vue运行报错：SyntaxError: Cannot use import statement outside a module

左手的ㄟ右手 2022-12-31 14:28 551阅读 0赞

![4f7a6168858950498b69198dc2cf5b7c.png][]

PS C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin> npm run dev
    
    > vue-element-admin@4.2.1 dev C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin
    > vue-cli-service serve
    
     INFO  Starting development server...
     10% building 2/2 modules 0 active ERROR  SyntaxError: Cannot use import statement outside a module
    C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\mock\index.js:1
    import "core-js/modules/es6.regexp.constructor";
    ^^^^^^
    
    SyntaxError: Cannot use import statement outside a module
        at wrapSafe (internal/modules/cjs/loader.js:1072:16)
        at Module._compile (internal/modules/cjs/loader.js:1122:27)
        at Module._compile (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\node_modules\pirates\lib\index.js:99:24)
        at Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
        at Object.newLoader [as .js] (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\node_modules\pirates\lib\index.js:104:7)
        at Module.load (internal/modules/cjs/loader.js:1002:32)
        at Function.Module._load (internal/modules/cjs/loader.js:901:14)
        at Module.require (internal/modules/cjs/loader.js:1044:19)
        at require (internal/modules/cjs/helpers.js:77:18)
        at registerRoutes (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\mock\mock-server.js:11:30)
        at Object.module.exports [as before] (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\mock\mock-server.js:57:22)
        at Object.before (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\node_modules\@vue\cli-service\lib\commands\serve.js:165:67)
        at Server.setupBeforeFeature (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\node_modules\webpack-dev-server\lib\Server.js:455:18)
        at Object.before (C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\node_modules\webpack-dev-server\lib\Server.js:515:16)
        at C:\Users\wangting\Desktop\assets_web_admin\assets_web_admin\node_modules\webpack-dev-server\lib\Server.js:584:24
        at Array.forEach (<anonymous>)

原来是我在写代码的时候  
不小心删掉了这段代码

打开  
环境配置.env.development文件  
在最后面加上

VUE_CLI_BABEL_TRANSPILE_MODULES = true

这个文件完整的代码如下  
还是改一下随手乱动代码的习惯吧~~~

# just a flag
    ENV = 'development'
    
    # base api
    VUE_APP_BASE_API = '/dev-api'
    
    # vue-cli uses the VUE_CLI_BABEL_TRANSPILE_MODULES environment variable,
    # to control whether the babel-plugin-dynamic-import-node plugin is enabled.
    # It only does one thing by converting all import() to require().
    # This configuration can significantly increase the speed of hot updates,
    # when you have a large number of pages.
    # Detail:  https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/babel-preset-app/index.js
    
    VUE_CLI_BABEL_TRANSPILE_MODULES = true

![ca4b5dba0ce33b5e10b45e655fc55ffa.png][]

再次执行  
npm run dev  
即可运行成功了

[4f7a6168858950498b69198dc2cf5b7c.png]: /images/20221120/f1f4604323244ddd94d7cd7ac8fbeacf.png
[ca4b5dba0ce33b5e10b45e655fc55ffa.png]: https://img-blog.csdnimg.cn/img_convert/ca4b5dba0ce33b5e10b45e655fc55ffa.png