关于vue运行报错：webpack ＜ 5 used to include polyfills for node.js core modules by default.

在使用vue3开发时安装使用web3等工具，运行报错

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

解决方案
1.安装 node-polyfill-webpack-plugin

npm install node-polyfill-webpack-plugin
1
2.vue.config.js中修改配置

// 头部引入
const NodePolyfillPlugin = require('node-polyfill-webpack-plugin')

configureWebpack: (config) => {
const plugins = []
plugins.push(new NodePolyfillPlugin())
}
// 或者
configureWebpack: {
plugins: [new NodePolyfillPlugin()],
}
再次运用，问题解决~

原因是由于在webpack5中移除了nodejs核心模块的polyfill自动引入，所以需要手动引入，如果打包过程中有使用到nodejs核心模块，webpack会提示进行相应配置
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 https://blog.youkuaiyun.com/FantasyWeirdo/article/details/123552064