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    mataodehtml的博客:记录一个vue项目报错UnhandledPromiseReject

    作者:[db:作者] 时间:2021-08-10 22:13

    使用vue-cli创建vue项目,加入一些之前的代码,然后打包运行报错:

    (node:4892) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing insi
    de of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection
     id: 1)
    (node:4892) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections
     that are not handled will terminate the Node.js process with a non-zero exit code.
     // 然后加卡在这里不动了
    18% building modules 72/73 modules 1 active ...ce-demo\weixin-vioce-demo\src\App.vue
    

    网上查阅了很多的资料,下面是我整理的解决方案:

    1. 在build文件夹下找到webpack.base.conf.js
      然后修改加入const vueLoaderPlugin = require(‘vue-loader/lib/plugin’)
    'use strict'
    const path = require('path')
    const utils = require('./utils')
    const config = require('../config')
    const vueLoaderConfig = require('./vue-loader.conf')
    //加入的
    const vueLoaderPlugin = require('vue-loader/lib/plugin')
    
    1. 在module.exports中引入 plugins:[new vueLoaderPlugin()]
     plugins:[
         new vueLoaderPlugin()
       ]
    
    1. 下面是我的文件的完整代码
    'use strict'
    const path = require('path')
    const utils = require('./utils')
    const config = require('../config')
    const vueLoaderConfig = require('./vue-loader.conf')
    const vueLoaderPlugin = require('vue-loader/lib/plugin')
    
    function resolve (dir) {
      return path.join(__dirname, '..', dir)
    }
    module.exports = {
      context: path.resolve(__dirname, '../'),
      entry: {
        app: './src/main.js'
      },
      output: {
        path: config.build.assetsRoot,
        filename: '[name].js',
        publicPath: process.env.NODE_ENV === 'production'
          ? config.build.assetsPublicPath
          : config.dev.assetsPublicPath
      },resolve: {
        extensions: ['.js', '.vue', '.json'],
        alias: {
          'vue$': 'vue/dist/vue.esm.js',
          '@': resolve('src'),
        }
      },
      module: {
        rules: [
          {
            test: /\.vue$/,
            loader: 'vue-loader',
            options: vueLoaderConfig
          },
          { test: /\.js$/,
            loader: 'babel-loader',
            include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
          },
          {
            test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
            loader: 'url-loader',
            options: {
              limit: 10000,
              name: utils.assetsPath('img/[name].[hash:7].[ext]')
            }
          },
          {test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
            loader: 'url-loader',
            options: {
              limit: 10000,
              name: utils.assetsPath('media/[name].[hash:7].[ext]')
            }
          },
          {test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
            loader: 'url-loader',
            options: {
              limit: 10000,
              name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
            }
          },
          {
            test: /\.sass$/,
            loaders: ['style', 'css', 'sass']
          },{
            test:/\.style$/,
            use:['style-loader','css-loader']
          }
        ]
      },
      node: {
        // prevent webpack from injecting useless setImmediate polyfill because Vue
        // source contains it (although only uses it if it's native).
        setImmediate: false,
        // prevent webpack from injecting mocks to Node native modules
        // that does not make sense for the client
        dgram: 'empty',
        fs: 'empty',
        net: 'empty',
        tls: 'empty',
        child_process: 'empty'
      },
      plugins:[
        new vueLoaderPlugin()
      ]
    }
    

    当以上解决之后再运行项目一般来说已经可以了,但是我这个项目还不行,继续其他错误

    $ webpack-dev-server --inline --progress --config build/webpack.dev.conf.js
    internal/modules/cjs/loader.js:638
        throw err;  
     	^
    Error: Cannot find module 'vue-loader/lib/plugin'
     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
        at Function.Module._load (internal/modules/cjs/loader.js:562:25)
        at Module.require (internal/modules/cjs/loader.js:690:17) at require (internal/modules/cjs/helpers.js:25:18)
        at Object.<anonymous> (D:\HBuilderProjects\baidu-vioce-demo\weixin-vioce-demo\build\webpack.base.conf.js:6:25)
        at Module._compile (internal/modules/cjs/loader.js:776:30)at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
        at Module.load (internal/modules/cjs/loader.js:653:32)
        at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
        at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    

    这种错误其实网上有很多解决方法
    主要的就是将对应的版本更新一下,就是对应的vue-loader这个插件的lib下面没有对应的plugin文件,具体做法:
    升级了一下 “vue-loader”: “^15.7.0” 就好了

    真棒!!

    cs
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