TypeError: CleanwebpackPlugin is not a constructor
i'm trying to preview a vue web application through webpack-server-dev.I'm following this guide https://medium.com/the-web-tub/creating-your-first-vue-js-pwa-project-22f7c552fb34
The guide explains that the plugin is used to delete old and unused files in the dist directory. I have already tried replacing const CleanWebpackPlugin = require('clean-webpack-plugin') with const { CleanWebpackPlugin } = require('clean-webpack-plugin') which some posts suggest. i have also tried looking at the documentation on https://github.com/johnagan/clean-webpack-plugin but without succes as i am pretty new to this.
when i try to npm run dev i get this error
new CleanWebpackPlugin(['dist']),
^
TypeError: CleanWebpackPlugin is not a constructor
at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\webpack.config.js:56:5)
at handleFunction (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:21:13)
at prepareOptions (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:9:5)
at requireConfig (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:119:14)
at C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:125:17
at Array.forEach (<anonymous>)
at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:123:15)
at Object.<anonymous> (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-dev-server\bin\webpack-dev-server.js:79:40)
at Module._compile (internal/modules/cjs/loader.js:776:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
and this is the webpack.config.js file
const path = require('path')
const { VueLoaderPlugin } = require('vue-loader')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const CleanWebpackPlugin = require('clean-webpack-plugin')
module.exports = (env, argv) => ({
mode: argv && argv.mode || 'development',
devtool: (argv && argv.mode || 'development') === 'production' ? 'source-map' : 'eval',
entry: './src/app.js',
output: {
path: path.resolve(__dirname, 'dist'),
filename: '[name].js'
},
node: false,
module: {
rules: [
{
test: /\.vue$/,
loader: 'vue-loader'
},
{
test: /\.js$/,
loader: 'babel-loader'
},
{
test: /\.css$/,
use: [
'vue-style-loader',
'css-loader'
],
exclude: /\.module\.css$/
}
]
},
resolve: {
extensions: [
'.js',
'.vue',
'.json'
],
alias: {
'vue$': 'vue/dist/vue.esm.js',
'@': path.resolve(__dirname, 'src')
}
},
plugins: [
new CleanWebpackPlugin(['dist']),
new VueLoaderPlugin(),
new HtmlWebpackPlugin({
template: path.resolve(__dirname, 'static', 'index.html'),
inject: true
}),
new CopyWebpackPlugin([{
from: path.resolve(__dirname, 'static'),
to: path.resolve(__dirname, 'dist'),
toType: 'dir'
}])
],
optimization: {
splitChunks: {
chunks: 'all',
minSize: 30000,
maxSize: 0,
cacheGroups: {
vendors: {
test: /[\\/]node_modules[\\/]/,
priority: -10
},
default: {
minChunks: 2,
priority: -20,
reuseExistingChunk: true
}
}
},
runtimeChunk: {
name: entrypoint => `runtime~${entrypoint.name}`
},
mangleWasmImports: true,
removeAvailableModules: true,
removeEmptyChunks: true,
mergeDuplicateChunks: true
},
devServer: {
compress: true,
host: 'localhost',
https: true,
open: true,
overlay: true,
port: 9000
}
});
this is the error i get when using the right import as explained in the documenation :
throw new Error(`clean-webpack-plugin only accepts an options object. See:
^
Error: clean-webpack-plugin only accepts an options object. See:
https://github.com/johnagan/clean-webpack-plugin#options-and-defaults-optional
at new CleanWebpackPlugin (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\clean-webpack-plugin\dist\clean-webpack-plugin.js:27:13)
at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\webpack.config.js:56:5)
at handleFunction (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:21:13)
at prepareOptions (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:9:5)
at requireConfig (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:119:14)
at C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:125:17
at Array.forEach (<anonymous>)
at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:123:15)
at Object.<anonymous> (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-dev-server\bin\webpack-dev-server.js:79:40)
at Module._compile (internal/modules/cjs/loader.js:776:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
at startup (internal/bootstrap/node.js:283:19)
if i delete line 56 in webpack.config.js i can run the web application without problems, but i want to understand the source of this issue
Answer
The correct one is to use this import:
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
And then instead of passing an array with the distribution folder, change it to
plugins: [
new CleanWebpackPlugin(),
//...
]