打包报错
TypeError: Cannot read property ‘tap’ of undefined
at HtmlWebpackPlugin.apply (D:\MyData\xiamy9\study\webpack-study\node_modules\html-webpack-plugin\index.js:40:31)
at WebpackCLI.webpack (D:\MyData\xiamy9\study\webpack-study\node_modules\webpack\lib\webpack.js:51:13)
at WebpackCLI.createCompiler (D:\MyData\xiamy9\study\webpack-study\node_modules\webpack-cli\lib\webpack-cli.js:1845:29)
at async WebpackCLI.buildCommand (D:\MyData\xiamy9\study\webpack-study\node_modules\webpack-cli\lib\webpack-cli.js:1952:20)
at async Command.<anonymous> (D:\MyData\xiamy9\study\webpack-study\node_modules\webpack-cli\lib\webpack-cli.js:742:25)
at async Promise.all (index 1)
at async Command.<anonymous> (D:\MyData\xiamy9\study\webpack-study\node_modules\webpack-cli\lib\webpack-cli.js:1289:13)
发现是版本问题：webpack4 和 html-webpack-plugin5 配合应用了，须要将 webpack 降级或者 html-webpack-plugin 降级。