Node-Zopfli plugin for Webpack.
npm i -D zopfli-webpack-plugin
var ZopfliPlugin = require("zopfli-webpack-plugin");
module.exports = {
    plugins: [
        new ZopfliPlugin({
            asset: "[path].gz[query]",
            algorithm: "zopfli",
            test: /\.(js|html)$/,
            threshold: 10240,
            minRatio: 0.8
        })
    ]
}
 asset: The target asset name. [file] is replaced with the original asset. [path] is replaced with the path of the original asset and [query] with the query. Defaults to "[path].gz[query]".filename: A function(asset) which receives the asset name (after processing asset option) and returns the new asset name. Defaults to false.algorithm: Can be a function(buf, callback) or a string. For a string the algorithm is taken from zopfli.test: All assets matching this RegExp are processed. Defaults to every asset.threshold: Only assets bigger than this size are processed. In bytes. Defaults to 0.minRatio: Only assets that compress better that this ratio are processed. Defaults to 0.8.deleteOriginalAssets: Whether to delete the original assets or not. Defaults to false.| 
 Juho Vepsäläinen  |  
 Joshua Wiens  |  
 Kees Kluskens  |  
 Sean Larkin  |  
    © JS Foundation and other contributors
Licensed under the Creative Commons Attribution License 4.0.
    https://webpack.js.org/plugins/zopfli-webpack-plugin