1Cq2TQ==
-  dependencies:
-    "@vue/devtools-api" "^6.5.0"
+vue-router@^3.1.3:
+  version "3.6.5"
+  resolved "https://registry.npmmirror.com/vue-router/-/vue-router-3.6.5.tgz#95847d52b9a7e3f1361cb605c8e6441f202afad8"
+  integrity sha512-VYXZQLtjuvKxxcshuRAwjHnciqZVoXAjTjcqBTz4rKc8qih9g9pI3hbDjmqXaHdgL3v8pV6P8Z335XvHzESxLQ==
 
 vue-style-loader@^4.1.0, vue-style-loader@^4.1.3:
   version "4.1.3"