Question

我正在尝试让FabricJs与Webpack和Electron合作，目前还没有让它工作。

Failed to compile.

    ./~/bindings/bindings.js
    76:22-40 Critical dependency: the request of a dependency is an expression

我试图用Webpack编译FabricJs时得到它。在Google和Stack Overflow上搜索过，我还没有找到合适的解决方案。

这是我在运行DEV compilin时收到的所有警告：

警告在./~/bindings/bindings.js中 76：22-40关键依赖：依赖的请求是表达式

     WARNING in ./~/bindings/bindings.js
     76:43-53 Critical dependency: the request of a dependency is an expression

 WARNING in ./~/ajv/lib/compile/index.js
 13:21-34 Critical dependency: the request of a dependency is an expression

 WARNING in ./~/ajv/lib/async.js
 96:20-33 Critical dependency: the request of a dependency is an expression

 WARNING in ./~/ajv/lib/async.js
 119:15-28 Critical dependency: the request of a dependency is an expression

在我的main.js代码中，这正是所写的

import Vue from 'vue'
import Electron from 'vue-electron'
import Router from 'vue-router'
import Store from 'vuex'
import {fabric} from 'fabric'

我已尝试加载它，例如import＆＃39; fabric＆＃39;或从＆＃39; fabric / dist / fabric.require＆＃39;进口面料。和许多其他方式，它总是得到我相同的结果。

webpack配置文件分为两个文件：webpack.main.config.js和webpack.renderer.config.js

以下是webpack.main.config.js的内容

'use strict'

process.env.BABEL_ENV = 'main'

const path = require('path')
const pkg = require('./app/package.json')
const settings = require('./config.js')
const webpack = require('webpack')

console.log(pkg.dependencies)

let mainConfig = {
  entry: {
    main: path.join(__dirname, 'app/src/main/index.js')
  },
  externals: Object.keys(pkg.dependencies || {}),
  module: {
    exprContextCritical: false,
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: /camo/
      },
      {
        test: /\.json$/,
        loader: 'json-loader'
      },
      {
        test: /\.node$/,
        loader: 'node-loader'
      }
    ]
  },
  node: {
    __dirname: false,
    __filename: false
  },
  output: {
    filename: '[name].js',
    libraryTarget: 'commonjs2',
    path: path.join(__dirname, 'app/dist')
  },
  plugins: [
    new webpack.NoEmitOnErrorsPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': '"production"'
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    })
  ],
  resolve: {
    extensions: ['.js', '.json', '.node'],
    modules: [
      path.join(__dirname, 'app/node_modules')
    ]
  },
  target: 'electron-main'
}

module.exports = mainConfig

这是webpack.renderer.config.js的内容

'use strict'

process.env.BABEL_ENV = 'renderer'

const path = require('path')
const pkg = require('./app/package.json')
const settings = require('./config.js')
const webpack = require('webpack')

const ExtractTextPlugin = require('extract-text-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')

const AssetsPlugins = require('assets-webpack-plugin')
const assetsPluginInstance = new AssetsPlugins()

let rendererConfig = {
  devtool: '#eval-source-map',
  devServer: { overlay: true },
  entry: {
    renderer: path.join(__dirname, 'app/src/renderer/main.js')
  },
  externals: Object.keys(pkg.dependencies || {}),
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: 'css-loader'
        })
      },
      {
        test: /\.html$/,
        use: 'vue-html-loader'
      },
      {
        test: /\.js$/,
        use: 'babel-loader',
        include: [ path.resolve(__dirname, 'app/src/renderer') ],
        exclude: /node_modules/
      },
      {
            test: /\.js$/,
            loader: 'babel-loader',
            include: /camo/
      },
      {
        test: /\.json$/,
        use: 'json-loader'
      },
      {
        test: /\.node$/,
        use: 'node-loader'
      },
      {
        test: /\.vue$/,
        use: {
          loader: 'vue-loader',
          options: {
            loaders: {
              sass: 'vue-style-loader!css-loader!sass-loader?indentedSyntax=1',
              scss: 'vue-style-loader!css-loader!sass-loader'
            }
          }
        }
      },
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        use: {
          loader: 'url-loader',
          query: {
            limit: 10000,
            name: 'imgs/[name].[ext]'
          }
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        use: {
          loader: 'url-loader',
          query: {
            limit: 10000,
            name: 'fonts/[name].[ext]'
          }
        }
      }
    ]
  },
  plugins: [
    assetsPluginInstance,
    new ExtractTextPlugin('styles.css'),
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: './app/index.ejs',
      appModules: process.env.NODE_ENV !== 'production'
        ? path.resolve(__dirname, 'app/node_modules')
        : false,
    }),
    new webpack.NoEmitOnErrorsPlugin()
  ],
  output: {
    filename: '[name].js',
    libraryTarget: 'commonjs2',
    path: path.join(__dirname, 'app/dist')
  },
  resolve: {
    alias: {
      'components': path.join(__dirname, 'app/src/renderer/components'),
      'renderer': path.join(__dirname, 'app/src/renderer')
    },
    extensions: ['.js', '.vue', '.json', '.css', '.node'],
    modules: [
      path.join(__dirname, 'app/node_modules'),
      path.join(__dirname, 'node_modules')
    ]
  },
  target: 'electron-renderer'
}


/**
 * Adjust rendererConfig for production settings
 */
if (process.env.NODE_ENV === 'production') {
  rendererConfig.devtool = ''

  rendererConfig.plugins.push(
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': '"production"'
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    })
  )
}

module.exports = rendererConfig

Answer 1

您是否在没有可选的cairo依赖项的情况下安装结构（仅在节点中需要/有用）？
npm install fabric --no-optional （见https://github.com/kangax/fabric.js/issues/2775）
我的解决方法最终使用script-loader，其功能与在＆lt; script＆gt;中包含fabric相同。浏览器中的标记（只是你获得了webpack捆绑的好处） import "!script-loader!../static/fabricjs/fabric.js" // window.fabric is now loaded 另外，我没有在npm上安装结构（因为它再次为节点安装了依赖项），但抓住了custom build - 虽然两者都可以正常工作。

Answer 2

使用script-loader加载它终于使它适用于我的设置。

对于使用vue + webpack + fabric的人来说，最好将结构调用放在组件或Vue上的mount（）方法中。

FabricJs，Webpack没有编译 - 关键依赖

2 个答案: