TypeError(‘Router.use() requires a middleware function but got a ‘ + gettype(fn))报错解决

小咪咪 2023-07-18 11:29 17阅读 0赞

###### 使用 express 报错 ######

C:\Users\DELL\Desktop\express-server-sweetmeats\server\node_modules\express\lib\
    router\index.js:458
          throw new TypeError('Router.use() requires a middleware function but got a
     ' + gettype(fn))
          ^
    
    TypeError: Router.use() requires a middleware function but got a Object
        at Function.use (C:\Users\DELL\Desktop\express-server-sweetmeats\server\node
    _modules\express\lib\router\index.js:458:13)
        at Function.<anonymous> (C:\Users\DELL\Desktop\express-server-sweetmeats\ser
    ver\node_modules\express\lib\application.js:220:21)
        at Array.forEach (<anonymous>)
        at Function.use (C:\Users\DELL\Desktop\express-server-sweetmeats\server\node
    _modules\express\lib\application.js:217:7)
        at Object.<anonymous> (C:\Users\DELL\Desktop\express-server-sweetmeats\serve
    r\app.js:48:5)
        at Module._compile (internal/modules/cjs/loader.js:955:30)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:991:10)
        at Module.load (internal/modules/cjs/loader.js:811:32)
        at Function.Module._load (internal/modules/cjs/loader.js:723:14)
        at Module.require (internal/modules/cjs/loader.js:848:19)
        at require (internal/modules/cjs/helpers.js:74:18)
        at Object.<anonymous> (C:\Users\DELL\Desktop\express-server-sweetmeats\serve
    r\bin\www:7:11)
        at Module._compile (internal/modules/cjs/loader.js:955:30)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:991:10)
        at Module.load (internal/modules/cjs/loader.js:811:32)
        at Function.Module._load (internal/modules/cjs/loader.js:723:14)

###### 这是因为没有导出 router ######

关注公众号：大明贵妇，无套路获取前端学习资料，期待各位客官来临  
![在这里插入图片描述][20201130111339821.jpg_pic_center]

[20201130111339821.jpg_pic_center]: /images/20230528/87c430db5a0042ee9515600ea73461a7.png