01_Vue基础配置

安装

cnpm i webpack@3 vue vue-loader vue-template-compiler style-loader css-loader stylus-loader stylus url-loader file-loader --save

package.json

"scripts": {
    // 注意这里的webpack是指node_modules里面的webpack，而不是全局的
    "build": "webpack --config webpack.config.js"
}

webpack.config.js

const path = require('path');

module.exports = {
    entry: path.join(__dirname, 'src/index.js'),
    output: {
        filename: 'bundle.js',
        path: path.join(__dirname, 'dist')
    },
    module: {
        rules: [
            {
                test: /\.vue$/,
                loader: 'vue-loader'
            }
        ]
    }
};

css 和 img

{
    test: /\.css$/,
    use: [
        'style-loader',
        'css-loader'
    ]
},
{
    test: /\.(gif|jpg|jpeg|png|svg)$/,
    use: [
        {
            loader: 'url-loader',
            options: {
                limit: 1024,
                name: '[name]-aaa.[ext]'
            }
        }
    ]
}

然后可以直接这样引用

import './assets/styles/test.css';
import './assets/images/bg.jpeg';

css文件中也可以直接引用

background-image: url('../images/done.svg')

预处理

注意stylus-loader依赖stylus，所以两者要一起安装

{
    test: /\.styl/,
    use: [
        'style-loader',
        'css-loader',
        'stylus-loader'
    ]
}

webpack-dev-server

cnpm install webpack-dev-server@2 --save

用来区分不同的环境，不同的平台设置环境变量的方式是不一样的

cnpm i cross-env html-webpack-plugin --save

package.json

"scripts": {
  "test": "echo \"Error: no test specified\" && exit 1",
  "build": "cross-env NODE_ENV=production webpack --config webpack.config.js",
  "dev": "cross-env NODE_ENV=development webpack-dev-server --config webpack.config.js"
},

webpack.config.js

const path = require('path');
const HTMLPlugin = require('html-webpack-plugin');
const webpack = require('webpack');

const isDev = process.env.NODE_ENV === 'development';

const config = {
    target: 'web',
    
    module: {
        
    },
    plugins: [
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: isDev ? '"development"' : '"production"'
            }
        }),
        new HTMLPlugin()
    ]
};

if(isDev) {
    config.devServer = {
        port: 8000,
        host: '0.0.0.0',
        overlay: {
            errors: true
        }
    };
}

module.exports = config;

启动

npm run dev

调试和热加载

if(isDev) {
    // 调试
    config.devtool = '#cheap-module-eval-source-map';
    config.devServer = {
        port: 8000,
        host: '0.0.0.0',
        overlay: {
            errors: true
        },
        // 不刷新页面的情况下热加载
        hot: true
    };
    // 不刷新页面的情况下热加载
    config.plugins.push(
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    )
}

babelrc 和 postcss.config.js

cnpm install postcss-loader autoprefixer babel-loader babel-core --save
cnpm install babel-preset-env babel-plugin-transform-vue-jsx --save
cnpm install babel-helper-vue-jsx-merge-props --save
cnpm install babel-plugin-syntax-jsx --save

.babelrc

{
  "presets": [
    "env"
  ],
  "plugins": [
    "transform-vue-jsx"
  ]
}

postcss.config.js后处理器，帮助我们优化css

const autoprefixer = require('autoprefixer');

module.exports = {
  plugins: [
    autoprefixer()
  ]
};

webpack.config.js

{
    test: /\.jsx$/,
    loader: 'babel-loader'
}

{
    test: /\.styl/,
    use: [
        'style-loader',
        'css-loader',
        {
            loader: 'postcss-loader',
            options: {
                sourceMap: true
            }
        },
        'stylus-loader'
    ]
},

出现问题删除node_modules重装试试

CSS打包

非JS代码的东西打包成静态文件

cnpm i extract-text-webpack-plugin --save

const ExtractPlugin = require('extract-text-webpack-plugin');
const config = {
    output: {
        filename: 'bundle.[hash:8].js',
        path: path.join(__dirname, 'dist')
    }
};

if(isDev) {
  config.module.rules.push({
      test: /\.styl/,
      use: [
          'style-loader',
          'css-loader',
          {
              loader: 'postcss-loader',
              options: {
                  sourceMap: true
              }
          },
          'stylus-loader'
      ]
  });
} else {
  config.output.filename = '[name].[chunkhash:8].js';
  config.module.rules.push(
    {
      test: /\.styl/,
      use: ExtractPlugin.extract({
        fallback: 'style-loader',
        use: [
          'css-loader',
          {
              loader: 'postcss-loader',
              options: {
                  sourceMap: true
              }
          },
          'stylus-loader'
        ]
      })
    }
  );
  config.plugins.push(
    new ExtractPlugin('styles.[contentHash:8].css')
  )
}

module.exports = config;

类库代码单独打包

if(isDev) {
 
} else {
  config.entry = {
    app: path.join(__dirname, 'src/index.js'),
    vendor: ['vue']
  };
  config.plugins.push(
    new ExtractPlugin('styles.[contentHash:8].css'),
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor'
    }),
    new webpack.optimize.CommonsChunkPlugin({
      name: 'runtime'
    })
  )
}