[WEBPACK] 4. Webpack : CSS Loader (nghiepuit)

https://www.youtube.com/watch?v=yTc4Mk5cZF8&list=PLJ5qtRQovuEOqsMokakP9ue-y_jXhmCwJ&index=4

Ví dụ 1: css in js

C:\Users\Administrator\Desktop\webpack\webpack.config.js

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

C:\Users\Administrator\Desktop\webpack\package.json

{
  "name": "webpack",
  "version": "1.0.0",
  "description": "",
  "main": "webpack.config.js",
  "scripts": {
    "start": "webpack"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^8.1.0",
    "babel-preset-env": "^1.7.0",
    "css-loader": "^4.3.0",
    "style-loader": "^1.2.1",
    "webpack": "^4.44.2",
    "webpack-cli": "^3.3.12"
  },
  "devDependencies": {
    "@babel/core": "^7.11.6",
    "@babel/preset-env": "^7.11.5"
  }
}

C:\Users\Administrator\Desktop\webpack\src\index.js

import './image.css';
import './image.js';

C:\Users\Administrator\Desktop\webpack\src\image.js

const image = document.createElement("img");
image.src = "https://loremflickr.com/320/240";
image.alt = "Lorem ipsum dolor sit amet";
document.body.appendChild(image);

C:\Users\Administrator\Desktop\webpack\dist\index.html

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
</head>
<body>
	<p>Lorem ipsum dolor sit amet.</p>
	<script type="text/javascript" src="bundle.js"></script>
</body>
</html>

C:\Users\Administrator\Desktop\webpack\src\image.css

img {
	border: 5px solid red;
	padding: 5px;
}

Ví dụ 2: Tách file css

C:\Users\Administrator\Desktop\webpack\webpack.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const path = require('path');
module.exports = {
  mode: 'development',
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js'
  },
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: '[name].css',
      chunkFilename: '[id].css',
    }),
  ],
  module: {
  	rules: [
  		{
  			test: /\.js$/i,
  			exclude: /(node_modules)/,
  			use: 'babel-loader',
  		},
      {
        test: /\.css$/i,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: 'dist/',
            },
          },
          'css-loader',
        ],
      }
  	]
  }
};

C:\Users\Administrator\Desktop\webpack\dist\main.css

img {
	border: 5px solid red;
	padding: 5px;
}

C:\Users\Administrator\Desktop\webpack\package.json

{
  "name": "webpack",
  "version": "1.0.0",
  "description": "",
  "main": "webpack.config.js",
  "scripts": {
    "start": "webpack"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^8.1.0",
    "babel-preset-env": "^1.7.0",
    "css-loader": "^4.3.0",
    "style-loader": "^1.2.1",
    "webpack": "^4.44.2",
    "webpack-cli": "^3.3.12"
  },
  "devDependencies": {
    "@babel/core": "^7.11.6",
    "@babel/preset-env": "^7.11.5",
    "mini-css-extract-plugin": "^0.11.2"
  }
}

C:\Users\Administrator\Desktop\webpack\src\index.js

import './image.css';
import './image.js';

C:\Users\Administrator\Desktop\webpack\src\image.js

const image = document.createElement("img");
image.src = "https://loremflickr.com/320/240";
image.alt = "Lorem ipsum dolor sit amet";
document.body.appendChild(image);

C:\Users\Administrator\Desktop\webpack\dist\index.html

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
</head>
<body>
	<p>Lorem ipsum dolor sit amet.</p>
	<script type="text/javascript" src="bundle.js"></script>
</body>
</html>

C:\Users\Administrator\Desktop\webpack\src\image.css

img {
	border: 5px solid red;
	padding: 5px;
}
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