Solution for ERROR in xx from UglifyJs keyword «const»

description¶

error message:

ERROR UglifyJs keyword «const»

1. The easiest solution to find (not recommended)¶

{
         test: /\.js$/,
         loader:'babel-loader',
         //exclude: /node_modules/, //After commenting, es5 conversion will be performed first, and then packaged and compressed
   }

This change has her reason, because: UglifyJsPlugin cannot compress es6 code, and some npm packages of es6 may be referenced in the project.

But: it may cause a new error! ! !

TypeError: $export is not a function

How to solve this error? If you look for a solution, you will find such an answer

{
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/,    // Need to add this line
}

2. Use terser-webpack-plugin (recommended)¶

The uglify-es used by uglifyjs-webpack-plugin is no longer maintained and replaced by a branch called terser. Therefore, webpack officially abandoned the use of uglifyjs-webpack-plugin, it is recommended to use terser-webpack-plugin.

• terser-webpack-plugin