webpack管理资源

加载css

webpack并不能处理js以外的静态资源，通过loader来支持他们

npm install --save-dev style-loader css-loader

  const path = require('path');

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

加载图片

file-loader可以处理图片资源，字体资源

npm install --save-dev file-loader


  import _ from 'lodash';
  import './style.css';
+ import icon from './icon.png';

  function component() {
    var element = document.createelement('div');

    // lodash，现在由此脚本导入
    element.innerhtml = _.join(['hello', 'webpack'], ' ');
    element.classlist.add('hello');

+   // 将图像添加到我们现有的 div。
+   var myicon = new image();
+   myicon.src = icon;
+
+   element.appendchild(myicon);

    return element;
  }

  document.body.appendchild(component());
  
//css里面引入也是没问题的
  .hello {
    color: red;
+   background: url('./icon.png');
  }
  
   const path = require('path');

module.exports = {
    entry: './src/index.js',
    output: {
      filename: 'bundle.js',
      path: path.resolve(__dirname, 'dist')
    },
    module: {
      rules: [
        {
          test: /\.css$/,
          use: [
            'style-loader',
            'css-loader'
          ]
        },
        {
          test: /\.(png|svg|jpg|gif)$/,
          use: [
            'file-loader'
          ]
        },
+       {
+         test: /\.(woff|woff2|eot|ttf|otf)$/,
+         use: [
+           'file-loader'
+         ]
+       }
      ]
    }
  };

加载数据

npm install --save-dev csv-loader xml-loader

  {
+         test: /\.(csv|tsv)$/,
+         use: [
+           'csv-loader'
+         ]
+       },
+       {
+         test: /\.xml$/,
+         use: [
+           'xml-loader'
+         ]
+       }