技術標籤：JSwebpackcryptonodejspolyfillfallback

Intro

使用node開發過程中引入了crypto，環境條件：
Windows 10
node v12.16.3
webpack 5.6.0

試圖啟動，報錯如下：

REAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for
 
 it.

If you want to include a polyfill, you need to:
        - add a fallback 'resolve.fallback: { "crypto": require.resolve("crypto-browserify") }'
        - install 'crypto-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
        resolve.
 
fallback: { "crypto": false }

解決

npm install crypto-browserify

配置package.json，新增以下配置項(其中browser與dependencies等配置項同級別)：

  "browser": {
    "crypto": false
  },

即整個package.json前後對比，新增的變動如下：

{
	// ...
  "browser": {
    "crypto": false
  },
  "dependencies"
 
: {
    "crypto-browserify": "^3.12.0",
    // ...
  }
}
``