webpack使用(三)

创建时间：2017-03-14 投稿人：浏览次数：1039

这章了解下webpack和成熟框架vue 的集成.

一个很简单的vue,不含webpack

代码为c1 ,直接一个html文件，引入 vue.js 即可。不依赖其它

<html>
<head>
  <meta charset="utf-8">

</head>
<body>
<div id="app-5">
  <p>{{ message }}</p>
  <button v-on:click="reverseMessage">Reverse Message</button>
</div>
</body>

    <script src="./vue.js"></script>
    <script type="text/javascript">
        var app5 = new Vue({
          el: "#app-5",
          data: {
            message: "Hello Vue.js!"
          },
          methods: {
            reverseMessage: function () {
              this.message = this.message.split("").reverse().join("")
            }
          }
        })
    </script>

</html>

和webpack集成

vue-loader官网的例子直接是使用 vue-cli ，照着例子来生成一下

npm install -g vue-cli
vue init webpack-simple hello
cd hello
npm install
npm run dev

│  index.html
│  package.json
│  README.md
│  webpack.config.j s
│
├─node_modules
│  └─core-js
│      └─client
└─src
    │  App.vue
    │  main.js
    │
    └─assets
            logo.png

看看package.json

{
  "name": "c2",
  "description": "A Vue.js project",
  "version": "1.0.0",
  "author": "",
  "private": true,
  "scripts": {
    "dev": "cross-env NODE_ENV=development webpack-dev-server --open --hot",
    "build": "cross-env NODE_ENV=production webpack --progress --hide-modules"
  },
  "dependencies": {
    "vue": "^2.2.1"
  },
  "devDependencies": {
    "babel-core": "^6.0.0",
    "babel-loader": "^6.0.0",
    "babel-preset-latest": "^6.0.0",
    "cross-env": "^3.0.0",
    "css-loader": "^0.25.0",
    "file-loader": "^0.9.0",
    "vue-loader": "^11.1.4",
    "vue-template-compiler": "^2.2.1",
    "webpack": "^2.2.0",
    "webpack-dev-server": "^2.2.0"
  }
}

例子是用webpack2来搞,

webpack.config.js的配置

var path = require("path")
var webpack = require("webpack")

module.exports = {
  entry: "./src/main.js",
  output: {
    path: path.resolve(__dirname, "./dist"),
    publicPath: "/dist/",
    filename: "build.js"
  },
  module: {
    rules: [
      {
        test: /.vue$/,
        loader: "vue-loader",
        options: {
          loaders: {
          }
          // other vue-loader options go here
        }
      },
      {
        test: /.js$/,
        loader: "babel-loader",
        exclude: /node_modules/
      },
      {
        test: /.(png|jpg|gif|svg)$/,
        loader: "file-loader",
        options: {
          name: "[name].[ext]?[hash]"
        }
      }
    ]
  },
  resolve: {
    alias: {
      "vue$": "vue/dist/vue.esm.js"
    }
  },
  devServer: {
    historyApiFallback: true,
    noInfo: true
  },
  performance: {
    hints: false
  },
  devtool: "#eval-source-map"
}

if (process.env.NODE_ENV === "production") {
  module.exports.devtool = "#source-map"
  // http://vue-loader.vuejs.org/en/workflow/production.html
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      "process.env": {
        NODE_ENV: ""production""
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: {
        warnings: false
      }
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true
    })
  ])
}

嗯，加了一些loader 和 plugin,上面的不少东西都需要花时间去了解，不过我们平时使用的时候，直接用就行了,

扩展：在vue模板加less的支持

既然直接使用模板，那我们也要能扩展这些,如加个less
三个步骤
* 安装相关loader

npm install --save style-loader css-loader less-loader less

webpack.config.js增加loader配置

{
      test: /.less$/,
      use: [{
        loader: "style-loader" // creates style nodes from JS strings
      }, {
        loader: "css-loader" // translates CSS into CommonJS
      }, {
        loader: "less-loader" // compiles Less to CSS
      }]
    }

有了上面的配置，即可直接使用less了

vue文件中使用less,
在App.vue中的css部分改成:


<style lang="less">
#app {
  font-family: "Avenir", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}

h1, h2 {
  font-weight: normal;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  display: inline-block;
  margin: 0 10px;
}

@color: blue;
a {
  background-color: @color;
}
</style>

注意最下面的 @color:blue; 即less的语法

测试
直接使用npm run dev 即可看到效果

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