📝: demo03 README

Author: Leecason

demo03/README.md

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+## Demo03 使用 `chunkhash`
+
+**`webpack` 配置文件中将 `[hash]` 替换为 `[chunkhash]`**
+
+```js
+// webpack.config.js
+module.exports = {
+ mode: 'production',
+ entry: {
+ index: './src/index.js',
+ },
+ output: {
+ path: path.join(__dirname, 'dist'),
+ filename: '[name]_[chunkhash:8].js',
+ },
+ optimization: {
+ runtimeChunk: true,
+ splitChunks: {
+ chunks: 'all'
+ },
+ },
+};
+```
+
+**打包结果 Output**
+
+> 见 dist 文件夹
+
+```zsh
+ Asset Size Chunks Chunk Names
+ index_201f4e93.js 168 bytes 0 [emitted] index
+runtime~index_2f124e9a.js 1.46 KiB 1 [emitted] runtime~index
+vendors~index_07bff0e7.js 69.7 KiB 2 [emitted] vendors~index
+```
+
+打包后3个文件都带有不同的 `hash` 值。