Doesn't work properly when webpack has minimization enabled

[grumd]

I have svg-to-pdfkit working completely fine in web when building with webpack, but as soon as I just flip "optimization.minimize: false" to "optimization.minimize: true" in webpack, fill with <pattern> stops working and all I see is solid black fill.

Using latest version for PDFKit and this plugin, and webpack 5.

It's a long shot posting here but I'm just feeling lucky, maybe anyone has an idea what can cause black fill instead of pattern fill... Really hard to debug webpack's minimizer. I tried putting all the pdf-related modules into "excludes" for TerserPlugin but it didn't help.

[grumd]

I didn't really understand how exactly terser breaks svg-to-pdfkit, but I was able to create a separate chunk for this package, and then disable TerserPlugin only for that chunk

[pjrocks70]

To fix this issue I have used fnames: true in terseroptions.

new TerserPlugin({
					extractComments: false,
					terserOptions: {
						keep_classnames: true,
						keep_fnames: true,
						},
				})