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ReferenceError: b is not defined

See original GitHub issue

Apologies if this is out of scope, but I have a bug in webpack 4 with --mode production.

It appears it is a result of the optimization.minimize config, turning minimize off fails to reproduce the issue. I couldn’t identify which uglify option specifically causes it though.

"dependencies": {
  "graphiql": "^0.11.11",
  "graphql": "^0.11.7",
  "codemirror": "^5.36.0",
  "codemirror-graphql": "^0.6.12",
  "react": "^16.2.0",
  "react-dom": "^16.2.0"
}

Issue Analytics

State:
Created 5 years ago
Reactions:5
Comments:11 (4 by maintainers)

Top GitHub Comments

5reactions

jimmybrawncommented, Apr 17, 2018

So we’ve fixed it by doing the following in webpack 4:

 minimizer: [
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        uglifyOptions: {
          compress: false,
          ecma: 6,
          mangle: true
        }
      })
    ]

this seems to work on production

0reactions

acaocommented, Dec 1, 2019

@sekharp the current webpack 4 example we have, which uses webpack’s new alternative to uglify (the name escapes me) is out and working with 0.17.0, please give that a try with webpack 4 if you can? or maybe it will work with uglifyjs plugin again too?