Webpack destroying code in production

Question

I'm building an application using BitcoinJS, and have found that using the -p flag causes webpack to mangle certain parts, breaking the ability to produce transactions.

Example project available here (with install instructions, and how to reproduce): https://github.com/Someguy123/example-webpack-issue

Answer 1

The problem is that Uglify mangles too much by default in your case. As per bitcoinjs-lib instructions, you need to exclude certain names like this:

plugins: [

    new webpack.optimize.UglifyJsPlugin({

        mangle: {

            except: [

                'Array', 'BigInteger', 'Boolean', 'Buffer',

                'ECPair', 'Function', 'Number', 'Point'

            ]

        }

    })

]

Use webpack instead of webpack -p after configuring the plugin.

It will work.