# React 16 error on after build

**URL:** <https://devforum.zoom.us/t/react-16-error-on-after-build/5693>\
**Category:** Web\
**Created:** [August 27, 2019, 4:27am UTC](https://devforum.zoom.us/t/react-16-error-on-after-build/5693 "2019-08-27T04:27:26Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![vincent.engelmann1](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/vincent.engelmann1/32/975_2.png) [@vincent.engelmann1](https://devforum.zoom.us/u/vincent.engelmann1)\
**Post date:** [November 5, 2019, 5:37pm UTC](https://devforum.zoom.us/t/react-16-error-on-after-build/5693/8 "2019-11-05T17:37:13Z")

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Two confusing bits to this

1. newer create-react-app webpack configs might be using TerserPlugin instead of UglifyJsPlugin
2. using `keep_fnames: true` (which also applies to TerserPlugin) might not be enough to prevent mangling zoom sdk’s code. In my case I had to remove TerserPlugin alltogether and will need to look for an alternative or look into config options more deeply.

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