打开http://localhost:8080/，控制台报错

Uncaught TypeError: Object(...) is not a functionat eval (vue-router.esm-bundler.js?f2fc:2127:1)at Object../node_modules/vue-router/dist/vue-router.esm-bundler.js (app.js:2218:1)at __webpack_require__ (app.js:679:30)at fn (app.js:89:20)at eval (index.js?3672:1:1)at Object../src/router/index.js (app.js:2358:1)at __webpack_require__ (app.js:679:30)at fn (app.js:89:20)at eval (main.js?1c90:1:1)at Object../src/main.js (app.js:2350:1)

cmd运行npm run dev没有报错，但也没有显示成功

看了好多篇文章，找了好几天的错，也没有找到解决方法，都不管用，找的心累了，这不终于整好了

【解决办法】： 降低vue-router版本

因为vue-router版本过高，所以报错（我的默认版本是4.0.14的版本）

"dependencies": {"element-ui": "^2.15.6","vue": "^2.5.2"},"devDependencies": {"node-sass": "^7.0.1","sass-loader": "^12.6.0","vue-loader": "^13.3.0","vue-router": "^4.0.14",} 

1、package.json中修改vue-router版本，然后再npm install下

2、或者在cmd输入

npm install vue-router@3.5.3

再运行npm run dev，成功了