Clean Webpack Plugin: Maintain a Clean Build

The "CleanWebpackPlugin" is a popular plugin for Webpack that helps you manage your build output by cleaning up the specified directories before generating new files. This can be useful to prevent old or unnecessary files from accumulating in your build directory. Here's a brief explanation of how to use the CleanWebpackPlugin:


First, make sure you have Webpack and webpack-cli installed in your project, as shown in the previous explanations. Then, install the CleanWebpackPlugin:

npm install clean-webpack-plugin --save-dev


Open your webpack.config.js file and import the plugin:

const { CleanWebpackPlugin } = require('clean-webpack-plugin');

Inside the plugins array, instantiate the CleanWebpackPlugin:

module.exports = {
  // ...other configuration options

  plugins: [
    new CleanWebpackPlugin()
    // ...other plugins

By default, the plugin will clean the output.path defined in your Webpack configuration.

Custom Configuration

You can customize the behavior of the CleanWebpackPlugin by passing options to its constructor. For example:

new CleanWebpackPlugin({
  cleanOnceBeforeBuildPatterns: ['**/*', '!importantFile.txt']

In this example, all files and directories will be cleaned except for importantFile.txt.

Running Webpack

When you run Webpack to build your project, the CleanWebpackPlugin will automatically clean the specified directories before generating new build files.

Remember to refer to the official documentation of clean-webpack-plugin for more advanced configurations and options. This plugin can greatly help in maintaining a clean build output directory and avoiding unnecessary clutter.