cordova - npm run build = 没有图像

Question

我的项目 vuejs2 + webpack 遇到了问题...

当我为生产构建构建(npm run build)时，我的图像没有出现..

我没有在 webpack 配置中找到插件修改构建的位置，或者我可以用 vuejs 做些什么来实现它。

如果有人有想法或已经遇到过这个问题 - 那就太好了!

截图:

Run on dev is Ok no matter with 3 ways below

After build no images, no icons

感谢大家的回复，

vuejs 的 3 种方式运行 dev ok 但不在 run build

<template>
<div id="test">
    <img :src="urlLogo" />
  </div>
</template>
<script>
export default {
  name: 'Auth',
  data () {
    return {
      urlLogo: require('../../static/img/mylogo.png')
    }
  }
}
</script>

或者

<template>
<div id="test">
    <img src="/static/img/mylogo.png" />
  </div>
</template>

或者

<template>
<div id="test">
    <img src="~@/assets/img/mylogo.png" />
  </div>
</template>

这里是我的 config/index.js

'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.
const path = require('path')
module.exports = {
  dev: {
    // la config de dev
  },
  build: {
    // Template for index.html
    index: path.resolve(__dirname, '../www/dist/index.html'),
    // Paths
    assetsRoot: path.resolve(__dirname, '../www/dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '',
    /**
     * Source Maps
     */
     productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    bundleAnalyzerReport: process.env.npm_config_report
  }
}

build/webpack.prod.conf.js:

'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

const env = process.env.NODE_ENV === 'testing'
  ? require('../config/test.env')
  : require('../config/prod.env')

const webpackConfig = merge(baseWebpackConfig, {
  module: {
    rules: utils.styleLoaders({
      sourceMap: config.build.productionSourceMap,
      extract: true,
      usePostCSS: true
    })
  },
  devtool: config.build.productionSourceMap ? config.build.devtool : false,
  output: {
    path: config.build.assetsRoot,
    filename: utils.assetsPath('js/[name].[chunkhash].js'),
    chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
  },
  plugins: [
    // http://vuejs.github.io/vue-loader/en/workflow/production.html
    new webpack.DefinePlugin({
      'process.env': env
    }),
    new UglifyJsPlugin({
      uglifyOptions: {
        compress: {
          warnings: false
        }
      },
      sourceMap: config.build.productionSourceMap,
      parallel: true
    }),
    // extract css into its own file
    new ExtractTextPlugin({
      filename: utils.assetsPath('css/[name].[contenthash].css'),
      // Setting the following option to `false` will not extract CSS from codesplit chunks.
      // Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
      // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`, 
      // increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
      allChunks: true,
    }),
    // Compress extracted CSS. We are using this plugin so that possible
    // duplicated CSS from different components can be deduped.
    new OptimizeCSSPlugin({
      cssProcessorOptions: config.build.productionSourceMap
        ? { safe: true, map: { inline: false } }
        : { safe: true }
    }),
    // generate dist index.html with correct asset hash for caching.
    // you can customize output by editing /index.html
    // see https://github.com/ampedandwired/html-webpack-plugin
    new HtmlWebpackPlugin({
      filename: process.env.NODE_ENV === 'testing'
        ? 'index.html'
        : config.build.index,
      template: 'index.html',
      inject: true,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency'
    }),
    // keep module.id stable when vendor modules does not change
    //new webpack.HashedModuleIdsPlugin(),
    // enable scope hoisting
    new webpack.optimize.ModuleConcatenationPlugin(),
    // split vendor js into its own file
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor',
      minChunks (module) {
        // any required modules inside node_modules are extracted to vendor
        return (
          module.resource &&
          /\.js$/.test(module.resource) &&
          module.resource.indexOf(
            path.join(__dirname, '../node_modules')
          ) === 0
        )
      }
    }),
    // extract webpack runtime and module manifest to its own file in order to
    // prevent vendor hash from being updated whenever app bundle is updated
    new webpack.optimize.CommonsChunkPlugin({
      name: 'manifest',
      minChunks: Infinity
    }),
    // This instance extracts shared chunks from code splitted chunks and bundles them
    // in a separate chunk, similar to the vendor chunk
    // see: https://webpack.js.org/plugins/commons-chunk-plugin/#extra-async-commons-chunk
    new webpack.optimize.CommonsChunkPlugin({
      name: 'app',
      async: 'vendor-async',
      children: true,
      minChunks: 3
    }),

    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.build.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]
})

if (config.build.productionGzip) {
  const CompressionWebpackPlugin = require('compression-webpack-plugin')

  webpackConfig.plugins.push(
    new CompressionWebpackPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: new RegExp(
        '\\.(' +
        config.build.productionGzipExtensions.join('|') +
        ')$'
      ),
      threshold: 10240,
      minRatio: 0.8
    })
  )
}

if (config.build.bundleAnalyzerReport) {
  const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
  webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}

module.exports = webpackConfig

build/build.js:

'use strict'
require('./check-versions')()

process.env.NODE_ENV = 'production'

const ora = require('ora')
const rm = require('rimraf')
const path = require('path')
const chalk = require('chalk')
const webpack = require('webpack')
const config = require('../config')
const webpackConfig = require('./webpack.prod.conf')

const spinner = ora('building for production...')
spinner.start()

rm(path.join(config.build.assetsRoot, config.build.assetsSubDirectory), err => {
  if (err) throw err
  webpack(webpackConfig, (err, stats) => {
    spinner.stop()
    if (err) throw err
    process.stdout.write(stats.toString({
      colors: true,
      modules: false,
      children: false, // If you are using ts-loader, setting this to true will make TypeScript errors show up during build.
      chunks: false,
      chunkModules: false
    }) + '\n\n')

    if (stats.hasErrors()) {
      console.log(chalk.red('  Build failed with errors.\n'))
      process.exit(1)
    }

    console.log(chalk.cyan('  Build complete.\n'))
    console.log(chalk.yellow(
      '  Tip: built files are meant to be served over an HTTP server.\n' +
      '  Opening index.html over file:// won\'t work.\n'
    ))
  })
})

Answer 1

您提供的代码中有两个问题，第一个“供引用”，第二个是问题的原因。

首先，Android 上的 cordova 应用托管在 file:///android_asset/www/ ，而不是像在浏览器或 iOS 上那样的根目录。这意味着:绝对 URL 不适用于 Android 上的 cordova。您需要更改 src 属性以使用相对 URL，相对于磁盘上包含您的模板的文件(例如您的 .vue 文件)。当 webpack 处理文件时，它会正确地将相对 URL 替换为 bundle 中的图像。

其次(也是更重要的是)，您的 webpack 配置似乎没有提及任何关于 .vue 文件的内容，我假设您正在存储 Vue.js 2 模板，因此 webpack 是实际上并没有处理 .vue 文件。你需要使用类似 vue-loader webpack plugin 的东西允许 webpack 处理你的单文件组件。

看看 documentation for vue-loader ，或使用类似 webpack-simple boilerplate 的东西作为了解您需要包含哪些配置的起点。

您可以运行以下命令以快速获得包含热重载的示例:

npm install -g @vue/cli
vue create hello
cd hello
npm run serve

这是我与 Webpack 2 一起使用的相应配置(看起来您出于某种原因正在使用 Webpack 1)是:

module: {
    rules: [
        ...
            {
                test: /\.vue$/,
                loader: 'vue-loader',
                options: {
                    loaders: utils.cssLoaders({
                        sourceMap: isProduction
                            ? config.build.productionSourceMap
                            : config.dev.cssSourceMap,
                        extract: isProduction
                    })
                }
            },
        ...
    ]
}

如果您仍然遇到问题或无法解决问题，请尝试使用 Chrome Dev Tools to debug the app running in the Android emulator探索最终在模拟器中运行的内容。这将为您(我和其他人)提供更多关于可能出现问题的线索!