webpack - 资源管理

1. 准备配置文件

dist/index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <title>Asset Management</title>
</head>
<body>
  <script src="bundle.js"></script>
</body>
</html>

webpack.config.js

const path = require('path');
 module.exports = {
   entry: './src/index.js',
   output: {
     filename: 'bundle.js',
     path: path.resolve(__dirname, 'dist'),
   },
 };

2. 加载CSS

  • 安装style-loader 与css-loader

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

  • 配置loader
const path = require('path');

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

src/style.css

.hello {
  color: red;
}

src/index.js

import _ from 'lodash';
import './style.css';

 function component() {
   const element = document.createElement('div');

   // Lodash, now imported by this script
   element.innerHTML = _.join(['Hello', 'webpack'], ' ');
   element.classList.add('hello');

   return element;
 }

 document.body.appendChild(component());

3. 加载图片

  • 配置loader

webpack.config.js

const path = require('path');

 module.exports = {
   entry: './src/index.js',
   output: {
     filename: 'bundle.js',
     path: path.resolve(__dirname, 'dist'),
   },
   module: {
     rules: [
       {
         test: /\.css$/i,
         use: ['style-loader', 'css-loader'],
       },
      {
        test: /\.(png|svg|jpg|jpeg|gif)$/i,
        type: 'asset/resource',
      },
     ],
   },
 };
  • 准备文件

src/style.css

.hello {
  color: red;
  background: url('./icon.png');
 }

src/index.js

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

 function component() {
   const element = document.createElement('div');

   // Lodash, now imported by this script
   element.innerHTML = _.join(['Hello', 'webpack'], ' ');
   element.classList.add('hello');

  // Add the image to our existing div.
  const myIcon = new Image();
  myIcon.src = Icon;

  element.appendChild(myIcon);

   return element;
 }

 document.body.appendChild(component());

4. 加载字体

  • 配置loader

webpack.config.js

const path = require('path');

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

src/style.css

font-face {
  font-family: 'MyFont';
  src: url('./my-font.woff2') format('woff2'),
    url('./my-font.woff') format('woff');
  font-weight: 600;
  font-style: normal;
}

.hello {
   color: red;
   font-family: 'MyFont';
   background: url('./icon.png');
 }

5. 加载数据

json数据格式是默认支持的

  • 安装csv文件加载器和xml文件加载器

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

  • 配置loader
const path = require('path');

 module.exports = {
   entry: './src/index.js',
   output: {
     filename: 'bundle.js',
     path: path.resolve(__dirname, 'dist'),
   },
   module: {
     rules: [
       {
         test: /\.css$/i,
         use: ['style-loader', 'css-loader'],
       },
       {
         test: /\.(png|svg|jpg|jpeg|gif)$/i,
         type: 'asset/resource',
       },
       {
         test: /\.(woff|woff2|eot|ttf|otf)$/i,
         type: 'asset/resource',
       },
      {
        test: /\.(csv|tsv)$/i,
        use: ['csv-loader'],
      },
      {
        test: /\.xml$/i,
        use: ['xml-loader'],
      },
     ],
   },
 };
  • 准备文件

src/data.xml

<?xml version="1.0" encoding="UTF-8"?>
<note>
  <to>Mary</to>
  <from>John</from>
  <heading>Reminder</heading>
  <body>Call Cindy on Tuesday</body>
</note>

src/data.csv

to,from,heading,body
Mary,John,Reminder,Call Cindy on Tuesday
Zoe,Bill,Reminder,Buy orange juice
Autumn,Lindsey,Letter,I miss you

src/index.js

import _ from 'lodash';
import './style.css';
import Icon from './icon.png';
import Data from './data.xml';
import Notes from './data.csv';

 function component() {
   const element = document.createElement('div');

   // Lodash, now imported by this script
   element.innerHTML = _.join(['Hello', 'webpack'], ' ');
   element.classList.add('hello');

   // Add the image to our existing div.
   const myIcon = new Image();
   myIcon.src = Icon;

   element.appendChild(myIcon);

  console.log(Data);
  console.log(Notes);

   return element;
 }

 document.body.appendChild(component());

6. 自定义JSON模块解析器

  • 安装解析器模块

npm install toml yamljs json5 --save-dev

  • 配置loader
const path = require('path');
const toml = require('toml');
const yaml = require('yamljs');
const json5 = require('json5');

 module.exports = {
   entry: './src/index.js',
   output: {
     filename: 'bundle.js',
     path: path.resolve(__dirname, 'dist'),
   },
   module: {
     rules: [
       {
         test: /\.css$/i,
         use: ['style-loader', 'css-loader'],
       },
       {
         test: /\.(png|svg|jpg|jpeg|gif)$/i,
         type: 'asset/resource',
       },
       {
         test: /\.(woff|woff2|eot|ttf|otf)$/i,
         type: 'asset/resource',
       },
       {
         test: /\.(csv|tsv)$/i,
         use: ['csv-loader'],
       },
       {
         test: /\.xml$/i,
         use: ['xml-loader'],
       },
      {
        test: /\.toml$/i,
        type: 'json',
        parser: {
          parse: toml.parse,
        },
      },
      {
        test: /\.yaml$/i,
        type: 'json',
        parser: {
          parse: yaml.parse,
        },
      },
      {
        test: /\.json5$/i,
        type: 'json',
        parser: {
          parse: json5.parse,
        },
      },
     ],
   },
 };
  • 准备文件

src/data.toml

title = "TOML Example"

[owner]
name = "Tom Preston-Werner"
organization = "GitHub"
bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
dob = 1979-05-27T07:32:00Z

src/data.yaml

title: YAML Example
owner:
  name: Tom Preston-Werner
  organization: GitHub
  bio: |-
    GitHub Cofounder & CEO
    Likes tater tots and beer.
  dob: 1979-05-27T07:32:00.000Z
src/data.json5

src/data.json5

{
  // comment
  title: 'JSON5 Example',
  owner: {
    name: 'Tom Preston-Werner',
    organization: 'GitHub',
    bio: 'GitHub Cofounder & CEO\n\
Likes tater tots and beer.',
    dob: '1979-05-27T07:32:00.000Z',
  },
}

src/index.js

import _ from 'lodash';
import './style.css';
import Icon from './icon.png';
import Data from './data.xml';
import Notes from './data.csv';
import toml from './data.toml';
import yaml from './data.yaml';
import json from './data.json5';

console.log(toml.title); // output `TOML Example`
console.log(toml.owner.name); // output `Tom Preston-Werner`

console.log(yaml.title); // output `YAML Example`
console.log(yaml.owner.name); // output `Tom Preston-Werner`

console.log(json.title); // output `JSON5 Example`
console.log(json.owner.name); // output `Tom Preston-Werner`

 function component() {
   const element = document.createElement('div');

   // Lodash, now imported by this script
   element.innerHTML = _.join(['Hello', 'webpack'], ' ');
   element.classList.add('hello');

   // Add the image to our existing div.
   const myIcon = new Image();
   myIcon.src = Icon;

   element.appendChild(myIcon);

   console.log(Data);
   console.log(Notes);

   return element;
 }

 document.body.appendChild(component());
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