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· 3 min read
John Reilly

I spent today digging through our webpack 4 config trying to work out why a production bundle contained code like this:


My expectation was that with webpack 4 and 'mode': 'production' this meant that behind the scenes all process.env.NODE_ENV statements should be converted to 'production'. Subsequently Uglify would automatically get its groove on with the resulting if("production"!=="production") ... and et voilà!... Strip the dead code.

It seemed that was not the case. I was seeing (regrettably) undead code. And who here actually likes the undead?